Komatsu PC12R-8, Operation & Maintenance Manual

Page: 145 / 208

MAINTENANCE PLAN
143
4.7.1.d CHECKING THE STEEL TRACK TENSION
CHECK
ADJUSTMENT
DANGER
•
This operation must be carried out by two operators. One operator must be seated in the cab and oper-
ate the machine according to the instructions of the operator who carries out the check and the adjust-
ment.
•
The track tension must be checked with the frame lifted from the ground; be careful not to move any
control lever while the operator is carrying out the check.
Stop the machine on a firm and level surface, after lowering the
equipment to the ground.
1 - Raise each track by means of boom and arm.
Operate the control levers slowly during this operation.
2 - Measure the distance between the track and the second roll-
er, starting from the sprocket. If the distance is included be-
tween 10 and 20 mm, the tension is normal.
If the value is not included in this interval, adjust the track un-
til reaching the correct value.
RWA06380
10÷20 mm
RWA06530
DANGER
•
The grease contained in the hydraulic cylinder is under
pressure. For this reason, do not loosen the greasing
valve (3) 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 in addition to the
valve (3).
•
If you notice excessive resistance while injecting grease,
slowly move the machine forward and backward for a
short distance.