Komatsu PC138US-11 Operation & Maintenance Manual page 342

MAINTENANCE PROCEDURE
2.
Check that the work equipment is in a stable condition,
then set the lock lever to LOCK position (L).
3.
Use a hammer and bar to drive out lock pin (2).
If the bar is set against rubber pin lock (3) when it is hit,
the rubber pin lock may break. Set it against the back of
the pin.
4.
After removing lock pin (2) and rubber pin lock (3), check
them.
If lock pin (2) and rubber pin lock (3) are used in the condi-
tion below, it will cause tooth (1) to come off during opera-
tion. Check the shape of the parts. If they have any dam-
age, replace them.
• Lock pin (2) is too short.
Dimension (B) is 1/3 or more of dimension (A) when
lock pin (2) is aligned with bottom face (C).
• The steel ball is about to come off.
Rubber (6) of the rubber pin lock is broken.
• The steel ball sinks.
The rubber of the rubber pin lock is deteriorated and
steel ball (7) sinks into it when you press it.
5.
Remove the soil stuck to adapter (4) by using a knife.
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MAINTENANCE