16. TROUBLESHOOTING 16.2.3 RELEASING PARKING BRAKE Please ask your Komatsu distributor to release the parking brake. WARNING Stop the machine on a flat surface when releasing the parking brake, and check that the surroundings are safe. In emergen- cies or when the parking brake must be released on a hill, block the tires carefully before releasing the brake. When the parking brake is released, no braking force can be applied, so check carefully that the situation is safe when moving the machine. The parking brake is released by the accumulator oil pressure of the brake.
If the accumulator pressure is lowered for some trouble, however, release the parking brake mechanically, then tow the machine. 1. Turn adjustment screws on the side of the slack adjuster (Turn A clockwise and B counterclockwise) to retract rod 2 of spring cylinder 1 fully into spring cylinder 1 to loosen plate 3 . 2. Turn adjustment screws further (Turn A clockwise and B counterclockwise) by 1/2 turn. This release the parking brake. 16.2.4 EMERGENCY TRAVEL OPERATION The normal gear shifting operation is carried out by electric signals. If there should be a failure in the electrical system and the machine does not move, it is possible to move the machine by using the following procedure.
NOTICE Always request your Komatsu distributor to carry out the emer- gency travel operation, or consult your Komatsu distributor before carrying it out yourself. 2-90