MAINTENANCE PROCEDURE MAINTENANCE
4-34
4. When adjusting the track tension, it is possible to pump in
grease until protrusion (B) of grease cylinder plunger(4) is
35-190 mm. If the tension is still weak, there is excessive
wear of the pins and bushings, so turn or replace the pins
and bushings. Please ask your Komatsu distributor to
carry out repairs.
The protrusion of grease cylinder plunger is set between 30 to
45 mm at shipment from factory.
When Loosening Tension
Always use the following procedure. It is extremely dangerous to use any other procedure to release the
grease.
If the track link does not become loose, ask your Komatsu distributor to carry out repairs.
1. Loosen plug (1) a little at a time to release the grease.
2. Loosen plug (1) a maximum of 1 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 correct tension has been achieved, move
the machine backwards and forwards.
6. Check the track tension again, and if the tension is not cor-
rect, adjust it again.
Releasing internal pressure in Hydraulic Idler Cushion (HIC) circuit
Hydraulic Idler Cushion (HIC) circuit is closed circuit with high pressure grease. When removing HIC equipment or
detaching piping, please release internal pressure in the circuit in accordance with “RELEASING INTERNAL
PRESSURE IN HYDRAULIC IDLER CUSHION (4-61)“.
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