Komatsu PC138US-11 Operation & Maintenance Manual page 343

Hydraulic excavator
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MAINTENANCE
6.
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.
7.
Clean the inside of tooth (1), then install it to adapter (4).
If there is mud affixed to it or if there are protrusions, the
tooth (1) will not enter adapter (4) properly, and there will
not be proper contact at the mating portion.
8.
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
tooth (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 drive
the pin in.
There is sticking matter (C) which prevents tooth (1) from
fitting into adapter (4) perfectly.
Find out remove the sticking matter and fit tooth (1) into
adapter (4) sufficiently, and then drive lock pin (2).
9.
Insert lock pin (2) in the pin hole in tooth (1), and drive it in
so that the top surface of lock pin (2) is the same height as
the surface of tooth (1).
10. After replacing a bucket tooth, always check the following.
After lock pin (2) is driven in completely, it is secured by tooth (1) and surface.
Lightly hit lock pin (2) in the reverse direction from which it was hit in.
Lightly hit the tip of tooth (1) from above and below, and hit its sides from right and left.
Rubber pin lock (3) and lock pin (2) are set as shown in the figure.
REMARK
If tooth (1) is turned, the wear will become uniform. This will extend the service life of the tooth and reduce the
frequency of replacement.
When replacing tooth (1), replace rubber pin lock (3) and lock pin (2) with new ones as well. This will prevent
tooth (1) from falling out.
WENAM00111
MAINTENANCE PROCEDURE
4-27

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