Komatsu — Komatsu PC450-6K and PC450LC-6K Hydraulic Excavator Operation & Maintenance Manual

24. SERVICE PROCEDURE 24.8 EVERY 2000 HOURS SERVICE Maintenance for every 50, 100, 250, 500 and 1000 hours should be carried out at the same time. 24.8.1 CHANGE OIL IN FINAL DRIVE CASE Prepare the following. Container to catch drained oil: Min. 12 l capacity Refill capacity: 12 l (3.2 US gal, 2.6 UK gal) Handle 1. Set the TOP mark at the top, with the TOP mark and plug P perpen- dicular to the ground surface. 2. Set a container under plug P to catch the oil. 3. Remove plug P and F with the handle and drain the oil. REMARK Check the O-rings in the plugs for damage. If necessary, replace with new ones. 4. Screw in plug P . 5. Add engine oil through the hole of plug F .

For details of the oil to use, see 20. “USE OF FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE”. 6. When the oil overflows from the hole of plug F , install plug F . Tightening torque of plugs P and F : 70 ± 10Nm (7 ± 1 kgm, 50 ± 7 Ibft). PC450-ENG 3-73 WARNING • The oil is at high temperature immediately after the machine has been operated. Wait for the oil to cool down before carry- ing out maintenance. • If there is still pressure remaining inside the case, the oil or plug may fly out. Loosen the plug slowly to release the pressure. WARNING