W-O CARBURETER - The Carburetor Shop

Form 3359
April. 1939
CARTER CARBURETOR CORPORATION.
T. LOUIS, MO. U. u. A.
1939 W-O Circuit
Service Procedure
Reprinted July. 19.39
SERVICE PROCEDURE
W-O CARBURETER
A fast, simple, Circuit method of servicing Carter W-O Carbureters. Use Carter Tool Kit. BE ACCURATE.
\.
Remove choker link pin
spring. c h 0 k e r connector
link and spring.
.Jr
7.
Remove nozzle passage
plug and gasket assembly.
nozzle retainer plug and
nozzle.
To remove nozzle, use tool
TI09-55.
2.
8.
Remove air horn assembly
with all parts attached.
Remove low speed jet plug
and gasket assembly. and
low speed jet.
3.
9.
Remove throttle shaft arm
and screw assembly and
throttle connector rod.
Remove pump jet passage
plug and gasket assembly.
and pump jet.
4.
10.
Remove bowl cover with
all parts attached.
Remove metering rod jet
and gasket assembly.
5.
n.
Remove idle adjusting
screw and spring.
Disassemble fl an g e fr 0 m
body and remove insulator
and gaskets.
6.
12.
Remove idle well plug and
gasket assembly. and idle
well jet.
Remove strainer passage
plug and gasket assembly.
strainer and intake and
discharge ball check as­
semblies.
Oopyrigh t 1939
hy Oarter Oarhuretor Corpora lion
CARTER CARBURETOR CORPORATION, ST. LOUIS, MO, U. S. A
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13.
19.
Remove idle port rivet plug.
Group all high speed sys­
tem parts.
14.
20.
Remove throttle valve
screws. throttle valve and
throttle shaft and lever as­
sembly.
Group all
parts.
pump system
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I
0010
.,
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15.
Remove all parts from air
horn and dust cover as­
sembly.
21.
Group
parts.
all
choke
system
(See note at boltom o[
page.)
16.
Disassemble all parts from
bowl cover.
Clean all castings
oughly, inside and
with a small brush
clean gasoline. Then
out all passages with
pressed air.
thor­
out,
and
blow
corn·
22.
Install bowl cover gasket.
Check bowl cover [or warp­
age and wear on counter­
shaft pin.
TO REASSEMBLE
I)
..-...-11
17.
23.
Group all parts controlling
gasoline level.
Install needle sea t and
gasket in bowl cover.
If needle shows groove on
sealing sur f ace. replace
both needle and seat.
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18.
24.
Group all idle system parts.
Install needle in seat. then
install float and lever as­
sembly.
Check float for dents and
wear on lip, and float pin
fOJ wear.
Note: Examine each part in each group and replace those parts that shows signs 01 wear or damage. If any carbon is in
the bore of the !lange, remove it by scraping, or with sandpaper (do not use emery cloth). Install all parts tight Use all
new gaskets.
CARTER CARBURETOR CORPORATION, ST. LOUIS, MO, U. S. A .
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25.
Set noat level.
31.
Assemble flange to body.
Turn gasket a r 0 u n d so
gauge can be placed on
machined surface of cast­
ing. Adjustment is obtained
by bending lip of float
which contacts needle. Do
not bend front of float as
damage will result. When
holding bowl cover in nor­
mal position, free end of
float should have minimum
drop of 112". Adjustment is
made by bending small
float-stop lips at anchored
end of lIoat.
Use new gaskets. Lin up
holes in body casting with
holes in insulator, gaskets
and flange before tighten­
ing screws. Don't forget
lock washers.
32.
Install low speed jet. and
low speed jet plug and
gasket assembly.
Work jet well inlo seal by
moving back and forth to
insure a good seaL
26.
Install pump jet and pump
jet plug and gasket as­
sembly.
27.
33.
Install discharge and in­
take ball check assembly.
strainer. and strainer plug
and gasket assembly.
Install idle well jet. and
idle well plug and gasket
assembly.
28.
34.
Install pump spring. and
pump plunger and rod as­
sembly.
Install metering rod jet and
gasket assembly.
Examine jet and metering
rod for wear. If ei,ther shows
signs of damage, replace
both.
29.
Install throttle shaft and
lever assembly and throttle
valve.
After installing lever, back
out throttle lever adjusting
screw. Then install valve
with small "c" toward idle
port opening and facing
manifold sid e of flange.
With valve screws loose,
tap throttle valve lightly to
cen tralize it in bore of car­
bureter. Hold valve in place
w~th fingers and securely
tighten screws. Always use
new screws.
35.
Install bowl cover as as­
sembled.
Use new gasket. Tighten
screws evenly and securely.
36.
Install pump arm and col­
lar. and pump operating
lever assembly on pin in
bowl cover.
30.
Install idle ad; ustm en t
screw and spring.
Set screw to specifications.
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CAR·BURErER
Trade )lark Be•. U. S. A. '" Canada
CARTER CARBURETOR CORPORATION, ST. LOUIS, MO., U. S. A.
37.
43.
Install pump connedor link.
Install air hom and dust
cover assembly on body.
Ends of lin k should be
away from bore with pin
spring at top.
Tighten screws evenly and
securely.
38.
Install throttle shaft arm
and s ere w assembly on
throttle shaft.
Then install throttle con­ nector rod u sin g new
spring and ret a i n e r at
lower end and pin spring
at top end. Examine throttle
connector rod and throttle
shaft arm for signs of wear.
Centralize val vein air
horn. then securely tighten
screws. Always use new
screws. Then attach choker
pull back spring.
39.
45.
Adjust pump stroke.
Install choke tube bracket
assembly.
Install choker control lever
and shaft assembly, and
choker valve anembly.
(See note at bottom of
right hand column.)
Connect choke pull back
spring.
40.
46.
mustration shows proper
method of bending throttle
connedor rod for pump ad­
justment.
Install c h 0 k e r connector
link. connector link spring
and pin spring.
Pump Adjustment: Back out throttle lever set screw. With
throttle valve seated. pump should travel specified stroke
from closed to wide open position. Adjustment can be made
by bending throttle connector rod at lower angle with tool
Tl09-41 (Fig. 40). Pump travel can be measured by using uni­
versal pump stroke gauge Tl09-117S by placing base of gauge
on raised portion of bowl cover so that projecting ear of pump
gauge rests on top surface of pump shaft. Hold gauge ver­
tical. The difference between the number shown by index
mark on gauge, at wide open and closed positions will be
travel in 64th's.
Metering Rod Adjustment: Install metering pin and spring
assembly, washer and nut loosely on pump operating lever.
Insert gauge in place of metering rod. seating tapered end
in metering rod jet. Hold gauge vertical to insure seating.
With throttle valve seated, push metering rod pin even with
shoulder of notch in gauge and tighten nut (tool Tl09-76).
Remove gauge, and install metering rod. disc and pin
spring. Connect metering rod spring.
41.
Adjust metering rod.
(See note a bottom of
right hand column.)
42.
Install noazle. Donie re­
tainer plug. and noaale
plug and gasket assembly.
Install nozzle with flat side
facing up. Use tool Tl09-55.
Always us. all new gaskets when se rvicing a
Carter Carbureter
t
NO CARBURETER CAN DEUVER GOOD MILEAGE OR
PERFORMANCE UNLESS COMPRESSION IS NORMAL
AND THE MOTOR IS PROPERLY TUNED
CARaURErER
Trade Marl B... U. 8. .L 6; Canada