Check And Adjust Track Tension - Komatsu ecot3 Operation And Maintenance Manual

MAINTENANCE PROCEDURE

CHECK AND ADJUST TRACK TENSION

Wear on pins and bushings of the undercarriage will vary with working conditions and type of soil, so inspect the
track tension every now and then in order to maintain the standard tension.
For carrying out inspection and adjustment of track shoes, park the machine on the flat and solid ground.
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. Put on the track shoe straight wooden bar (3) which stretches
from idler (1) to upper carrier 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 to 30 mm (0.4 to 1.2 in).
If the track tension is not at the standard value, adjust it in the following manner.
Adjustment
There is danger of plug (1) flying out under the high internal pressure of the
grease. Never loosen plug (1) more than 1 turn.
Never loosen any part other than plug (1). Never put your face in the
mounting direction of plug (1).
If the track tension cannot be loosened with the procedure given here,
please contact your Komatsu distributor.
Increasing Track Tension
Prepare a grease pump.
1. Pump in grease through grease fitting (2) with a grease pump.
(Grease fitting (2) forms one part with plug (1).)
2. To check if the tension is correct, run the engine at low idle,
move the machine slowly forward (by an amount equal to the
length of track on ground), then stop the machine.
3. Check the track tension again, and if the tension is not correct,
adjust it again.
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WARNING
MAINTENANCE