Westerbeke WPDS-20 Technical Manual page 92

1. Fit the bearing (36) and the gear wheel
(37), also press the shaft into the housing.
2. Fit the gear wheel (31) with bearing (34)
into the housing (33).
3. See Fig. 2. Fit together the shaft (42),
bearing (39), cover (43) and the flange
(44) into one unit.
Th~
blJII bearing (39)
is fitted so that the recess on one side of
the bearing (Fig.7) faces opposite the
teeth on the shaft (42). If the sealing ring
in the cover (43) shows the least sign of
damage or if it has been removed from the
cover, itshould be replaced bya new one.
A protecting sleeve shouldbe used to pre-
vent damage to the sealingring by the pas-
sage of the keyway in the shaft (42).
4. See Fig. 2. Fit the shaft unit into the
housing (33). Take care to ensure that the
gear wheel on the shaft (42) meshes with
both gear wheels (37 and 31).
5. See Fig. 2. Fit the needle bearing (35).
6. Fit the cone (28) in the gear wheel (31).
7. Fit togetherthe bearing support (27), bear-
ing support (27), bearing (29), cover (24)
and the gear wheel (30) into one unit and
and tighten on the cover (24). The ball
bearing is fitted so that the recess one side
of the bearing faces away from the teeth
on the gear whee I (30). The bearing sup-
port (27) and the washer are fitted so that
the middle throu!=lh hole comes upwards.
8. Place the unit in the cone (28).
9. Fit the shaft (17) and the sleeve (20) onto
the cone (28).
10. Fit the reverse gear housing (32) over the
assembled parts and tighten it onto the
housing (33).
11. Fit the rubber protector (18) and the coup-
Ii ng flange (10). Before fi tti ng c hec k that
the bolt (12) is well tightenedandthat the
key (15) is properly bedded down in its key-
way in the shaft (17).
S.27
12. Fittheflange(9), shaft (1), locking plung-
er (8), sleeve (4), spring (5) and the plung-
er housing (6). Oil the parts liberally be-
fore fitting. The flange (9) is fitted so that
its sides marked
"0"
follow the lonoitudin-
a I direction of the engine. Fit the reverse
gear lever and check the movements of the
lever from neutra I to "Ahead" and" Astern"
positions respectively, which should be
equi-distant. If the movement in one dir-
ection is appreciably more than in the other
direction, this is to be adjusted by turning
the flange (9). This is shaped such that the
center of the rectangular portion is offset
in relation to the center of the cylindrical
portion (guide). If the flange is fitted so
that the projecting side faces forwards, the
movement of the reverse gear lever from
the "Ahead" position to "Neutral" is de-
creased. If theflange is turned half a turn
so that the projecting side faces aft, the
movement of the lever from !lI'Jeutral" to
the "Astern" position is decreased.
Then c heck that the reverse gear engages
in both the "Ahead" and !lAstern" positions.
13. Fit thereversegearto the engine. Regard-
ingthe reverse gear withratio 1.9 :1, fit-
ting is faci litated if the rubber bushings on
the driving studs (45) as we II as the holes
for these in the engine flywheel, are care-
fully coated with talc.
1. Spring housing
2. Interlock pin
3. Control shaft
4. Cover
5. Flange
6. Bearing hO'.lsing
7. Reverse gear
housing
Fig.
3.
Rear section of reverse gear