. MAINTENANCE SERVICE PROCEDURE CHECK BRAKE DISC WEAR WARNING 4 - 63 When checking the br ake disc wear, apply the parking brake and s ecure the front and rear fra mes with the frame lock b Make sure that the bra ke oil temperature is less than 6 0°C (140°F) before checking the brake If the disc is near the wear limit, carry out inspection a t shorter intervals, regardless of the sp ecified inspection interval When checking the bra ke disc for wear, there are 4 places (fron t axle and rear axle, left and right), so use the s ame procedure to check all 1. Remove cap nut ( 2. Depress the brake pedal and push in rod (2) fu lly. 3.
Amount of wear (A ) is the amount that end face (C) of the rod protrudes from end of protrusion. Permitted wear lim (E) of the rod is in When this point distributor to carry If the disc is n shorter interval interval. face (D) of the guide. Meas ure the amount it (B) of the disc is the point where groove line with end face (D) of the guide. line with end face (D) of the is reached, please ask y our Komatsu out inspection and replacem ent of parts . ear the wear limit, carry out inspection at s, 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 a djusted so t hat the end face of rod ( 2) comes to the end fa ce of guide (3). For this reason, do not loosen locknu t (4) except when replacing the dis c. Carry out the opera tion with two workers: one w orker depresses the brake pedal a nd the other worker pu shes in rod (2).