MAINTENANCE BASICS 22.5 REPLACING SAFETY-RELATED PARTS Worn safety-related parts may cause accidents! Have parts which are important for machine safety and fire protection replaced at your local Komatsu dealer at regular intervals. Have the following parts replaced at your local Komatsu dealer at regular intervals, even if they are not visibly worn: Have the safety belt replaced at least every three years. Do not use hoses longer than six years under normal operat- ing conditions. Have hoses replaced, if you detect one of the following damages:
damage to the outer layer reaching down to the lining, embrittlement of the outer layer, deformations that do not correspond to the normal shape of the installed hose, when the hose is pressurised and depressurised, leaks, damage to hose fittings or connections between fittings and hoses, damage due to storage (the storage time for hoses should not exceed two years). When replacing hoses, do not forget to replace also all accessory O-rings, gaskets, and similar parts. 22.5.1 WELDING INSTRUCTIONS Set the engine start switch to switching position '0' (OFF). Apply only briefly a voltage of more than 200 V. Connect the earthing cable at a distance of max. 3.28 ft (1 m) to the area to be welded.
There must be no gaskets or bearings between the welding area and the mass point. There must be a minimum distance of 3.28 ft (1 m) between the welding area and the battery. Do not weld lines or pipes containing fuel or oil. 130