. MAINTENANCE SERVICE PROCEDURE CHECK BRAKE DISC WEAR WARNING 4 - 61 When checking the br ake disc wear, apply the parking b rake and secure the front and rear fra mes with the frame lock bar Make sure that the br ake oil temperature is less than 60° C (140°F) before checking the brake wear. cified inspection interval. If the disc is near the wear limit, carry out inspection at s horter intervals, regardless of the spe When checking the br ake disc for wear, there are 4 pl aces (front axle and rear axle, left and right), so use the same procedure to check al 1. Remove cap nut ( 2. Depress the brak e pedal, keep it depressed, and e until contacts the piston. push in the rod (2) of the gaug 3.
The wear is the am ount that the end face of rod (2) is protruding from the end fac protrusion. The point where th guide is the permi If the wear has re distributor for insp If the disc is n shorter interva interval. e of guide (3). Measure the amount of e rod groove is level with the en d face of the ssible limit for the disc wear. ached this point, please ask y our Komatsu nspection at ection and replacement parts. ear the wear limit, carry out i ls, regardless of the specified inspection : 29.4 to 39.2 Nm (3.0 to 4.0 kgm, 21.7 to 28.9 lbft) 4. Install cap nut (1).
Tightening torque REMARK On new machines, the position of the guide is adj usted so that the end face of rod ( 2) comes to the end f ac e of guide (3). For this reason, do not loosen locknut ( 4) except when replacing the dis c. Carry out the oper ation with two workers: one wor ker depresses the brake pedal a nd the other worker p ushes in rod (2).