MAINTENANCE MAINTENANCE PROCEDURE
4-33
Adjust Grease Cylinder
Carry out this adjustment after adjusting the hydraulic cushion cylinder.
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 dis-
tributor.
Before pumping in grease, check that protrusion (A) of
hydraulic cushion cylinder (2) plunger (3) is within the
specified value on both the left and right. Check the pro-
trusion of the hydraulic cushion cylinder again after pump-
ing in grease. If it is not within the correct range, loosen
the plug (1) one turn to release the grease and adjust. If
that protrusion of hydraulic cushion cylinder cannot be
within the specified value, please ask your Komatsu dis-
tributor to carry out adjustment.
q Specified value : 135 ± 5 mm
Do not simply pump grease into the grease cylinder to adjust the track tension without adjusting with the
hydraulic cushion cylinder. An excessive load will be brought to bear on the undercarriage, and there is
danger of damage to the undercarriage.
When Increasing Tension
Prepare a grease pump.
1. Pump in grease through plug (1) with a grease gun.
2. To check that the tension is correct, move the machine
slowly forward.
3. Check the track tension again, and if the tension is not cor-
rect, adjust it again.
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