24. SERVICE PROCEDURE 24.4.2 CHANGE OIL IN ENGINE OIL PAN, REPLACE ENGINE OIL FILTER CARTRIDGE ¤ WARNING The oil is at high temperature after the engine has been oper- ated, so never change the oil immediately after finishing opera- tions. Wait for the oil to cool down before changing it. Prepare the following. Container to catch drained oil: Min 51 ¬ capacity Refill capacity: 51 ¬ (13.46 US gal, 11.22 UK gal) Socket wrench, filter wrench. 1. Open cover on the under the chassis. Set a container to catch the oil under the drain valve. 2. Remove drain plug 1 and loosen drain valve 2 slowly to avoid getting oil on yourself, and drain the oil.
Take care not to loosen drain valve 2 so much that the stopper pin in the valve is distorted. Tightening torque drain valve 1 : 69 ± 10 Nm (7 ± 1 kgm, 51 ± 7 lbft) Tightening torque drain valve 2 : 64 ± 15 Nm (6.5 ± 1.5 kgm, 47 ± 11 lbft) 3. Check the drained oil, and if there are excessive metal particles of foreign material, please contact your Komatsu distributor. 4. Tighten drain valve 2 . 5. Using a filter wrench, remove full-flow filter cartridge 3 by turning it counterclockwise. When doing this, to prevent getting oil on yourself, do not carry out this operation from immediately under the cartridge.
In particular, if this operation is carried out immediately after stopping the engine, a large amount of oil will come out, so wait for 10 minutes before starting the operation. 6. Clean the filter holder, fill a new cartridge with clean engine oil and coat the packing surface and thread of the new filter car- tridge with engine oil (a thin coat of grease is also possible), then install the cartridge. 3-47