eaton 7 hydrostatic transmission - peerless 1320

EATON 7 HYDROSTATIC TRANSMISSION - PEERLESS 1320
Table of Contents – Page 1 of 2
FOREWORD
SPECIFICATIONS
TRANSMISSION:
TRANSAXLE:
MAINTENANCE:
GENERAL INFORMATION
DESCRIPTION & IDENTIFICATION MARKINGS
INTERNAL TRANSMISSION SERVICE
PRINCIPLES OF OPERATION
SYSTEM OPERATION
TRANSMISSION OPERATION
TROUBLESHOOTING
PROBLEM DIAGNOSIS
GENERAL SYSTEM CHECKS
TROUBLESHOOTING GUIDE
ADJUSTMENTS
BRAKE
BELT TENSION
MOTION CONTROL FRICTION
NEUTRAL
TESTING
SYSTEM PERFORMANCE
REPAIR OPERATIONS
LUBRICANT REPLACEMENT
REMOVE DRIVE BELT-200 SERIES
INSTALL DRIVE BELT-200 SERIES
REMOVE DRIVE BELT - 250 SERIES
INSTALL DRIVE BELT - 250 SERIES
TRANSAXLE REMOVAL - 200 SERIES
TRANSAXLE INSTALLATION - 200 SERIES
TRANSAXLE REMOVAL - 250 SERIES
TRANSAXLE INSTALLATION - 250 SERIES
TRANSMISSION REMOVAL
TRANSMISSION INSTALLATION
CONTROL LINKAGE SERVICE
EATON 7 HYDROSTATIC TRANSMISSION - PEERLESS 1320
Table of Contents – Page 2 of 2
INTERNAL TRANSMISSION SERVICE
DISASSEMBLY/REASSEMBLY
RESERVOIR/ADAPTER-DISASSEMBLY
BODY/COVER-DISASSEMBLY
COVER-DISASSEMBLY
CAM RING-DISASSEMBLY/INSPECTION
PUMP ROTOR-REMOVAL
PINTLE ASSEMBLY--REMOVAL
PINTLE ASSEMBLY--DISASSEMBLY/INSPECTION
CHECK VALVE--REMOVAL
CHECK VALVE-INSTALLATION
MOTOR ROTOR-REMOVAL
ROTOR ASSEMBLIES--DISASSEMBLY INSPECTION
BODY-DISASSEMBLY
COVER--REASSEMBLY
CAM RING-INSTALLATION
PUMP ROTOR-INSTALLATION
PINTLE--INSTALLATION
BODY-REASSEMBLY
MOTOR ROTOR-INSTALLATION
COVER/BODY-REASSEMBLY
RESERVOIR/ADAPTER-REASSEMBLY
START-UP PROCEDURE
TRANSMISSION & TRANSAXLE
CONTROL LINKAGE
CLUTCH LINKAGE
DRIVE BELT & PULLEYS
EATON MODEL 7 HYDROSTATIC TRANSMISSION
AUTOMATIC
TRANSMISSION
REPAIRMANUAL
Peerless Model 1320 Transaxle with
Eaton Model 7 Hydrostatic
FOREWORD
This service andrepairmanual
has been compiled toprovideauthorizedWheel
Horse service personnel with the proper procedures and techniques for servicingthe
Peerless Model1320transaxle
with Eaton Model 7 hydrostatic transmission.
The following Table of Contents lists a l l areas covered. It is advisable to read all
of the introductory sections first to gain a proper understanding of the automatic transmission system.
The automatictransmission and transaxle are sophisticated pieces of machinery.
Maintain strict cleanliness control during all stages of service and repair. Even a small
amount of dirt or other contamination can severely damage the
system.
This manual covers thetransmission system as used during the 1982 model
year.
with the Eaton
hydrostatictransmission and Peerless 1320 transaxle.
It may be used to the extent applicable for later model tractors equipped
TABLE OF CONTENTS
Page
Page
........................................ 1
GENERAL INFORMATION ................2-3 & 16
SPECIFICATIONS
Transmission Description&
IdentificationMarkings ................................
2
Internal-Transmission Service.............. 3 & 16
PRINCIPLES OF OPERATION
.................. 3-4
System Operation.....................................
Transmission Operation ..............................
TROUBLESHOOTING
.... 3
........... ..........4-6
..........................................
Brake ..........................................................
Belt Tension ................................................
Motion Control Friction ................................
Neutral ........................................................
........................................................
9
System Performance ....................................
REPAIR OPERATIONS
............................
9
9-15
Lubricant Replacement..................................
9
Drive Belt Removal& Installation .......... 10-11
Transaxle Removal& lnstallation.......... 12-13
Transmission Removal& Installation .......... 14
........................ 14-15
Control Linkage Service
4
Problem Diagnosis ........................
.............. 4
General System Checks..............................
‘4
6
Troubleshooting Guide .................................
ADJUSTMENTS
TESTING
7-8
7
7
8
8
EATON MODEL 7 INTERNAL
TRANSMISSION SERVICE
..........
16-25
.... 26-37
PARTS DRAWINGS& PARTS LISTS
26
Transmission & Transaxle ..........................
28
Control Linkage ..........................................
Clutch Linkage............................................ 30
32
Drive Belt & Pulleys ....................................
EatonModel 7 Transmission .............. 34-37
TRANSMISSION:
Eaton Model 7; Radial, Ball-piston Pump
&Motor
Displacement
Pump, Variable 0-.465cu. in./rev.
Motor, Fixed .767 cu. in./rev.
Speed (as used)
Input 3300 RPM
Output 0-1996 RPM
Torque Output (Max.)
Continuous 150 in. Ibs.
Intermittent 228 in. Ibs.
Operating Temperature
Maximum Continuous 180ºF
Cooling
6-5/8'' Diameter Fan
TRANSAXLE:
Peerless Model 1320;Single-speed, with Bevel Gear
Differentialand DoubleReductionGears
Gears & Shafts
Heat-Treated Steel
Bearings
Needle
Bronze
-4
-4
Case Halves & Axle Housings
Cast Aluminum & Iron
Ratios & Speeds
Drive Belt Pulley Ratio .995:1
Overall Reduction Ratio 22.2:l
Axle Shaft Speed
@ 1996 RPM Eaton Output - 89.9 RPM
Tractor Speeds (approx.)
Forward 0-5.2MPH
Reverse 0-3.2 MPH
MAINTENANCE:
Transmission Oil Check
- Before Each Use
-
Transaxle Oil Check
After every 25 hours Operation
Oil Changes - Not Required
Oil Specifications Transmission - ¾ qt. SAE 20 Premium Motor Oil
Transaxle - 1-3/8 qt. SAE 90 EP
-
Adjustments
Foot/Parking Brake
Motion Control
Friction
Motion Control Neutral
Torque Value (ThreadSizes)
¼-20 - 8 ft. Ibs.
5/16-18 - 17-22 ft. Ibs.
3/8-16 30-35ft. Ibs.
½-13 75-80 ft. Ibs.
-
As Required
GENERALINFORMATION
DESCRIPTION & IDENTIFICATION MARKINGS
The Eaton Model 7 hydrostatic
transmission,
as
used by Wheel Horse, is equipped withforward &
reversecheckvalves,
andvibrationdampening
pistons. The transmission has a keyed output shaft and
input shaft, both of which are supported byball
bearings.
NOTE
This manual uses the terms
"transmission,
hydrostatictransmission,
and hydrostatic unit"
to refer to the Eaton Model 7 Hydrostatic Transmission.The term"transaxle"
is used to refer
to theassembly of intermediate gears, differential and case halves that make up the Peerless
Model 1320 Differential and Gear Reduction Unit.
“Transmission System" and "AutomaticTransmissionSystem" are used to refer to the entire
drivetrain as an assembly, including engine,
transmission,transaxle,
andallrelated
parts.
FIG. 1.
The transmission is stamped with modelnumber,
manufacturing date code, and direction of rotation.
Rebuiltunits are also marked with a "1".
The
Peerless
transaxle number is stampedon
a
metal plate secured to the left case half, just below
the axle housing.
Internal TransmissionFeatures
-2-
MADE IN U.S.A
MODEL
a SPECIFICATION NO.
MANUFACTURINGDATE
REBUILT UNIT
DIRECTION OF INPUT SHAFT
ROTATION(CLOCKWISE)
TRANSMISSION
1449
FIG. 2. Identification Markings
FIG. 3. Transmission System
INTERNAL TRANSMISSION SERVICE
Repair procedures contained
in this manual are for OUTOF-WARRANTY Eaton Transmission only. TroubleshootSYSTEM OPERATION
ing instructions in this manual are intended
to helpyou
determine whether a problem is caused by an improperly
Tractor drive belt turns transmission input shaft, which is
operating hydrostatic unit or some other part of drivesysconnected
to pump section. Pump section of transmission
tem.
controls volume and direction of oil flow to motor section,
depending on position of motion control linkage. As motion
control lever is moved away from neutral position, flow of oil
INTERNAL TRANSAXLE SERVICE
is increased to motor, making it go faster. Motor output shaft
drivestractoraxlesthroughtworeductiongearsanda
Repair of Peerless transaxle is not covered in this manual.
differentialassembly.TorqueisgeneratedindirectreRefer to manufacturer's service literature for Peerless Model
sponse to load; higher pump pressure
(toque) is generated
1320 Transaxle.
as resistance to movement increases.
PRINCIPLES OF OPERATION
TRANSMISSION SYSTEM
Major parts of Wheel Horse automatic transmissionsystem are identified in Figure
3.
For optimum performance engine should be operated at
full throttle. Under high load conditions tractor should be
slowed using motion control lever, which will increase output
torque. This is due to lower friction and pumping losses at
to
slower transmission output speed, and can be compared
effect of shifting a manual transmission to a lower gear.
-3-
TRANSMISSION OPERATION
The flow diagram shows the hydraulic circuits inside
the
hydrostatic
unitand
illustrates highandlow
pressure areas during operation (Fig. 4).
The operator controls the transmission bymoving
thecontrol shaft connected to the cam ringwithin
thepump.
With thecontrolshaft
in neutral,orits
centeredposition,no flow is generated by the pump
and therefore the motor portion is at rest.
Whenthecontrol
shaft i s moved fromneutralin
the "forward" direction,thecam
ringin the pump
is moved off center and the pump ball-pistons create
a flow of fluid. The position of the control shaft/cam
ring i s infinitely variable and any flow rate is possible
up to maximum cam ring movement/maximum pump
displacement.
The flow created by the pump moves to the fixed
displacement
motor
throughinternal
passageways.
Because themotor is afixed displacementunit,the
motorrequires a specificvolume
offluid
for it to
makeonecompleterevolution.
Whenthecontrolshaft
i s moved fromneutral to
the"reverse"direction,thecam
ring is swung off
center to the opposite side of the pump and the flow
from the pump is "reversed". This flow i s directed
to theother
side of the
motor
causing
its
output
shaft to rotate in theoppositedirection.
The pump
input shaft always rotates in onedirection, dictated
by theengine, while themotor output shaft rotates
in either direction dependingon
direction offlow
from the pump.
The pump discharge flow is high pressure (dictated
by load) fluid. The flow returned from motor to pump
i s low pressure fluid.
Due to internal leakage, the fluidbeing returned
to the inlet side of the pump from theexhaust side
of themotor is less than required by thepump. To
check valves are located in
replace this needed fluid,
each side of the closed loop. The check valve located
onthe
low pressure side of the pump will open
allowing fluid to enter the loop to make up leakage
losses.
The Model 7 has twodampening pistons, which
rest against the
cam
ring and are controlled by
system
pressure.
In operation they
reduce
control
shaft vibration and transmissionnoise.
Low Pressure Oil (Return)
FIG. 4.
HydrostaticTransmission Flow Diagram
TROUBLESHOOTING
1. Check engine for correct no-load RPM.
PROBLEM DIAGNOSIS
To save time and expense, a systematic approach
should be used when troubleshooting any transmission problem, starting with a thorough understanding
of how the systemoperates.The
trouble symptoms
should be carefully noted and compared to the
TroubleshootingGuide.
Whenever a problem occurs ALWAYS CHECK THESE
ITEMS FIRST:
1. Transmission and transaxle oil level and con-
2. Run engine atloadand
check for proper per-
formance.
3. Check drive belt,transmissionclutch,pulleys,
keys and keyways.
MOTION CONTROL LINKAGE
2. Motion controllinkage.
1. Check condition of all linkageand
securing
hardware. Replace worn parts to
minimize
free movement.
3. Gaskets and seals.
4. Transmission drive belt,pulleys
2. Check for damage or binding parts that prevent
full forward and reverse travel.
dition.
and transmis-
sionclutch.
5. Owner modifications to transmission system.
GENERAL SYSTEM CHECKS
OIL SYSTEM
1. Check oil level when cold; overfilling the
transmission
reservoir
reduces
the
available
expansionarea and may result in overflow at
operating temperature. A low oil level will
cause erratic operation and may cause permanent damage to thehydrostatic unit. Replace
leaking seals and gaskets.
2. Check thecolor of the oil; if the natural color
has, changed to black, overheating is indicated.
If the oil is amilkywhite
color, water contamination i s indicated..Changethetransmission oil before further operation ortests.
COOLING SYSTEM
1. The cooling systemconsists of the cooling fan
and cast fins in the aluminum transmission
cover. The fan, cover fins, and area surrounding
the transmission should be kept clean for maximum coolingefficiency.Replace
a broken or
crackedcooling fan.
I
ENGINE AND INPUT DRIVE
Use care to prevent water from entering the
transmission or transaxle when using high pressure or steam cleaning equipment. Cover the oil
reservoir and avoid directing the spray at seals.
3. Check motion control friction andneutraladjustments.
4. Check condition ofcontrolarm,key
mission control shaft.
and trans-
TRANSAXLE
1. Disengage
the
transmission
clutch
and move
the motion control lever fully forward; push the
tractor slowly and check for unusual noisesor
seizing.
2. Check for differential action and smoothoperation of thegear train. Raise the rear of the
tractor,disengage the transmissionclutch and
movethe
motion controllever
fullyforward.
Check differential action by holding one wheel
stationary whileturning
the otherwheel.
If
necessary,open
the transaxle to check gears,
bearings,keys and keyways.
HYDROSTATIC TRANSMISSION
1. You shouldnotbe
able to push the tractor in
either direction when the transmission clutch is
engaged. If all other parts of thesystem are
good and thetractorcan be pushed in oneor
both directions,thetransmissionhasexcessive
internalwear or aninternalpart
has failed.
TRACTOR OPERATES IN BOTH DIRECTIONS, BUT LOSES
POWER AS OIL BECOMES HOT.
TRANSMISSION OVERHEATS
FAN & TRANS.
CONDITION
COOLING FINS
SIGNS
LOW
OF
TRACTOR
FAULTY
OVERLOADED
LEVEL
PROPER
MAINTAIN FULL
ENGINE RPM,
REDUCESPEED
AND LOAD
REPLACE FAN
REPLACE OIL
REPLACE HYDROSTATIC
TRANSMISSION
Probable Defect:
High Internal
Leakage Due to
Wear/Contamination
TRACTOR WILL NOT OPERATE IN EITHER DIRECTION
INPUTCHECK
MOTION
CHECK
CONTROL LINKAGE
LEVEL
PROPER
DRIVE & TRANSAXLE
ADJUST, REPAIR
REPLACEOR REPLACE
OK
REPLACE HYDROSTATIC
TRANSMISSION
Possible Defects:
Both Check Valves
Stuck Open
High Internal
Leakage Due to
Wear/Contarnination
Mechanical Failure
-6I
-
TRACTOR DOES NOT RETURN TO NEUTRAL.
TRACTOR OPERATES NORMALLY IN ONE DIRECTION,
BUT IS VERY SLOW IN OPPOSITE DIRECTION.
TRACTOR OPERATES IN ONLY ONE DIRECTION.
C
ACE CHECK MOTION CHECK
SSION
OK NEUTRAL OK LINKAGE
CONTROL
AND
FRICTION ADJUSTMENT
I
ADJUSTMENT
I
FAULTY
I
I
I
REPAIR
I
Possible Defects:
One
Check
Valve
Stuck Open
Mechanical Failure
I
I
ADJUST,
OR REPLACE
TRACTOR OPERATES ERRATICALLY
INPUTCHECK
MOTION
CHECK
CONTROL LINKAGE
FRICTION ADJUSTMENT
FAULTY
FAULTY
REPLACE HYDROSTATIC
TRANSMISSION
Probable Defect:
Check Valve
Sticking Periodically
I
ADJUST, REPAIR
OR REPLACE
REPAIR
OR REPLACE
Brake adjustment is made at brake caliper.
ADJUSTMENTS
1. With brake pedal released, loosen lock nut (200-Series
discbrakeuntil adjustment
nut
tightenand Only)
is no
Brake
disc is mounted
on
first
intermediate
gear
shaft,
longer
free to
back off adjustment nut just
which extends through a needle and seal in left transaxle enough
to permit disc to turn
BRAKE
If position of nut onbrake rod is changed for some reason,
it should be readjusted so that distance between spring side
(front) of nut and end of rod is 7/8 in.
If tractor creeps after brake pedal is depressed and then
released,neutraladjustmentshould be made.
BELT TENSION
AND LOCKNUT
I
L
FIG. 5. Brake Adjustment
Drive belt tension
can be adjusted to stop
belt from creeping when transmission clutch is disengaged. Belt tension
adjustment should be checked after a new belt has been
"run in" for15 minutes and then allowed to cool.
Before disengaging transmission clutch, check two belt
guides (200-SeriesOnly)forproperadjustment. Bothguides
(200-Series Only) are located nearengine pulley, and should
be 1/16-1/8 inch away from belt. Fixed guide (200-Series
Only)welded to PTOclutchbracketshould be bentas
necessary to adjust it.
-7-
NEUTRAL
To testthe neutral adjustmentthe tractor should
be brought to a stop from both directions on a level
surface, usingthe
Brake/Return toNeutral
pedal.
Once the tractor is stopped,releasethepedal.
If the
tractor “creeps” i n either direction, neutral adjustment
is necessary.
1. Supporttherear of the tractor so both wheels
are off the ground.
2. Start the engine and run at full throttle. Move
themotioncontrollever
forward and wait for
the drive
train
to
reach normal
operating
temperature.
3. Depress the brakepedal fully and release.
4. Slightly loosenthelock bolt and turn the large
eccentric with awrench until the rear wheels
stop turning. Turn the eccentric
in the opposite
direction until thewheels
start turning,then
settheeccentric
mid-way between these two
positions (Fig. 7).
setting neutral, which will help preventaccidental contact with the cooling fan.
5. Tightenthelock
boltand
retest for neutral,
from both directions, at full throttle.
FIG. 6.
6. If the tractor cannotbeneutralized
in both
directions with the
eccentric,
thecontrol
rod
length
should
be
reset and neutral then readjusted.
Belt Tension/GuideAdjustment
The flat idler pulley located near the engine
pulley
a.Set
i s mounted in a slotted bracket. If the belt creeps with
this pulley
the transmission clutch disengaged, loosen
and move it in toward thecenter of the tractor in
small increments, until the belt stops whendisengaged. The fixed belt guide may require readjustment
after the pulley is moved.
MOTION CONTROLFRICTION
The motioncontrollevershouldmovewhen
approximately 6 Ibs of force i s applied to it. The motion
control friction adjustmentnut is locatedunderneath
the tractor (Fig. 7). Tighten or loosentheadjustment
nut as required.
FIG. 7.
Motion Control Friction and
Neutral Adjustments
the parking brake.
b. Disconnect therearendofthe
c.
Adjust the position of the cam plate so that
the
rear
edge
of the friction washer i s
even with therearend
of theslot i n the
camplate.
d. Adjustthe
rod endonthecontrol
rod so
that the bolt entersthehole
i n the cam
plate exactly at a right angle (square) to
it.
e. If asatisfactory neutralstill cannotbe obtained, check linkage for wear or damage.
FIG. 8.
-8-
control rod
from the cam plate.
Control Rod Length Adjustment
n
3.
TESTING
SYSTEM PERFORMANCE
A test for observing
transmission
system
performance under load can be helpful when checking a "low
power", or "tractor loses power" condition.
1. Operatethe
tractor tobring theengine
and
drive train to normal operating temperature.
2. Anchor the rear of the tractor to an immovable
object (tree,beam,etc.)
with achain secured
to thetransaxle
case.
The
rearwheelsmust
be on a high friction surface, such as unfinished
concreteorasphalt.
The front wheels may be
placed against a curb or wall as an alternative,
but provision mustbemade to keepthe front
of the tractor on the ground.
3. Set theengine at half throttle and movethe
motion control lever fully forward. The tractor
shouldhaveenoughpower
to spinthe
rear
wheels, with an operator in the seat.
4. If the wheels do not spin, carefully note engine,
drive belt, and transmission/transaxle
performance to isolate theproblem.
5. If the
test
results
are marginal,
the
tractor
shouldbe used underactualoperatingconditions to isolate theproblem.
Add oil to bring levelto
LEVEL COLD line on
reservoir.
4. Purge trapped air from thesystem by turning
transmission inputpulley
(crankengine
with
starter with sparkplug(s)disconnected).
Also
hand push tractor a few feet forwardand
backward to purge trapped air from the motor
sectionofthetransmission.
5. Check oil level, then test operatethe tractor.
Recheck the oil level after the oil cools.
6. Noisy operation could be due to air still trapped
in the system.Remove
thevent
plug at the
top of the transmission to release it.
7. Replace thetransmission if it does not operate
properly after changing the oil. Overheating or
contaminationhas caused permanentdamage.
REPAIR OPERATIONS
LUBRICANT REPLACEMENT
Undernormalconditions,periodicreplacement
FIG. 9.
of
Transaxle Oil Filland Drain Plugs
FIG.
12.
-9-
Transmission Oil Fill Access
Hole
-
REMOVE DRIVE BELT 200 SERIES INSTALL DRIVE BELT
- 200 SERIES
1. Blockrearwheelsandsupportfront
of tractor on
jackstands, if desired.
2. Disengage PTO. disengage transmission clutch, and
move motion control lever fully forward.
3. Loosen PTO adjustment bolt locknut and back adjustment bolt out of PTO bracket.
4. Remove PTO pulley from engine.
FIG. 13. Remove PTO Pulley; Loosen idler Pulley
5. Loosen flat idler pulley indicated in Fig.
13.
6. Loosen two nutsonrighthandclampholdingshift
14).
linkage cross rod to rear footrest (Fig.
7. Work belt off transmission input pulley.
8. Work belt off rear (clutch) idler and
"V" idler pulleys.
9. Remove belt from engine pulley; bendbelt guide out if
required.
-
FIG. 16. Belt installation Front
-
FIG. 14. Belt Removal Rear
Belt
FIG. 15. Removal
- Front
FIG.
17. Belt
Installation
-1 0-
- Rear
1. Place belt on engine pulley and route through front
idlersasshowninFigure
16. PTOpulleycanalsobe
reinstalled at this time,if desired. Adjustment bolt (Fig. 13)
should be screwed in until there .010
is a inch gap between
brake pad and pulley (PTO engaged). Tighten lock nut.
2. Install rear end
of belt on pulleys as shown in figure
17.
Be sure top run
of belt (closestto frame) is also placed over
groove of "V" idler pulley. Retighten two shift linkage clamp
nuts (Fig. 14).
3. Secure adjustable flat idler (Fig.
adjustment slot.
13) in middle of its
4. Checkbeltguideandbelttensionadjustmentsas
described under "BELT TENSION" in this manual.
FIG. 20 Rear Belt Routing
1. Blockrearwheelsandsupportfrontoftractoron
jackstands, if desired.
2. UnplugelectricalPTOconnector,removeanti-rattle
18).
spring and remove PTO assembly from engine (Fig.
FIG. 21 Install belt on transmission
6. Work belt off transmission input pulley, rear flat idler
20).(Fig.
pulley, "V" idler pulley and remove belt from tractor
FIG. 18 PTO Assembly
INSTALL
DRIVE
BELT
- 250 SERIES
3. Loosen flat idler pulley (Fig. 19).
1. Install belt on rear"V" idler, flat idler and transmission
4. Loosen two nuts on fight hand clamp holding shift linkto frame) is
pulleys (Fig.21). Be suretop run of belt (closest
age cross rodto rear footrest (Fig. 20).
alsoplacedovergroove
of "V" idlerpulley.Route
belt
through front idlers and work belt on engine pulley22).
(Fig.
FIG. 19 Front Belt Routing
FIG. 22 Install belt on Engine
Pulley
2. Secure adjustment flat idler in middle of its adjustment
slot (Fig. 20). Retighten two shift linkage clamp nuts.
3. Reinstall PTO assembly and spring (Fig. 18). Reconnect PTO wire connector. Checkbelt tension as described
under "BELT TENSION"in this manual.
-
TRANSAXLE REMOVAL 200 SERIES
1. Disengage transmission clutch. Move motion control
lever fully forward.
2. Slip drive belt off transmission input pulley (Fig.
23).
FIG. 25 Transmission Mounting
FIG. 23 Remove Drive Belt from Pulley
3. Disconnect front endof control rod (Fig. 24). Remove
brake lever from brake lever stud. Remove two brakepad
pins.
FIG. 24 Disconnect Rod and Brake Lever
FIG. 26 Remove Tractor from Transaxle
4. Support rear axletubes and front
of transmission using 2. Start three transaxle to frame bolts into their mounting
three jackstands (Fig. 25). Remove three bolts securing top
holes, then install U-bolts. Tighten all hardware (Fig. 25).
"U"bolts.
of transaxle to tractor, then remove two axle
3. Reconnect control rod and install brake pins and lever
5.Carefullyraiseframeuntilclearoftransmission
oil (Fig. 24). Remove jackstands.
reservoir, then roll tractor forward out
of the way (Fig. 26)
4. Install drive belton transmission input pulley (Fig.23).
TRANSAXLEINSTALLATION
SERIES
- 200
1. Place transaxle on three jackstands. Alignment pins
if desired.
can be installed in top transaxle mounting holes
Lower tractor frame onto transaxle (Fig. 26).
5.Adjustbrakeasoutlinedinthismanualunder"ADJUSTMENTS".
6. Testoperatetractor; if applicablemakeneutraland
controlrodadjustmentsasoutlinedinthismanualunder
"ADJUSTMENTS".
-12-
TRANSAXLE REMOVAL 250 SERIES
1. Loosen belt adjustment flat idler pulley (Fig. 19).
Work
drive belt off transmission input pulley (Fig. 27).
5. Remove three bolts securing top of transaxle to tractor.
then remove two axle"U" bolts(Fig.29).
6. Carefully raise tractor frame until clear
of transmission
30). (Fig.
oil reservoir, thenroll tractor forward out of the way
FIG. 27 Remove Belt from Transmission
2. Disconnect front end of control rod (Fig. 28). Remove
brake lever from brake lever stud. Remove two brake pad
pins.
1467
FIG. 30 Remove Tractor from Transaxle
FIG. 28 Disconnect Rod and Brake Lever
3. Support rear axle tubes and front of transmission
three jackstands (Fig. 29).
TRANSAXLEINSTALLATION
SERIES
using
- 250
1. Place transaxle on three jackstands. Alignment pins
if desired.
can be installed in top transaxle mounting holes
Lower tractor frame onto transaxle (Fig.
30).
2. Start three tansaxle to frame bolts into their mounting
holes, then install U-bolts. Tighten all hardware (Fig. 29).
3. Remove jackstands. Reconnect control rod and install
brake pins and lever (Fig. 28). lnstall drive belt on transmission input pulley (Fig. 27).
4. Reinstall fuel tank, fender and seat.
FIG. 29 TransmissionMounting
5. Adjust belt tension as outlined under "ADJUSTMENTS"
in this manual. Adjust brake as outlined under "ADJUSTMENTS" inthis manual.
6. Test operate tractor; if applicable make neutral and
4. Remove seat and rearfender. Shut off gas and remove
control
rod adjustments as outlined under "ADJUSTMENTS"
gas tank.
in this manual.
-13-
TRANSMISSION INSTALLATION
TRANSMISSION REMOVAL
1. As applicable transfer linkage, pulley and gear to new
transmission.Useananti-rustcompoundoninputpulley
shaft (Texaco Rust Preventative, Code
1976, Compound "L"
Light, or equivalent).
2. Tip transaxle up onto left wheel and remove right wheel
2. Place a new gasket on transaxle, using grease
to hold
(Fig. 31).
it in place.
3. Install transmission on transaxle and secure in place.
Use new lockwashers on bolts.
4. Install right rear wheel.Useanti-rustcompoundon
axle.
5. Reinstalltransaxleasoutlinedunder"TRANSAXLE
INSTALLATION" in this manual.
1.
Removetransaxlefromtractorasoutlinedunder
"TRANSAXLE REMOVAL" in this manual.
CONTROL LINKAGE SERVICE
Footrest CrossRod Linkage
1. Disconnect front end of control rod. Disconnect rear
end of lift rod (Fig. 34).
FIG. 31 Remove Right Wheel
3. Remove four bolts holding transmission
and remove transmission. Discard gasket.
to transaxle
4. Remove parts from transmission as shown in fig. 32.
5. Disassemble cam plate assembly as shown in fig. 33.
FIG. 34 Disconnect Rods
2. Remove bolt securing shift lever. Remove left and right
footrest cross rod clamps, and remove cross rod and linkage
(Fig. 35). Refer to exploded view drawing for assemblyof
parts used on cross shaft.
FIG. 32 Service Parts Attachedto Transmission
FIG. 35 Remove Cross Rod and Linkage
FIG. 33 Cam Plate Disassembled
3.Reinstallassemblyfollowingsteps1&2inreverse
so that lever can still
be moved
order. Tighen shift lever bolt
right-to-left in neutral shot.
Brake/Return to Neutral Pivot
Shaft
\
1. If applicable, pull lift cable out of "U"shaped bracket.
36).
Remove two bolts securing shaft mounting bracket
(Fig.
2. Disconnect brake rod return spring (Fig.37).
3.Disconnect two brake rods from pivot bellcrank37(Fig.
).
4. Remove E-ring from left end of pivot shaft (located
outside frame above footrest).
5. Remove brake pivot shaft (Fig.
38). Loosen left footrest
if necessary.
cross rod clamp and remove right clamp,
FIG. 37. Disconnect Spring and Brake Rods
FIG. 36. Remove Cable, Mounting Bolts
Reinstall pivot shaft following steps1-5 in reverse order.
Be surereturnto neutral cam and
pin are engaged properly.
FIG. 38 Brake Pivot Shaft Removal
Adapter #1
INTERNALTRANSMISSIONSERVICE
Reservoir
The followingrepair procedures for the Model 7
EatonTransmission is for OUT-OF-WARRANTYtransmissions ONLY. Transmissions within warranty period
mustbeserviced with new or rebuilt complete units.
Repair parts are available using regular Wheel Horse
procedures.Repair
part numbers are listed in this
manualand onBlueColorMicroficheCard
for the
Model 7 Transmission Repair Manual.
SUGGESTED ITEM AIDS
(1) 2" x 6" x 10" WoodBlock
with
Hole
(1) 2" x 2" x 2%" Wood Block
Seal
(2) Large
Wide
Rubber
Bands
(1) Hardened
Dia.
x
10" Long
Rod
(1) Tube of Vaseline
FIG. 40
Disassembly/Reassembly
Reservoir/Adapter-Disassembly
Eaton lightduty transmissions are equipped with
one of two adapters or a reservoir
as shown in Fig.
40.
1. Remove adapter or reservoir by rotating clockwise.
IMPORTANT
The adapters and reservoir have lefthand
threads. To remove turn CLOCKWISE.
FIG. 39
Cleantransmissionexteriorthoroughlybefore
repairs are begun. Use a cleaning solution that will not
affect paint, gaskets, rubber seals, and plastic.
To remove adapter # 1 use asix point 1½"
wrench or socket.
To remove adapter # 2 use a six point 1" hex
wrench or socket.
To remove reservoir use a small filter or web
wrench.
2. Removeseal
ringfrom
cover and discard.
NOTE: It is recommended that all seals bereplaced
with new ones whenever transmission is disassembled
and reassembled.
compressed air is used i n cleaning, do
se lip seals or bearing surfaces to high
Drain fluid from transmission.
NOTE: A 2" x 6" x 10" woodenblock with ainch
hole in thecenter
i s recommended for asuitable
bench fixture.
Body/Cover-Disassembly
Cover-Disassembly
Cover
Input Shaft
and Bearing
Assembly
Retaining Ring
FIG. 42
7. Remove input shaft retainingring.
driveinput
cover.
shaft andbearing
Cover
FIG. 41
Input Shaft
IMPORTANT
Seal
Beforedisassemblingtransmission,scribe
a
line across the cover and body to ensure correct
reassembly.Incorrectassembly will change output shaft rotation.
FIG. 43
J
I
Press or
assembly from
8. Press or drive input shaft seal from cover.
3. Use
inch Allen wrench to remove (2)
cap
screws.Where
applicable,remove dump valve
shaft.
Dump Valve
\
Guide
4. l i f t cover to separate from body.
Do not allow cam ring, pintle, or pump rotor
assembly to lift with cover. The pump ball piston
assembly must remain intact as ball pistons are
matched to pumprotor bores.
If coverdoes not separate easily from body
because of fluid seal, tap body and/or cover
with plastichammertobreakseal.
FIG. 44
9. Remove button from cover.
5 . Remove dump valve bracket, and spring, when
used.
6. Remove
seal
ring and
discard.
Where applicable, remove dump valve guide,
nut, and O-ring. Discard O-ring.
Pump
Race
Control Shaft
FIG. 47
FIG. 45
NOTE: Cam ring and pump race are available as an
assembly.
10. Use a sharp, narrowtoolto
pierce topmetal
part of oil seal and remove seal from cover.
NOTE: If irregularities are noted in cam ring or pump
race, it i s reasonable to assume that one or more ball
pistons and rotor bores will also be damaged.
Do notscratchcontrolshaft
or distort seal
counterborewhen
removing seal.
PumpRotor-Removal
Cam Ring-Disassembly/lnspection
Pintle
Pump
Rotor
Assy.
Cam Ring
Assy.
Wide
Rubber
Band
Cam
Body
FIG. 48
13. Hold pintle assembly in positionagainstbody
and removepump rotor assembly intact.
FIG. 46
11. Removecam ring assembly from pintle. Remove
cam ring insert.
Pintle Assembly-Removal
Pintle
Assy.
IMPORTANT
Use special care when removing camring from
pump rotor assembly.The ball pistons must remain inplace as they are matched to rotor bores.
Use a wide rubber band to hold ball pistons in
place.
I
12. Inspect area where ball pistons contact cam ring
pump race. This area must be smooth and completely free of irregularities. If it i s not, replace
cam ring assembly.
FIG. 49
14. Holdmotor rotor assembly in bottomposition
andtaplightly
onbody. Lift pintle assembly
out of body.
-18-
17. Press or drive out coil pin that retains two check
Pintle Assembly-Disassembly/lnspection
valve bodies. Use
tap holes i n check
bolt or a threaded
bodies frompintle
a fourblade 5/16-18 tapto
valve bodies. Insert a long
puller, pull the check valve
housing and discardthem.
18. Remove check balls and retaining ring.
19. Inspectcheck valveballsandretaining
Replace any defective parts.
rings.
Check Valve-Installation
20. Installretaining rings and check valveballs in
bores of pintle. Press new check valvebodies
i n bores.Press far enough for coil pin cleara nce.
Pintle
FIG. 50
of retaining rings DO
bodies into bores.
15. We do not recommend complete disassembly of
pintle assembly for cleaning. Normalflushing
should be all that i s required. However, if complete disassembly is required, use the following
procedures:
21.
Press coil pinintopintleuntil
slightly below surface.
flush with or
Motor Rotor-Removal
NOTE: Do not remove two large plugs located on pintle
journal.
16. Inspectdampeningpistons
andpintle journals,
irparticularly i n the porting area, forany
regularities suchas scoring or groovescutbetween ports.
Motor
Wide
Rotor
Assy.
Rubber
Band
If any irregularities are noted: Replace pintle
assembly.
Check Valve-Removal
Body
NOTE: Removal of check valve is not necessary if
check valve balls move freelyand
FIG. 52
seat properly.
22. Remove motorassembly
intact from thebody.
Use specialcare when removingmotor rotor
from body. The ball pistons MUST remain i n
place as they are matched to motor bores.Use
a wide rubber band to hold ball pistons in place.
\
or Puller
ing
(2)
Pin
Body
Balls (2)
I
Check
Valve
Coil
(2)
Contact
Motor
Race
Line
FIG. 53
FIG. 51
-19-
Body-Disassembly
23. Inspectcontact lineof
motor ball pistonson
motorracelocated
in body. This contact area
must be smooth and completely freeofany
irregularities. If any irregularities are noted,
replacemotorrace.
Snap
NOTE: If irregularities are noted in motor race, it is
reasonable to assume that oneormore
and rotor bores will also be damaged.
ball pistons
Rotor Assemblies-Disassembly Inspection
Spring
Motor
Rotor
output
Shaft
FIG. 55
28.Removesnap
ring that retains output shaft and
tap or press shaft from body.
Pump
Rotor
FIG. 54
Body
24.Inspect
rotor assemblies.Remove
piston balls
from rotor, one at a time, by working clockwise
from letter stampedontheface
of rotor and
placing in a prepared container.
Seal
Bearing
NOTE: Each ball must be replaced in same bore from
which it wasremoved. Use a suitablecontainer for
piston ball storage suchas an egg carton or ice cube
tray.
Retaining
Ring
FIG. 56
29. Remove largeretainingringthat
retains output bearing to body. Drive or press the output
bearing and seal from motor body.
25.Inspect for broken or collapsed springs in motor
rotor assembly.
NOTE: When brokenorcollapsedspringsare
found
with no other irregularities, thesprings maybereplaced individually without replacing complete motor
rotor assembly.
26.Inspect
pistonballs. Theymustbesmooth
completely free of any irregularities.
Cover-Reassembly
30.Inspectcoverassembly,especially
around control shaft area. Replacecoverassembly if it i s
broken,crackedor
if sideclearancebetween
control shaft and coverexceeds.006".
and
31. In mostcases,
it will not be necessary to remove the control shaft from cover. If the dowel
i s loose
or
broken
in control
shaft,
remove
shaft using following procedures.
27.
Inspect
rotor bores, rotor bushing andpintle
journals for irregularities or excessive clearance.
Ballpistonto rotor boreclearance i s select fit
electronically to .0002 to .0006 of an inch. When
irregularities orexcessiveclearance are noted,
replacecomplete rotor assembly.
Install ball pistons in their matching bores.
Hold them in place with a rubber band.
FIG. 57
-20-
n
32. Measuredistancebetweencenterof
andend
dowel pin
of shaft as shown in Fig. 61.
33. Turncoverover.
Use this dimension to locate
dowel
pin
in cover
face.
Drill
diameter
hole at center pointofdowel
pin. Drill hole
exactly in line with center of shaft.
FIG. 61
37. lubricate I.D. ofnew
cant.Thenpressor
pletely seated.
oil seal with clean Iubritap seal in bore until com-
Oil Seal
FIG. 58
Washer
Cover
FIG. 62
Lip
Seal
Cover
FIG. 59
FIG. 63
34. Pressloose or broken dowelpin out. Remove
retaining ring and washer from end of control
shaft. Remove control shaft outward from cover.
38. Lubricateinnersurface
of lip seal with a clean
lubricant. Press or tap seal into bottom position
in cover counter bore.
I
Pipe Plug
IMPORTANT
Be careful not to damage inner portion of oil
seal. Excessive pressing or driving of oil seal will
damage rubber portion of seal.
FIG. 60
35. Tap hole drilled with 1/8” pipe tap. Install
flush type pipe plug.
36. Lubricate a newcontrolshaft
andinstall
cover.Replacewasher
andretainingring
end
of
control
shaft.
Press new dowel
throughshaft
leaving 1-1/8 inch ofdowel
tending from shaft.
Retaining
Ring
1/8”
in
on
pin
ex-
Assy.
Whenpressing
newdowelpin
into control
shaft, Woodruff key in control shaft must be to
the left looking atthreaded end of shaft.
Cover
FIG. 64
-21
I
Pump Rotor-Installation
39. Install input shaft assembly into bottom position
in counter bore in cover. Install retaining ring in
groove located in front cover.
Pump Rotor
Rubber Band
CamRing-Installation
Cam
Ring
Cam
Ring
Insert
Button
Cover
FIG. 67
44. Aligninternal
spline in pump rotor assembly
with external spline on input shaft and install
pump rotor in cover.
Cover
Remove the rubber bandretaining
pistons (if used).
FIG. 65
40.
Install button in hole located in cover.
41.
Install cam ring insert with hole awayfrom
cam ring as shown in Fig. 65.
the ball
Pintle-Installation
Dump Valve
Springs
42. Align cam ring with control shaft pin and cam
ring pivot pin.
Install cam ringwith flush side of bearing
race facing cover. Press in firmly until cam ring
has bottomed in cover assembly.
Seal
IMPORTANT
Cam ring must move freely from stop to stop.
If binding occurs at either stop rotate cam ring
Ring
Pivot
Pin
O-ring
Dump
Valve
Guide
\
Shaft
Dump Valve
Shaft
FIG. 68
45.
Use a small screwdriver to compress and
hold dump valve bracket intopintle to clear
previously installed dump valve guide located
in cover.
FIG. 66
43. Whereapplicable, lubricate 0-Ringand install
in groovelocated in dump valve guide. Install
guide through cover andinstall0-Ring
and
nut. Lubricate dump valve, valve shaft and install in guide assembly.
NOTE: Check dump valve shaft for freedom of movement.
Install two springs and dump valve bracket into
pintle assembly.
46. Align pintle assembly with cam ringpivot pin
and guide pintle assembly into pump rotor. Push
to bottom position in cover.
NOTE: Doforce
not
pintle through pump rotor assembly as it i s a slip fit. The pump rotor assemblymust
turn freely onthe pintle by hand. If not recheck pintle
installation.
-22-
47. Push dump valve shaft in and threadinto dump
valve bracket. Torque to 2-3 Foot Pounds.
Retaining
Ring
48. lightly grease new cover sealing ringand install in groove in cover.
Snap Ring
Bearing
Body-Reassembly
Lip Seal
output
Shaft
FIG. 71
Body
51. Install output shaft bearing
by
positioning
bearing over output shaft and pressing on outerraceof
ballbearing tobottom position in
body.
FIG. 69
49. Lubricate inner surfaceof new lip sealand install with rubber lip of seal toward counter bore
in body.
I
IMPORTANT
52. Install smallsnap ring on output shaft against
inner bearing race.
I
53. Installlargeretainingring
used to retain ball
bearingin body.
NOTE: The output shaft must rotate freely by hand.
If it doesn't,recheck
bearing installation.
Motor Rotor-Installation
50. Install output shaft into body, protecting shaft
seal lip from keyway and snap ring grooves.
I
Supportoutputshaft
from underneath body
so that cross pin in output shaft is tight against
body.
Wide
Rubber
Band
Motor
Rotor
Assy.
Use a solid block (steel or hardwood) 2 inches
in diameter by at least 1½ inches long to support output shaft.
FIG. 72
54. Align slot in motor rotor assembly with cross
pin on output shaft and install motor rotor in
body.
55. Remove rubberbandretaining
ball pistons in
their respective bores (if used).
FIG. 70
-23-
58. lightly greasesealing ringand installinto re-
Cover/Body-Reassembly
cess in cover.
59. Install adapter or reservoir in cover by rotating
counterclockwise.
Torque to Approximately 8-12
ft. Ibs.
Start-up Procedure
FIG. 73
IMPORTANT
Be sure torealign
previousscribed
linefor
n
56. Holdmotor rotor assembly in position andinstall body on pintle.
rotor assemblyon pintle
NOTE: Do notforcemotor
as it i s a slip fit and must turn freely by hand.
FIG. 75
57. Install (2) 5/16 x 1¼ socket heatcap screws and
torque to 15 foot pounds.
60, Remove the 3/8 hex headplug to venttransmission. See Page 1 for fluid recommendations.
Reservoir/Adapter-Reassembly
Attached Reservoir
Fill transmission with proper fluid through reservoir
until fluid overflows from opening in body.
Rotate both input and output shafts to purge any
trapped air from transmission. Refill reservoir until
fluid reappears and install hex head plug, Torque to
2-5 Foot Pounds.
Fill reservoir to oil level cold mark.
Separate Reservoir
Fill transmission with proper fluid through customer suppliedseparatereservoir
untilfluid overflows
from opening in body.
Rotate both input and output shafts to purge any
trapped airfrom transmission. Refill reservoir until
fluid reappears and install hex head plug. Torque to
2-5 FootPounds.
Fill reservoir to proper fluid level shown.
FIG. 74
-24-
TRANSMISSION & TRANSAXLE
-26-
TRANSMISSION & TRANSAXLE
NO.
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
DESCRIPTION
REQ’D
Pump & Motor ............................................................................................................................ 1
Bolt 3/8-16X 3 .......................................................................................................................... 4
4
Lockwasher 3/8
..........................................................................................................................
Gasket ...................................................................................................................................... 1
............................................. 1
Spacer ........................................................................................
1
Woodruff Key 1/8 x 1/2 ..............................................................................................................
Gear 12 Tooth .......................................................................................................................... 1
Snapring .................................................................................................................................... 1
Control Plate.............................................................................................................................. 1
Spacer (Short) .......................................................................................................................... 1
2
Washer Spring ........................................................................................................................
2
Washer Friction ......................................................................................................................
Cam Speed Control ................................................................................................................ 1
1
Eccentric Cam ..........................................................................................................................
Eslok Bolt 5/16-18 X 1 ................................................................................................................ 1
Lock Nut 3/8-16 Hi-Tensile........................................................................................................ 2
.. 1
Spacer ..................................................................................................................................
Spacer (Long) ............................................................................................................................ 1
Cam FollowerArm .................................................................................................................... 1
Woodruff Key 1/8 x 1/2 .............................................................................................................. 1
1
Washer 3/8SA€ ........................................................................................................................
1
Eslok Nut 3/8-16 ........................................................................................................................
Transaxle - Peerless Model 1320 ............................................................................................ 1
1
Stop 250 Series Only ..............................................................................................................
..............................................................................................................
1
Grip 250 Series Only
.............................................................. 1
Handle 250 Series Only ...........................................
Spacer 250 Series Only ..........................................................................................................
1
Washer 3/8 250 Series Only....................................................................................................
1
Special Nut 3/8-16 250 Series Only ........................................................................................ 1
-
-
-
-
-
-
-
-
-27-
CONTROL LINKAGE
41
n
0632
CONTROL LINKAGE
DESCRIPTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
Spacer ....................................................................................................................................
RodEnd ..................................................................................................................................
Bolt 1/4-20 X 1 1/2 ....................................................................................................................
Washer 1/4 SAE ......................................................................................................................
E. S. Nut 1/4-20 ......................................................................................................................
Control Rod ..............................................................................................................................
Jam Nut 1/4-28 ........................................................................................................................
Shift Knob ................................................................................................................................
Control Arm ..............................................................................................................................
Bolt 3/8-16X 1 1/4....................................................................................................................
Nut 3/8-16 E.S. ........................................................................................................................
ControlCam ............................................................................................................................
Cam Bearing ............................................................................................................................
E-Ring 1/2................................................................................................................................
Bushing ....................................................................................................................................
Special Washer ........................................................................................................................
Spacer ....................................................................................................................................
Spring ......................................................................................................................................
Washer 5/16 U.S. ....................................................................................................................
Eslok Nut 5/16-18 ....................................................................................................................
Trunnion ..................................................................................................................................
Washer 3/8 SAE .............................................................................. .......................................
Cotter Pin 3/32x 3/4 ................................................................................................................
Washer 5/16 SAE ....................................................................................................................
Rear Brake Rod ......................................................................................................................
Front Brake Rod ......................................................................................................................
Neutral Return Shaft................................................................................................................
Carriage Bolt 3/8-16x 3/4 ........................................................................................................
E.S. Nut 3/8-16 ......................................................................................................................
E-Ring 1/2 ................................................................................................................................
ClutchSpring ..........................................................................................................................
SpringClip ..............................................................................................................................
Bolt 3/8-16X 2 ..........................................................................................................................
Bushing....................................................................................................................................
Spacer ....................................................................................................................................
Parking Brake Lever ................................................................................................................
Grip ..........................................................................................................................................
Spring ......................................................................................................................................
Flange Locknut3/8-16 ..............................................................................................................
Spacer ....................................................................................................................................
BlockPivot ..............................................................................................................................
Carriage Bolt 5/16-18x 1 3/4....................................................................................................
Special Washer ........................................................................................................................
BrakePedal ............................................................................................................................
Shaft ........................................................................................................................................
Cotter Pin 5/32 x 1 ..................................................................................................................
-29-
NO.
REQ’D
2
2
2
2
2
1
1
1
1
1
1
1
1
1
2
3
1
1
2
6
1
3
3
5
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
6
4
1
1
1
1
CLUTCH LINKAGE
3
4
27
28
19
22
-30-
CLUTCH LINKAGE
NO.
REQ’D
DESCRIPTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
25
26
27
28
...................................................................................
Lever 200 Series Only ........................
Spacer (1 Requiredon 250-Series) ............................................................................................
Bolt 3/8-16 x1 200 Series Only ................................................................................................
Eslok Nut 3/8-16 - 200 Series Only ..........................................................................................
Knob #10-24 200 Series Only..................................................................................................
Knob 200 Series Only..............................................................................................................
Screw #10-24 x 1 1/4 200 Series Only ....................................................................................
Rod 200 Series Only................................................................................................................
Washer 3/8 SAE 200 Series Only............................................................................................
Cotter Pin 1/8x 3/4 - 200 Series Only........................................................................................
Eslok Nut 3/8-16 200 Series Only ............................................................................................
Idler Pulley ................................................................................................................................
Idler Arm ....................................................................................................................................
Special Washer..........................................................................................................................
Idler Pulley ................................................................................................................................
Special Screw 3/8-16
x 2 3/4......................................................................................................
Idler Arm Support ......................................................................................................................
Carriage Bolt5/16-18 x 5/8 ........................................................................................................
Eslok Nut 5/16-18......................................................................................................................
Torsion Spring ..........................................................................................................................
..........................................................................................................................
Lockwasher 3/8
Nut 3/8-16 ..................................................................................................................................
Bolt 3/8-16X 3/4 ........................................................................................................................
Washer 3/8SAE ........................................................................................................................
Eslok Nut 3/8-16 ........................................................................................................................
Bolt 3/8-16x 2 .250 Series Only................................................................................................
Special Washer 250 Series Only..............................................................................................
E.S. Nut 3/8-16 250 Series Only..............................................................................................
-
-
-
-
-
-
-
-
-
-
-31
-
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
DRIVE BELT& PULLEYS
6
5
1
3
4
14
11 HP Shown
12.5, 16& 17 HP - Use Other Hole
23
-32-
DRIVE BELT & PULLEYS
DESCRIPTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
TransmissionPulley ................................................................................................................
Woodruff Key 1/8 x 1/2 ............................................................................................................
Fan Blade ................................................................................................................................
Fan Spacer ..............................................................................................................................
Washer ....................................................................................................................................
Nylok Bolt 1/4-20 X 1 ................................................................................................................
DriveBelt ................................................................................................................................
Pulley Bracket ..........................................................................................................................
Spacer ....................................................................................................................................
Flat Idler Pulley ........................................................................................................................
IdlerPulley ..............................................................................................................................
Carriage Bolt 3/8-16x 1 1/2......................................................................................................
Washer 3/8 SAE ......................................................................................................................
Eslok Nut 3/8-16 ......................................................................................................................
Belt Retainer 200 Series Only ................................................................................................
Tube Spacer ............................................................................................................................
EnginePulley ..........................................................................................................................
Sq.. Key 1/4 x 5/8 ......................................................................................................................
Eslok Bolt 7/16-20 x 1 - 200 Series Only ..................................................................................
Bearing Race 200 Series Only ..............................................................................................
Special Washer 200 Series Only ............................................................................................
Mower Drive Pulley 200 Series Only ......................................................................................
Needle Bearing- 200 Series Only ..........................................................................................
Oil Seal 200 Series Only........................................................................................................
-
-
-
-
-
-
-33-
NO.
REQ’D
1
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
2
24
REPAIR OF EATON HYDROSTAT IC TRANSMISSIONS
IS INTENDED FOR OUT-OF-WARRANTY TRANSMISSIONS ONLY
Hydrostatic Transmission
-34-
EATON MODEL 7 HYDROSTATICTRANSMISSION
ITEM
PART
NUMBER
DESCRIPTION
Qty
HYDROSTATICTRANSMISSION
1
2
3
5
6
112621
1 12589
1 12590
1 1259 1
1 12592
12625
8
9
10
*11
12
*
12593
12594
12595
12626
1 12627
*13
14
15
16
22
1
1
1
1
1
*
12628
12629
12596
12597
12630
1 12634
23
24
25
26
27
28
*29
30
*31
32
*
33
35
36
37
38
39
40
41
42
1 12599
1 12600
1 12601
1 12602
1 12603
1 12604
112631
1 12632
1 12633
1 12605
1 12606
1 12607
1 12608
1 12609
112610
11261 1
112612
112613
112614
* i n d i c a t e s NOT
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Reservoir Adapter
Reservoir Cover
Reservoir Body
Square Cut Seal Ring ( i n c l u d e d i n item 57)
Cover S e r v i c e K i t (includes Pivot Pin Dowel.
ControlShaft Dowel, & items 8, 9, 28, 32 & 33)
used on models w/o dump valve
Cover Service K i t (includes Pivot Pin Dowel.
Control Shaft Dowel. & items 8, 9, 28, 32 & 33)
used on models w/ dump valve
External Retaining Ring ( i n c l u d e d i n item 6)
Control Shaft Washer ( i n c l u d e d i n item 6)
...................
....................
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.......
button.........................................
“O” Ring F i t t i n g Guide (includes item 12) .......
Dump Valve Bracket “O” Ring ( i n c l u d e d i n
item 11 & 57) ...................................
Bracket And P i n s ................................
Dump Valve Spring ...............................
Square Cut Seal Ring ( i n c l u d e d i n item 57) ......
Pump Rotor & B a l l s ..............................
P i n t l e - Used i n CCW (counterclockwise
r o t a t i o n t r a n s . (includesPiston. Backup
Ring. “O” Ring. & items 36, 37, 38 & 39) ........
P i n t l e - Used i n CW (clockwise r o t a t i o n )
.
t r a n s ( i n c l u d e s P i s t o n . BackupRing.
“O” Ring. & items 36, 37, 38 & 39)
Motor Rotor & Balls (also includes items 40)
Retaining Ring
Snap Ring
Ball Bearing
Input
Input Shaft
O i l Seal ( i n c l u d e d i n item 6 & 57)
Dump Valve “O” Ring ( i n c l u d e d i n item 57)
Nut Gasket Subassembly (included i n item 57)
Dump Valve
O i l S e a l ( i n c l u d e d i n item 6 & 57)
Control Shaft K i t ( i n c l u d e d i n item 6)
Cam Ring I n s e r t
Coil Pin (included in
item 22)
Check Valve Body ( i n c l u d e d i n item 22)
Grade 200 Ball 5/16 O.D.
( i n c l u d e di n item 22)
Retaining Ring ( i n c l u d e d i n item 22)
P i s t o n S p r i n g ( i n c l u d e d i n item 23)
“O” Ring Plug Subassembly (includes
item 42)
Tube F i t t i n g “O” Ring ( i n c l u d e d i n item 41 & 57)
on a l l modeis
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-35-
1
1
1
1
X
X
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
5
1
1
EATON MODEL 7 HYDROSTATICTRANSMISSION
1
14
22
REPAIR OF EATON HYDROSTAT IC TRANSMISSIONS
IS INTENDED FOR OUT-OF-WARRANTYTRANSMISSIONSONLY
Hydrostatic
Transmission
-36-
EATON MODEL 7 HYDROSTATICTRANSMISSION
ITEM
PART
NUMBER
DESCRIPTION
Qty
HYDROSTATICTRANSMISSION(CONT'D)
51
54
57
112615
1 12623
112616
112618
58
112619
59
1 12620
.......
.............................
Keyed Output S h a f t( i n c l u d e di n
item 59).
SplinedOutputShaft(includedin
item 59)......
Socket Hd. Capscrew
Overhaul Sealing K i t (includes Dampening Piston
“O” Rings, Dampening P i s t o n Backup Rings,
Output Shaft O i l Seal, Plug “O” Ring & items 5,
1 1 w/12, 15, 28, 29, 30, 32 & 42)
Cam RingSubassembly ( i n c l u d e s Pump Race & Cam
Ring)
Body Subassembly (includes Body, O i l Seal,
Output Ball Bearing, Snap Ring, Retaining Ring,
Motor Race & item 51 Keyed Output Shaft).
Body Subassembly ( i n c l u d e s Body, O i l Seal,
Output Ball Bearing,SnapRing,RetainingRing,
Motor Race & item 51 SplinedOutputShaft)....
Model 7 Hydrostatic Transmission Repair Manual..
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-
1 12624
60
740315
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1
1
2
X
1
1
1
X