24. SERVICE PROCEDURE 24.5.3 CHECK WEAR OF FRONT DISC BRAKE PADS WARNING If you continue to use the pad after it has passed the wear limit, there is not only risk of damage to the disc, but there is also danger that the brakes will have no effect. When the wear approaches the wear limit, check more frequently and replace the pad at the correct time. On jobsites where there is a large amount of sand or where the foot brake is frequently used, carry out this check every 250 hours. 1. Insert the inspection gauge into the wear inspection hole in the caliper body and check the wear. AE134370 2.
If the stepped portion of the gauge contacts the caliper, the wear limit has been reached (remaining pad thickness: 3 mm (0.12 in)), so replace the pad. Pad Caliper A B Near wear limit Wear limit replace pads Gauge Gauge If the result of the inspection shows that the pad must be replaced, please contact your Komatsu distributor for replacement. The pad wear is not necessarily the same for the left and right wheels, so always check the pads on both the left and right. If any of the pads has reached the wear limit, always replace all eight pads. AE134380 When working on muddy or wet ground, mud may stick to the caliper or disc.
If it is left in this condition, the pad will wear more quickly, so always wash the area thoroughly after finishing opera- tions. 3-62