Komatsu PC490-11, Installation And Instruction Manual

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• The steel ball sinks.
The rubber of the rubber pin lock is deteriorated and
steel ball (7) sinks into it when you press it.
6.
Remove the soil stuck to adapter (4) by using a knife.
7.
Use your hand or a hammer to push rubber pin lock (3) in-
to the hole of adapter (4).
When doing this, be careful that rubber pin lock (3) does
not fly out from the adapter surface.
8.
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 adapter (4) properly, and there will
not be proper contact at the mating portion.
9.
Fit tooth (1) to adapter (4), and check that when tooth (1) is pressed strongly, the rear face of the hole for
the pin of teeth (1) is at the same level as the rear face of the hole for the pin of adapter (4).
If the rear face of the pin hole of tooth (1) protrudes in front of the rear face of the pin hole of adapter (4), do
not knock the pin in.
There is sticking matter (C) which prevents tooth (1) from
fitting into adapter (4) perfectly.
Find out the sticking matter and remove it. Fit tooth (1) into
adapter (4) sufficiently, and then knock in lock pin (2).
10. Insert lock pin (2) in the pin hole in tooth (1), and knock it
in so that the top surface of lock pin (2) is the same height
as the surface of tooth (1).
11. After replacing a bucket tooth, always check the following.
MAINTENANCE MAINTENANCE PROCEDURE
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