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MAINTENANCE
Increasing Track Tension
Prepare a grease pump.
1. Pump in grease through valve (1) using a grease gun.
2. To check that the tension is correct, move the machine
slowly forward and in reverse.
3. Check the track tension again, and if the tension is not cor-
rect, adjust it again.
4. Continue to pump in grease until (A) becomes 148 mm. If
the tension is still loose, the pin and bushing are exces-
sively worn, so they must be either turned or replaced.
Contact your Komatsu distributor for repairs.
(B): Grease cylinder
Loosening Track Tension
It is extremely dangerous to release the grease by any method except the procedure given below.
If track tension is not relieved by this procedure, contact your Komatsu distributor for repairs.
1. Loosen plug (1) gradually to release the grease.
2. Turn plug (1) a maximum of one turn.
3. If the grease does not come out smoothly, move the
machine forwards and backwards a short distance.
4. Tighten plug (1).
5. To check that the tension is correct, move the machine
slowly forward.
6. Check the track tension again, and if the tension is not cor-
rect, adjust it again.
WARNING
MAINTENANCE PROCEDURE
4-29
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