Komatsu 170-3 Series, Руководство по ремонту, Страница: 453 / 454

170-3 SERIES
15-47
REPAIR AND REPLACEMENT OF PARTS
REPLACING CAMSHAFT GEAR
1. Removal of gear
Set the camshaft assembly on the press stand,
then push the camshaft to remove the gear
k
When setting the camshaft assembly on the
press stand, be careful not to get your fingers
caught between the press stand and the gear.
2. Press fitting gear
1) Check the gear mounting surface, key
groove, and flange surface, and if there are
any scratches, correct them with an oilstone.
2) Knock a new key into the key groove of the
shaft.
3) Assemble the thrust plate.
4) Heat the gear for the specified time at the
specified shrink-fitting temperature.
a
Gear shrink-fitting temperature: 200
°
C
Heating time: Min. 30 minutes
5) Put the timing mark of the gear on the out-
side, then use a hitting tool to press fit until
the side face of the gear is in close contact
with the camshaft flange.
a
Knock in quickly before the gear becomes
cool.
(7)
REPLACING CAMSHAFT GEAR
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