machine such as hot fluids in lines and tubes and compartment covers.
11. Be careful when removing cover plates. Gradually back off the last two bolts or nuts located at
opposite ends of the cover or device and carefully pry cover loose to relieve any spring or other
pressure, before removing the last two bolts or nuts completely.
12. Be careful when removing filter caps, breathers and plugs on the machine. Hold a rag over the
cap or plug to prevent being sprayed or splashed by liquids under pressure. The danger is even
greater if the machine has just been stopped because fluids can be hot.
13. Always use the proper tools that are in good condition and that are suited for the job at hand. Be
sure you fully understand how to use them before performing any service work.
14. Reinstall all fasteners with the same part number. Do not use a lesser quality fastener even if
replacements are necessary.
15. Repairs which require welding should be performed only with the benefit of the appropriate
reference information and by personnel adequately trained and knowledgeable in welding
procedures. Determine type of metal being welded and select correct welding procedure and
electrodes, rods or wire to provide a weld metal strength at least equivalent to that of the parent
metal. Disconnect battery before any welding procedures are attempted.
16. Do not damage the wiring during repair/removal operations. Reinstall the wiring with caution not
to damage it and in the place where it may not be damaged by rubbing with sharp corners, or
some objects or hot surface. Do not connect the wiring to a line containing fluid.
17. Make sure all protective devices including guards and shields are properly installed and
functioning correctly before starting repair. If the guard or shield must be removed to perform the
repair work, use extra caution to remove it and reinstall it after repair is completed.
18. Performing maintenance or repair work on the machine with the bucket/attachment raised is
hazardous. The bucket/attachment could fall and injure or kill a person. Be sure to lower the
bucket or attachment to the ground before starting work on the machine.
19. Long or damaged fuel, lubricant and hydraulic oil lines, tubes and hoses can cause a fire. Do not
bend or strike high pressure lines. Do not insteach part which are bent or struck with something.
Inspect lines, tubes and hoses carefully. Do not check for leaks with your hands. Very small
(pinhole) leaks may become a high speed oil stream but it may be invisible until seeing the hose
up close. This oil can penetrate the skin and cause personal injury. Use a small piece of
card-board, wood or metal to locate pinhole leaks.
20. Tighten connections to the correct torque. Make sure that all heat shields, clamps and guards are
installed correctly to avoid excessive heat, vibration or rubbing against other parts during operation.
Be sure to install the shields correctly because those prevent the oil from splashing onto hot
exhaust components when lines, tubes or seals are failed.
21. Do not operate the machine if any rotating part is damaged or interferes any other part during
operation. Any high speed rotating component damaged or changed should be checked for balance
before the next operation.
22. Be careful when servicing or disassembling the crawlers. Chips can fly when removing or
installing a track (crawlers) pin. Wear protective glasses and long sleeve protective clothing.
Crawlers can unroll very quickly when disassembled. Keep away from the front and rear of the
machine. The machine can move unexpectedly when both crawlers are disengaged from the
sprockets. Chock the machine to prevent it from moving.
Rubber crawler replacement work must be done carefully by two persons. The operator must
operate the machine as instructed by the signals of the partner. The crawler belt is changed by
lifting one side of the machine at a time. Unexpected lowering or movement of the machine can
result in severe injury or death. Do not operate the boom, arm or bucket/attachment while
removing or installing the crawler belt. Follow the instructions provided.
Grease in track tensioning mechanism is under high pressure and can penetrate skin, causing
severe injury. Keep a face, hands and legs away from the grease nipple. Loosen the grease
nipple within one turn. If grease does not come out after one turn of the fitting, call KOBELCO
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1. SAFETY PRECAUTIONS
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1-6
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