Komatsu — 17. GUIDES TO MAINTENANCE

MAINTENANCE Check for foreign materials in drained oil and on filter: After oil is changed or filters are replaced, check the oil and filters for metallic particles and foreign materials. If large quantities of metallic particles or foreign materials are found, consult your distributor. Fuel strainer: If your machine is equipped with a fuel strainer, do not remove it while fueling. Oil change: Check and/or change oils in places where dust is minimized to keep foreign materials away from oils. Warning tag: Use the warning tag to alert personnel that the machine is not ready for use.

Attach the warning tag to the starting switch or other appropriate control lever to warn anyone unaware of the circumstances against starting the engine. The warning tag is supplied with the tools. Obey precautions: During machine operation, always obey the precautions on safety labels attached to the machine. Welding instructions: Turn off the engine starting switch. Do not apply more than 200 V continuously. Connect the welding ground cable no more than one meter from the area to be welded. Make sure seals and/or bearings are not between the area to be welded and the ground point. Do not use the area around the work equipment pins or the hydraulic cylinders as the ground point.

Never weld any pipe, tube or container that contains fuel, oil or other flammable materials. Fire prevention: Use nonflammable cleaner or light oil for cleaning parts. Keep sparks, flame and lighted cigarettes away from light oil. Clamp faces: When O-rings or gaskets are removed, clean the clamp faces and replace the O-rings and gaskets with new ones. Be sure to carefully install O-rings and gaskets when assembling. Objects in your pockets: Keep your pockets free of loose objects which can fall out and drop into the machinery; especially when you work on the machinery while bending over it. Checking underneath machine:

When working in rocky areas, check frequently for damage underneath the machine, wear and damaged bolts and nuts. Precautions when washing machine: Never spray steam or water directly at the radiator. Do not allow water to get on any electrical component. Pre-and post-work checks: Before starting work in mud, rain, snow or at seashore, check plugs and valves for tightness. Wash the machine immediately after working to protect components from rusting. Lubricate components more frequently than usual. Be sure to lubricate work equipment pins daily if they are submerged in water.

On job sites where heavy-duty operations are common, reduce the maintenance intervals and grease the machine more frequently. 3-3 WA420-3MC