Komatsu PC2000-8 BACKHOE, Operation & Maintenance Manual

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MAINTENANCE
MAINTENANCE PROCEDURE
4-31
Checking
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 bar (3) on top of the track from No. 2 roller
(1) to No. 3 roller (2).
3. Measure the maximum deflection between bottom surface
of the wooden bar and top surface of the track shoe.
Deflection “a“ should be 10 - 30 mm.
Adjustment
If the track tension is not at the standard value, adjust it in the following manner.
Adjusting Hydraulic Cushion (HIC) Cylinder
1. Check that drain valve (1) is fully closed.
(R) Machine's rear side
2. Set the fuel control dial to a point midway between low
idling (MIN) and full speed (MAX), and run the engine at a
mid-range speed.