Komatsu PC27R-8 Operation & Maintenance Manual page 145

ADJUSTMENT
DANGER
The grease contained in the hydraulic cylinder is under
pressure. For this reason, do not loosen the greasing
valve (1) giving it more than one turn; if the valve is loos-
ened excessively, it may be pushed out due to the grease
pressure and this is very dangerous for the operator.
Do not loosen any other component apart from the valve
(1).
If you notice excessive resistance while injecting grease,
slowly move the machine forward and backward for a
short distance.
1 - To increase the tension, carefully clean the greasing valve (1)
and inject grease through the greaser (2) until reaching the
desired tension.
2 - To reduce the tension, gradually loosen the greasing valve
(1) to let the grease out; do not give the valve more than one
turn.
Use a 19 mm hexagon spanner.
3 - If the grease does not flow out freely, move the machine
slowly forward and backward for a short distance.
4 - Tighten the valve and remove any trace of grease.
5 - Move the machine forward and backward, stop it and check
the track tension again.
6 - If the rubber track tension is not sufficient even after the in-
jection of grease, change the track or the idler seals.
For these operations, contact your Komatsu Utility Dealer.
IMPORTANT
The wear of the rubber tracks varies according to the
work conditions and to the characteristics of the ground
on which the machine is operated.
Therefore, it is necessary to check the track tension fre-
quently, in order to keep it constant.
After the installation of new tracks, it is advisable to carry
out a first check after 30 hours of operation.
MAINTENANCE PLAN
2
1
RWA09320
143