8. PRECAUTIONS FOR MAINTENANCE WARNING: For reasons of safety, always follow these safety precautions. 1-22 PREVENT DUMP BODY FROM COMING DOWN When carrying out inspection with the body raised, always set the dump lever to the HOLD position, and lock it in position, then insert the safety pin securely. A0055140 PRECAUTIONS WHEN CARRYING OUT WORK WITH CHASSIS RAIS ED Always observe the following precautions when jacking up the machine. ‡ Do not jack up the machine on soft ground. ‡ Always stop the machine on flat hard ground where it is possible to carry out the work safely. ‡ Always apply the parking brake. ‡ Put blocks under the wheels at the opposite end before jacking up the machine.
When jacking up the front wheels, put blocks behind the rear wheels; when jacking up the rear wheels, put blocks in front of the front wheels. When jacking up the machine to replace the tire, the jacking-up point is as given below. When carrying out such work, please consult your Komatsu distributor. 1. Check that jack 1 (30 t or 50 t) is securely set under the chassis before jacking up the machine. 2. Make sure that jack 1 is stable and that it will not slip or come out of position. Jack up the chassis slowly and always check the condition of the jack. 3. After jacking up the chassis, set blocks 2 securely in the center under the H-frame.