Komatsu Utility PC26MR-3, Operation & Maintenance Manual

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MAINTENANCE PROCEDURES
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REDUCING THE TRACK TENSION
DANGER
q
It is extremely dangerous to let the grease out following any procedure different from those illustrated
below.
q
If the track tension cannot be reduced with this operation, contact your Komatsu Dealer, who will pro-
vide for the necessary repairs.
1. Gradually loosen the grease valve (1) to let the grease out;
do not give the valve more than one turn.
2. If the grease does not come out smoothly, move the machine
slowly forward and backward covering a short distance.
3. Tighten the valve and remove any trace of grease.
4. Move the machine forward and backward, then stop it and
make sure that the track tension is correct.
IMPORTANT
q
The degree of wear of pins and bushings varies depending
on the work conditions and on the characteristics of the
ground.
It is therefore necessary to check the track tension fre-
quently, in order to ensure that it is always correct.
q
When working on rocky or very irregular surfaces, increase the track tension in order to prevent stones
or debris to get stuck between the tracks and the sprocket; on the other hand, reduce the track tension
when working on soft or muddy ground, since the soil penetrates between rollers and tracks and tends
to increase the tension.
4.9.1.h CHECKING THE RUBBER TRACKS
Change the rubber tracks when they reach the indicated wear limits.
1.
When the height “A” of the rubber claw is less than 5 mm: in
this case, in fact, the track may slip and its traction force be
reduced..
1- Roller
2- Rubber track
2. When the steel core is visible in two or more points of the
track.
RWA06560
A
1
2
RYA07510