. OPERATION TROUBLESHOOTING WHEN PARKING BRAKE HAS BEEN ACTUATED IN EMERGENCY METHOD OF RELEASING PARKING BRAKE IN EMERGENCY WARNING NOTICE opposite sides. 3 - 144 If the pressure in th e hydraulic circuit goes down parking brake is aut If it is necessary to u se the towing machine to move the failed m achine , and th e parking brake must be released, use the following me thod to release the brake. After moving the ma chine, please ask your Komatsu distributor t o carry out re other problem Before releasing the pa rking brake, always put block s under the t ires. If the tires a re not bl ocked, the machine may s uddenly move and cause serious per 1.
When releasing the parking brake manually, prepare 20 M12 bolts (distance under head: 65 to 80 mm (2.6 to 3.2 in); thread pitch: 1.75 mm (0.069 in)(coarse thread)) and 20 M12 washers. 2. Prepare a container to catch the oil. 3. Stop the engine. 4. Put blocks under the wheels. 5. Set the container to catch the oil under the brake portion. 6. Remove plug (1) from the rear axle brake portion. REMARK There are 10 plugs on the right side and 10 plugs on the left side. 7. Pass the brake release bolt through the washer and insert it into the plug hole. 1. When releasing the parking brake manually, prepare 20 M12 bolts (distanc e under h ead: 6 5 to 8 0 mm (2 .6 to tch:
1.75 mm (0.069 in)(coarse t hread)) and 20 M1 2 wash 2. Prepare a conta 3. Stop the engine. 4. Put blocks unde 5. Set the containe r to catch the oil under the brake portion 6. Remove plug (1 ) from the rear axle brake portion 7. Pass the brake release bolt through the washer and insert i into the plug hole. If the bolts are not tigh tened uniformly, the internal piston will b e distorte d or da maged. Tighten th e bolts in turn on diagonally 8. Tighten the brak e release bolts uniformly. (Both left and righ t sides