Komatsu PC80MR-5E0, Operation & Maintenance Manual

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1) Tighten the bolt in the order shown in the figure.
Tightening torque:
117 to 216 Nm {18 to 22 kgm}
2) Check that the nut and shoe are in close contact with the
link contact surface.
METHOD FOR CHECKING AND ADJUSTING STEEL SHOES AND ROADLINERS
TRACK TENSION
The wear of the pins and bushings of the undercarriage depends on the working condition and soil condition.
Check the track tension occasionally and keep it in the standard range.
Perform check and adjustment on a level and firm ground.
METHOD FOR CHECKING STEEL SHOES AND ROADLINERS TRACK TENSION
1.
Run the engine at low idle, then move the machine forward for a distance equal to the track length on
ground, and slowly stop the machine.
2.
Place wooden block (3) which reaches from idler (1) to
carrier roller (2) on the track.
3.
Measure maximum deflection (a) between the under sur-
face of the wooden block and top surface of the track.
If deflection (a) is in the standard range (10 to 30 mm), the
track tension is correct.
If the deflection is out of the standard range, adjust it into the standard range.
METHOD FOR INCREASING STEEL SHOES AND ROADLINERS TRACK TEN-
SION
Items to be prepared
Grease pump
1.
Pump in grease through grease fitting (4) by using a
grease pump.
MAINTENANCE MAINTENANCE PROCEDURE
4-27
WENAM00241