MAINTENANCE PROCEDURE 10. 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. NOTE Be sure to pressurize the hydraulic tank. If it is not pressu- rized, the pump will suck in air, and this will adversely affect the equipment. 11. Put back the tank cover (1). 4.9.4.b CHANGE OIL IN FINAL DRIVE CASE The parts and oil are at high temperature immediately after the engine is stopped, and may cause seri- ous burns. Wait for the temperature to go down before starting the operation. If there is still pressure remaining inside the case, the oil or plug may fly out.
Loosen the plug slowly to release the pressure. Oils, filters, coolants and batteries are considered special waste and must be collected and disposed of according to the regulations in force. Prepare a container to catch drained oil. Prepare a hexagon wrench. 1. Set so that plug (G) is at the top, with plug (G) and plug (P) perpendicular to the ground. 2. Set the container to catch oil under plug (P). 3. Using a hexagon wrench, remove plugs (P) and (G), and drain the oil. 4. Tighten plug (P). 5. Add the replacement amount of oil through the hole of plug (G). 6. When oil comes out from the hole of plug (G), install plug (G).
4.9.4.c CHECK ENGINE VALVE CLEARANCE, ADJUST As special tool is required for removing and adjusting the parts, you shall request Komatsu Dealer for service. 202 WARNING