12. OPERATION 3. Set the safety lock lever c to the FREE position, and raise the bucket from the ground. FREE 4. Operate bucket control lever v and arm control lever b slowly to move the bucket cylinder and arm cylinder to the end of the stroke. 5. Carry out bucket and arm operation for 5 minutes at full stroke, alter- nating between bucket operation and arm operation at 30 second intervals. If the swing lock switch n is set to the ON (actuated) position and swing control lever b is operated at full stroke, oil temperature rise can be increased earlier. NOTICE When the work equipment is retracted, take care that it does not interfere with the machine body or ground. 6.
After carrying out the warming-up operation, check that each gauge and monitor lamp is in the following condition. Engine water temperature gauge g : Inside green range Fuel gauge h : Inside green range Engine water temperature monitor i : OUT Radiator water level monitor j : OUT Engine oil pressure monitor k : OUT Charge level monitor l : OUT Fuel level monitor m : OUT Air cleaner clogging monitor n : OUT Engine pre-heating monitor o : OUT Engine oil level monitor p : OUT Hydraulic oil level monitor q : OUT 7. Check that there is no abnormal exhaust gas colour, noise, or vibra- tion. If any abnormality is found, repair it. PC450-ENG 2-52