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SAO TRANSMISSION
DESCRIPTION
The Westerbeke Paragon manually operated reverse gear units consist of a
multiple disc clutch and a planetary reverse gear train.
The units are self (:on-
tained and are independent of the engine lubrication system.
OPERATION
On
the forward drive, the reverse gear case and multiple disc clutch are locked
together as a solid coupling.
The multiple disc clutch is locked or clamped by the
pressure produced when the shift lever is moved to the forward position.
Thus the
propeller shaft turns in the same direction as the engine.
The reverse drive is obtained by clamping the reverse band around the reverse
gear case which contains the planetary reverse gear train.
The reverse band is
clamped when the shift lever is moved and held in the reverse position.
The
reverse motion is then obtained by driving through the gears thus turning the pro-
peller shaft opposite to the engine rotation.
With the shift lever in the neutral position the multiple disc clutch and the reverse
band are unclamped and the planet gears run idle and the propeller shaft remains
stationary.
It is desirable to start the engine with the transmission in neutral, thus avoiding
moving the boat in either direction.
It
is recommended that the shifting be done at speeds below 1000 RPM and prefer-
ably in the 800 RPM range or lower to prolong the life of the engine, transmission
and of the boat.
TROUBLE SHOOTING
The trouble shooting charts below and on the next page should be studied and the
suggestions carried out prior to any disassembly to determine as
well
as pOGsible
what the trouble may be.
Also, the exploded views and the accompanying discus-
sions should be carefully read and understood so that any or
all
of the service work
as indicated from the trouble shooting charts may be carried out properly.
DISASSEMBLY OF SAO TRANSMISSION
As in any servicing operation, cleanliness is a must and all rules for good work-
manship apply. Some of these rules are as follows:
1.
Use only clean fluid in any cleaning or washing of parts.
2.
Use only clean oil for lubrication when pressing parts together.
3.
Never use a hammer to drive ball bearings in place.
4.
Never press a ball bearing so that the force is carried through the balls.
5.
Use only properly sized wrenches in removing or securing nuts and cap-
screws.
6.
Replace gaskets and "0" rings with new materia1.
7.
Work on a clean bench and protect gear teeth and oil seal surfaces from
nicks and scratches.
NOTE:
Remove the reverse and reduction gear as a complete unit before removing the
oil to avoid fouling the bilges.
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