Westerbeke WPDS-20 Technical Manual page 68

Marine diesel engine/marine diesel generator
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4.
Never press a ball bearing so that the force
is carried through the balls.
5.
Use only properly sized wrenches in re-
moving or securing nuts and capscrews.
6.
Replace gaskets and
110 11
rings with nev'
material.
7.
Work on a clean benc h and protect gear
teeth and oil seal surfaces from nicks and
scratches.
REMOVAL OF REDUCTION GEAR ASSEMBLY
FROM REVERSE GEAR HOUSING
NOTE: To faci litate remova I of the transmis-
sion from the engine,
it is simpler to remove
the reduction gear assembly first.
Make cer-
tain t hat a II of the oi I is removed from the re-
verse and reduction unit before removal is at-
tempted.
1.
Remove capscrews and lockwashers around
flange of reduction gear housing.
2.
Strike gear half coupling flange with soft
mallet to break reduction gear unit from
reduction adapter plate . Slide entire re-
duction unit straight back approximately
3 inches until reduction unitclears reduct-
ion drive gear and lift reduction unit clear
of reverse gear housing assembly.
NOTE: Refer to reduction gearservice manual
for disassembly and assembly of reduction
uni t.
REMOVAL OF REVERSE GEAR HOUSING AS-
SEMBLY FROM ENGINE
1.
Remove capscrews and lockwashers from
f lange of cover
(4) and remove cover.
2.
Remove capscrews and lockwashers that
secure reverse gear housing (6'1) to
f~ont
end plate
(58) or timing gear cover.
S.3
3.
Slide entire reverse gear housing straight
backapproximately 3 inchesuntil housing
is c lear of engine gear (92) and lift re-
verse gear housing assembly c lear of en-
gine.
4.
Remove pilot roller bearing (95) from
engine gear (92) if it remains on engine
gear.
5.
Remove front end plate
(93) from trans-
sion.
6.
Remove engine gear (92) from engine,
following engine manufacturer's recom-
mendati0n, only if necessary to replace.
7.
If necessary to replace, remove oi I seal
(94) from front end plate
REMOVAL OF GEAR CASE ASSEMBLY FROM
REVERSE GEAR HOUSING
REDUCTION MODE L
1.
Remove screw (81) from arm of yoke (79)
and remove ba II joint (80) and lockwash-
er (82) from eye of link on reverse band
assembly.
2.
Loosen capscrews in yoke and remove cross-
shafts (78) from sides of housing being
careful not to damage oi I seals (68) in
housing.
3.
Remove yoke (2)
from operating sleeve
assembly (40) through cover opening in
housing.
4.
Remove reverse band assembly from gear
case assembly from front of housing.
NOTE: On older reverse bands using the drag
link,
it wi II be necessary to remove the
pins that anchor the reverse band to the
housing before removing reverse band from
housing.

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