Installation manual

VELVET DRIVE TRANSMISSIONS
MAINTENANCE
Transmission maintenance is minimal. Keep the exterior
housing clean, check the fluid level as part of your regular
routine,
anq change the fluid every 300 operating hours.
Periodically inspect the transmission and the cooler for leaks
and co'trosion. Make certain the air vent is clear and when
checking the. fluid level look for sigus of water contamination
(fluid
will appear as strawberry cream).
Lay-upIWinterize
Storage requires special care. Follow these procedures:
D Drain the water from the transmission oil cooler and
replace it with a proper mixture of antifreeze coolant.
NOTE: This operation will usually occur when the engine
raw water cooling system is properly winterized.
D Clean up the transmission and touch-up unpainted areas
(use heat resistant paint).
D Fill the transmission with Dextran III ATF fluid to
prevent internal corrosion. (Extended storage only,
12 months or more).
D Loosen attaching hardware from the transmission
output
flange and propeller shaft coupling flange before
removing the boat from the water. Separate the flanges
and spray with lubricant.
D Inspect the gear shift cable, linkage, and attachments ..
Look for corrosion of the end fittings, cracks or cuts in
the conduit, and bending of the actuator rods. Lubricate
all moving parts.
NOTE: if the transmission is to be stored for a long time
(twelve months or more), it should be topped offwith
fluid
to prevent internal corrosion. Reduce the fluid level
before putting the engine back into service.
OIL COOLERS
The continued flow of raw water through the cooler will, in
time, erode the inside of the cooler causing cross leaks to
occur. These internal cooler leaks will cause one of the
following two problems:
1. Transmission fluid will leak into the flow of raw water
and be discharged overboard through the engine exhaust.
A loss of transmission fluid will cafA,se the transmission to
fail.
2. The raw water will leak into the transmission fluid caus-
ing an increase in transmission fluid. This contaminated
fluid will appear as strawberry cream. The transmission
will eventually
fail.
Either case requires an immediate response:
1. Install a new oil cooler.
2. Refill the transmission with DEXIRON III ATF.
WARRANTY NOTES
Service manuals are available from your BORG WARNER
dealer. For assistance, contact:
Velvet Drive Transmissions
1208 Old Norris Road
Liberty, SC 29657
Tel.: [phone]
www.YelvetDrive.com .
""Ivet Drive is aware of the shock loads that can be placed
on
its gears as the result of mechanical propeller operation or
fully reversing of
the propeller blades while shifting.
Therefore torque loads
and directional changes should be
made at
low engine speeds. If it is found that a failure was
caused by a shock load, any warranty claim will be denied.
A CAUTION: System·related noises or vibrations can
occur at low engine speeds which can cause gear rattle
resulting in damage to the engine and/or transmission.
Velcet Drive is not responsible for total system-related
torsional vibration of this type.
If any problems occur with the transmission, see
TRANSMISSION TROUBLESHOOTING in this manual.
If water has contaminated the fluid, the transmission fluid
needs to be cleaned out and replaced with fresh fluid. It will
take several fluid changes to get rid of the contamination.
Check your dipstick each time until it
appears as pure trans-
mission fluid. Change the transmission filter and clean out
the fluid lines that connect to the cooler.
If the transmission fails to shift properly, it will most likely
need
the attention of a qualified transmission service facility.
A transmission cooler may last ten years or more but, in
some circllffistances, depending on operating hours. tropical
waters, maintenance, etc. it might only last half that time.
WESTERBEKE recommends having a spare cooler aboard.
Engines & Generators
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