24. SERVICE PROCEDURE 24.8.2 CHANGE OIL IN HYDRAULIC TANK, CLEAN STRAINER WARNING The oil is at high temperature immediately after the machine has been operated. Wait for the oil to cool down before chang- ing the oil. When removing the oil filler cap, turn it slowly to release the internal pressure, then remove it carefully. Prepare the following Container to catch drained oil: min. 273 capacity Refill, capacity: 273 l (72.3 US gal, 60.1 UK gal) Prepare a handle for the socket wrench set. 1. Swing the upper structure so that the drain plug under the hydraulic tank comes at the middle of the left or right track. 2.
Retract the arm and bucket cylinders to the stroke end, then lower the boom and put the bucket teeth in contact with the ground. 3. Lock the safety lock lever and stop the engine. 4. Remove the cover over the hydraulic tank and remove the cap of oil filler F . 5. Set the oil container under the drain plug under the machine. Using the handle, remove drain plug P and drain the oil. Check the O-ring installed to plug P , and if it is damaged, replace the O-ring. After draining the oil, tighten drain plug P . Tightening torque: 70 ± 10 Nm (7 ± 1 kgm, 50 ± 7 lbft). When removing drain plug P , be careful not to get oil on yourself. PC450-ENG 3-74