MAINTENANCE PROCEDURE 5. Open the engine rear cover and the cooling cover (1) (for further details, see "3.2.10 COOLING COVER") 6. Loosen the screws (2) and remove the plate (3).Loosen bolts (2), then remove plate (3) to the front. 7. Remove the cap from oil filler (F), and release the internal pressure. 8. Set the oil container under the drain plug under the ma- chine. 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: 68.6 ± 9.81Nm (7 ± 1kgf·m, 50.6 ± 7.2 lb.ft.) Take care not to get oil on yourself when you remove drain plug (P). .9.
When opening (tilting) the floor, see Section "3.2.12 METHOD OF OPENING (TILTING) FLOOR" for details 10. Loosen hose clamp (4), remove hose (5), then remove bolt (6) and take out strainer (7). 11. Remove any dirt stuck to strainer (7), then wash it in clean diesel oil or flushing oil. If strainer (7) is damaged, replace it with a new one. 12. Secure strainer (7) with bolt (6), then install hose (5) and secure it in position with hose clamp (4). 13. After completing the adjustment, close the floor. For de- tails, see Section "3.2.12 METHOD OF OPENING (TILT- ING) FLOOR". 14. Add the replacement amount of oil through oil filler (F).
Check that the oil level is between the H and L lines on the sight gauge (G). 15. Extend the boom, arm, and bucket cylinder fully as shown in the diagram on the right, remove the oil filler cap, then install the cap and pressurize the inside of the tank. IMPORTANT Be sure to pressurize the hydraulic tank. If it is not pres- surized, the pump will suck in air, and this will adversely affect the equipment. 16. After replacing the oil, set each control lever to the neutral positionand run the engine idle at a low speed for 2 to 3 minutes, then start the normal work. 4.9.5.b CHECK ALTERNATOR, STARTING MOTOR The brush may be worn or the bearing may have run out of grease.
Contact your Komatsu Dealer for inspection or repair. If the engine is started frequently, carry out inspection every 1000 hours. 204