. SAFETY SAFETY MAINTENANCE INFORMATION 2 - 37 WELDING WORKS Welding operations must al ways be carried out by a qualifi ed welde r and in a pla ce equipped with prope r equipment. There is a hazard of gas, fir e, or electrocution when carryi ng out w elding, so ne ver allow any unqualifie d personnel to carry out welding. REMOVING BATTERY TER MINALS When repairing the electric al system or when carrying out electrica l welding, re move the negative (-) te rminal of the battery to prevent the flow of current. SAFETY FIRST WHEN USING HIGH-PRESSURE GREASE TO ADJUST TRACK T Grease is pumped into the track tension adjustment system under high pressure.
If the specified procedur e for maintenance is not follow ed when making adjustment, grea se drain plug (1) may fly out a nd cause serious injury or property damage. e drain plug (1) to loosen the track When loosening greas tension, never loosen it more than one turn. Loosen th e grease drain plug slowly. Never put your face, han ds, feet, or any other part of y our body close to grease drain plu DO NOT DISASSEMBLE RE COIL SPRINGS Never attempt to disassem ble the recoils spring assembl y. It contains a spring under high pressure w hich serves as a shock absorber for th e idler. If it is disassembled by mistake , the spring w ill fly out and cause serious injury. do the work. rious injury.
When it becomes necessa ry to disassemble it, ask your Komatsu distributor to SAFETY RULES FOR HIGH- PRESSURE OIL ways under internal pressure. When inspecting or replacing piping or hoses, always The hydraulic system is al check that the pressure in t he hydraulic circuit has been r eleased. If the circuit is still under pressure, it will lead to serious personal injury, so always do as follows. of releasing the pressure, see "METHOD FOR RELEASING INTERNAL PRESSURE For details of the method of releasing the pressure, se e "METHOD FOR RE PRESSURE IN HYDRAULIC CIRCUI T (PAGE 4-40)".
If the circuit is still under pressure, do not carry out any inspection or is still un der pressure , do not carry out any i nspection or replacement operation. If there is any leakage fro m the piping or hoses, the surr ounding area will be w et, so check for cracks in the piping and hoses and for swelli ng in the hoses. n, wear safety glasses and leather gloves. When carry out inspectio n, wear safety glasses and le ather glo