Westerbeke W-46 - Page 37

INSPECTION/REPAIR
4. If the idler shaft must be
replaced, use the idler shaft
puller for removal, as
illustrated. When installing
the replacement shaft, the oil
holes must be properly aligned.
5. Inspect the timing gear as
follows:
a. Camshaft gear.
Replace the gear if teeth
show evidence of flaking or
excessive wear, or if the
keyway is galled, worn or
disfigured. Make certain
that the camshaft gear, when
mounted on the camshaft, has
no more end play than 0.4mm
(0. 0157 in.) To check the
end play, use a dial gauge.
If the reading exceeds the
repair limit, replace the
thrust plate (Important:
this gear is shrink-fitted
to the camshaft).
Specifications
Unit: mm (in.)
Item Standard
Repair
limit
Camshaft end play
0.05- 0.112
0.3
(0.00197- 0.00441)
(0.012)
b. Injection pump drive gear.
Idler shaft puller
Part #36515
Removing idler shaft
!-Crankcase
2-Puller
3-S tud (HlO)
4-Idler shaft
5-Nut
5
_l)==="o=:
Inspect the gear teeth for damage and condition of the mounting
bolt holes. Replace the gear if observed to be damaged.
c. Crankshaft gear.
Replace the gear if teeth show signs of defective tooth con-
tact, excessive wear or other defects.
d. Idler gear.
Inspect the idler gear teeth and, when necessary, replace the
gear.
6. Inspect the gear case for cracks and for evidence of oil leakage
at the part ahead of the crankshaft. A cracked case must be
replaced. Inspect the crankshaft· pulley. Examine condition of
the surface in contact with the ,.oil seal and check the keyway
and key for wear. Replace the pulley if found defective.
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