Komatsu A73001, Shop Manual

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FOREWORD SAFETY
00-4
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WB156PS-5
3. Before starting work, remove the leads from the battery. ALWAYS remove the lead from the negative (-) terminal first.
4. When raising heavy components, use a hoist or crane. Check that the wire rope, chains and hooks are free from damage.
Always use lifting equipment which has ample capacity. Install the lifting equipment at the correct places. Use a hoist or
crane and operate slowly to prevent the component from hitting anything. Do not work with any part while it is still raised
by the hoist or crane.
5. When removing covers which are under internal pressure or under pressure from a spring, always leave two bolts in posi-
tion on opposite sides. Slowly release the pressure, then slowly loosen the bolts to remove.
6. When removing components, be careful not to break or damage the wiring. Damaged wiring may cause electrical fires.
7. When removing piping, stop the fuel or oil from spilling out. If any fuel or oil drips on to the floor, wipe it up immediately.
Fuel or oil on the floor can cause you to slip, or even start fires.
8. Never use flammable liquids to clean parts. Always use approved non-flammable solvents to clean parts.
9. Be sure to assemble all parts in their original locations. Replace any damaged part with new parts.
• When installing hoses and wires, be sure that they will not be damaged by contact with other parts when the machine
is being operated.
10. When installing high pressure hoses, be sure that they are not twisted. Damaged tubing is dangerous. Be extremely careful
when installing tubes for high pressure circuits. Also make sure parts are correctly installed.
11. When assembling or installing parts, always use the specified tightening torques and sequences. When installing protec-
tive parts such as guards, or parts that may vibrate or rotate at high speeds, be particularly careful to check their installa-
tion carefully.
12. When aligning two holes, never insert your fingers or hand. Use appropriate tools to align parts.
13. When measuring hydraulic pressure, be sure the measuring tool is correctly assembled before taking any measurements.
14. Take care when removing or installing the tracks on track-type machines. When removing the track, the track separates
suddenly. Never let anyone stand at either end of the track.
15. When making repairs or adjustments on electronically-controlled engines, avoid any physical contact with the injection
system’s wiring harness while the engine is running. Due to the high voltage and amperage in this system, serious injury
may occur.
16. Never use a welder or machine with a higher voltage to jump-start or supply voltage to a machine with a lower voltage
system. Damage to the machine’s electrical system, a fire or an explosion may result. Always stay within the same voltage
range as the machine.
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