V2-10, V2-12, V2-16, V-18, V2-20 Saddle Manual.indd

BOW THRUSTER
V2-10, V2-12, V2-16, V2-18, V2-20
Saddle Housing Installation
Manual
WESMAR Saddle Thruster
Installation Manual
JUNE 2012
Western Marine Electronics
14120 NE 200th Street, Box 7201
Woodinville, WA 98072-4001 USA
T: (425) 481-2296 / F: (425) 486-0909
Email: [email protected]
Web: www.wesmar.com
Installation
Table of Contents
Introduction............................................................................................4
Bow Thruster Tube Instalation .................................................................
5
Hull Fairings (Optional) ..........................................................................
7
Thruster Mounting ...................................................................................
8
Oil Reservoir ............................................................................................
9
Flexible Coupling Alignment
.................................................................
10
System Troubleshooting Notes .................................................................
11
WESMAR
Page 3
Electric Thruster
Introduction
This manual has been created as an aid to understanding WESMAR bow thrusters, and to provide some
helpful tips. Use it only as a guide. For saddle stern
thrusters, see the seperate saddle stern manual. Installations should be performed by a professional boat
yard or a competent marine service yard.
One feature that distinguishes our bow thrusters from
the competition is that all WESMAR drive legs are
stainless steel, and a sacrificial zinc nut is installed
on the propeller shaft to reduce electrolytic corrosion
(Fig. 1).
When you receive your WESMAR bow thruster, you
should find the following equipment:
• Stainless steel bow thruster drive unit
• Stainless steel propeller(s)
• Zinc nut assembly including shaft key and pin
• Mounting flange bolts and washers
• Thruster gasket
• Owner's manual
Figure 1: V2-12 Thruster
Page 4
WESMAR
Installation
Bow Thruster Tube
Installation
Depending on hull material, consult a boat yard or
naval architect prior to installation. WESMAR can
supply fiberglass, aluminum or steel tubes.
Note: For fiberglass tunnels, ensure smooth surface
area prior to seating tube gasket and saddle.
BECAUSE STEEL, AND ALUMINUM TUBES
HAVE DIFFERENT INSIDE AND OUTSIDE DIAMETERS, NOTIFY WESMAR IF YOU WILL USE A
NON-FIBERGLASS TUBE.
Figure 2: The bow thruster must fit completely inside
the tunnel.
Due to ID and OD differences in some steel or aluminum tubes, you may have to build up the bow thruster
saddle or have props cut to a particular dimension.
Check prop clearances before installing tunnel.
Tube Location
For best thruster performance, position the thruster according to the following guidelines:
• Position the tube at least one tube diameter below
the surface of the water. At an absolute minimum,
the distance between the top of the tube and the
surface of the water should be 1/2 the tube diameter.
• Make sure that the tube is between 2 and 6 tube diameters long. At these lengths, no part of the bow
thruster should extend outside the tube (Fig. 2).
Figure 3: The bow thruster tube should have a generous radius where it joins the hull to prevent cavitation.
Family
Tunnel
Prop Size
OD
Wall
ID
• Place the tube as far forward as possible while
maintaining proper tube depth and width.
V-10
10" schedule 40 pipe
9.5" dia
10.75"
.365"
10.39"
V-12
14" schedule 40 pipe
12.6" dia
14.00"
.438"
13.12"
V-16
18" schedule 40 pipe
16.5" dia
18.00"
.5"
17.00"
• To determine bow thruster tube length, be sure you
measure across the widest point of the hull at the
installation site.
V-18
18" schedule 40 pipe
18.0" dia
20.00"
.81"
18.38"
V-20
20" schedule 40 pipe
20.5" dia
22.00"
.5"
21.00"
Family
Tunnel
Prop Size
OD
Wall
ID
V-10
WESMAR Custom
9.49" dia
10.63"
.787"
9.84"
V-12
WESMAR Custom
12.25" dia
14.00"
.625"
12.75"
V-16
WESMAR Custom
16.00" dia
18.00"
.75"
16.50"
V-18
WESMAR Custom
18" dia
20.00"
.75"
18.50"
V-20
WESMAR Custom
20.0" dia
22.00"
.75"
20.50"
• Give the tunnel exit a generous radius to ensure
proper water flow (Fig. 3).
WESMAR
Table 1: Steel and Aluminum Tunnels
Table 2: Fiberglass Tunnels
Page 5
Electric Thruster
Figure 4: Installation of the thruster tube.
Page 6
WESMAR
Installation
Hull Fairings (Optional)
Fairings placed around the bow thruster tunnel may
reduce water resistance. Without a fairng, water is
free to hit the aft wall of the thruster tunnel creating
extra drag, noise, and potentially causing the thruster
to rotate inside the tube (Fig 5A). There are two types
of fairings that can help prevent this from happening.
(A)
1. The best solution is to create a recess in the aft side
of the tunnel so that the inside face of the tunnel is
no longer exposed to incoming water. Frequently,
the recess is angled down to match the shape of the
water flow in this section of the hull (Fig. 5B, 6).
(B)
2. Another effective solution is to create a deflector
that sticks out from the hull on the forward side of
the tunnel. The deflector should hide the aft wall
of the tunnel from the incoming water flow (Fig.
5C, Fig. 7).
Protective bars are sometimes installed to protect the
thruster from debris. These bars should be installed
length-wise on the hull, parallel to the water flow (Fig.
6).
(C)
Figure 5: A. Tunnels without fairings create drag
B. Tunnels with fairing aft of tunnel reduces drag.
C. Tunnels with fairing forward of tunnel
Figure 6: Aft fairing with protective bars.
Figure 7: Forward Fairing.
WESMAR
Page 7
Electric Thruster
Bow Thruster Mounting
Mount the thruster on the tube so the unit is in the longitudinal center. If you cannot mount the unit straight
above the tube, it can be moved down on either side
of the tube up to an angle of 90 degrees (Fig. 8). If
installing the thruster at an angle, the oil fill plug to the
lower leg (located on the flange), must be on the upper
side.
Flange, Gasket and Tunnel
1. Use the supplied stainless steel saddle as a template for your fiberglass, aluminum or steel tunnel.
Cut the tube to the inside dimensions of the flange/
saddle (Fig. 9, 10).
Figure 8: The thruster can be mounted at any angle
90º from vertical.
2. The saddle will become a integral part of the tunnel and should be through bolted using customer
supplied 3/8 - 16 flat head stainless steel bolts and
nuts with locking washers. Nuts should be placed
on the top of the saddle to allow for re-torquing.
3. Dry fit complete system prior to setting it in 3M5200 or similar sealant. Check drive leg mounting;
make sure the props turn freely. The propellor
blades should have all have the same clearnace to
the tunnel walls.
4. To correct for machining and casting tollerances,
an additional gasket may be provided in some
instances to center the output shafts in the
tunnel.
Figure 9: Thruster gasket and flange.
Figure 10: Fiberglass tunnel customer pre-cut to
inside saddle dimensions
Page 8
WESMAR
Installation
Oil Reservoir
An oil reservoir is supplied with V2-10 to V2-20
thrusters (Fig. 11).
The oil fill plug is 1/4-inch NPT (Fig. 12, 13). Located on the drive leg, the oil fill plug is provided to
allow installation of an oil reservoir (Fig. 14). It also
acts as a visual aid for checking gear oil level in the
lower leg.
Install the oil reservoir no more than 2 ft above the
Figure 11: 5 oz. oil reservoir with 1/4" fitting
thruster leg. Use a 5 oz. container filled with SAE
90W gear oil. So not fill oil reservoir with gear oil until vessel is ready to go back into the water.
A customer-supplied gear oil reservoir for models 6and 8-inch V-6 and V-8s series can also be set up for
the thruster. Install the reservoir above the thruster leg
because it is gravity fed. WESMAR can sell above
optional 5 oz. reservoirs.
Oil
Vent
Oil
Fill
Figure 12: Oil fill and vent ports on motor adapter.
Oil fill
Figure 13: Oil reservoir mounting.
Figure 14: Oil fill and vent plugs.
WESMAR
Page 9
Electric Thruster
Flexible Coupling Alignment
The provided shaft couplings have two setscrews in them each. One of these is aligned with the
bore keyway. This setscrew must be tightened down against the key of the given shaft. Align
the coupler halves such that both shafts have setscrews set against their respective keys and that
the coupler halves firmly together about the hytrel insert. If a setscrew cannot be driven into
its appropriate shaft key then the shaft and coupler alignments must be adjusted to correct this
(Fig. 24, 25).
Note: all setscrews must be tightened down prior to thruster operation.
Figure 24: Improper shaft alignment prevents proper setting of setscrew against shaft key.
Figure 25: Shaft re-aligned to facilitate proper setting of setscrew against shaft key.
Page 10
WESMAR
Installation
System Troubleshooting Notes
WESMAR
Page 11
Electric Thruster
System Troubleshooting Notes
Page 12
WESMAR