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MAINTENANCE
SERVICE PROCEDURE
ADJUST PARKING BRAKE
WARNING
When carrying out the adjustment, raise the air pressure high enough to prevent the parking brake from being applied
automatically, and hang a warning sign on the parking brake switch to prevent any other person from operating it.
Never put any oil or grease on the surface of the pad or disc.
If the parking brake effect is poor, adjust as follows.
1.
Check that the air pressure gauge is in the green range, then
release the parking brake.
2. Turn bolt (1) clockwise to bring pad (2) into tight contact with
disc (3).
3.
Turn bolt (1) back 2/3 turns (4 clicks) in the counterclockwise
direction.
Measure the thickness of the pad, and if it is less than 1.5 mm (0.06
in), contact your Komatsu distributor to have it replaced.
When making the first adjustment after replacing the pad, turn bolt
(1) turn (6 clicks) in the counterclockwise direction.
After adjusting, check the braking capacity of the parking brake.
See "CHECK BRAKING CAPACITY OF PARKING BRAKE
(PAGE 4-52)". If the machine moves, contact your Komatsu
distributor for inspection.
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