Komatsu ecot3 Operation And Maintenance Manual page 298

MAINTENANCE
If lock pin (2) and rubber pin lock (3) are used in the condition below, it will cause tooth (1) to come off during
operation. Always replace them with new parts.
The lock pin (2) is too short.
Dimension (B) is 1/3 or more of dimension (A) when locking pin
(2) is aligned with bottom face (C).
Rubber (6) of the rubber pin lock is cut and the steel ball is about
to come out.
Steel ball (7) sinks in when it is pushed by hand.
5. Clean the surface of adapter (4) and remove the soil with a knife.
6. Use your hand or a hammer to push rubber pin lock (3) into the
hole of the adapter (4).
When doing this, be careful that the rubber pin lock (3) does not
fly out from the adapter surface.
7. Clean the inside of teeth (1), then install it to adapter (4). If there is mud affixed to it or if there are protrusions,
the teeth (1) will not enter the adapter properly, and there will not be proper contact at the mating portion.
MAINTENANCE PROCEDURE
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