Komatsu PC118MR-8, Руководство по эксплуатации и обслуживанию

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MAINTENANCE
MAINTENANCE PROCEDURES
4-29
CHECKING AND ADJUSTING THE TRACK TENSION 4
The pins and bushings of the undercarriage wear out to different degrees, depending on the work conditions and
on the characteristics of the surface on which the machine works. Therefore it is necessary to check the track
tension frequently and to adjust it when necessary.
NOTICE
To carry out the check and the corresponding maintenance operation, stop the machine on firm and level
ground. Check both tracks.
Checking the cartridge
1. With the engine idling, move the machine forward of a
distance corresponding to the length of the track on the
ground, then lower the equipment to the ground and stop
the engine.
2. Choose a perfectly flat bar (3), long enough to cover the
distance between the idler roller (1) and the track sliding
roller (2), then position it on the track.
3. Measure the maximum deflection between the upper
surface of the track and the lower surface of the rod.
q
Standard deflection: the deflection value “a“ should be
included between 10 and 30 mm.
If the track tension does not correspond to the standard value,
adjust it by proceeding as indicated below.
Adjustment
DANGER
q
The grease contained in the hydraulic cylinder is
pressurized. Do not give the grease valve (4) more
than one turn when loosening it; if the valve is
loosened excessively it may be pushed out due to the
grease pressure and this is very dangerous for the
operator.
q
Do not loose any component apart from the valve (4). If
t h e t rac k t en sio n d oe s n o t d ecre ase a ft er t h is
operation, contact your Komatsu distributor.
CAUTION
If the resistance met when injecting the grease is
excessive, move the machine forward and backward
covering a short distance.
WEAM014802