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8. PRECAUTIONS FOR MAINTENANCE
PRECAUTIONS WHEN USING HIGH-PRESSURE GREASE TO
ADJUST TRACK TENSION
• Grease is pumped into the track tension adjustment system under high pressure.
If the specified procedure for maintenance is not followed when making adjustment, valve
cause damage or personal injury.
• When loosening grease drain valve
• Never put your face, hands, feet or any other part of your body directly in front of any grease drain valve.
Adjusting track tension
HANDLING HIGH PRESSURE HOSES
• If oil or fuel leaks from high-pressure hoses, it may cause fire or defective operation, which may lead to
personal injury or damage. If any damaged hoses or loose bolts are found, stop work and contact your
Komatsu distributor for repairs.
• Replacing high-pressure hoses requires a high level of skill, and the torque is determined according to the
type of hose and size, so please do not carry out replacement yourself. Ask your Komatsu distributor to carry
out replacement.
PRECAUTIONS WITH HIGH-PRESSURE OIL
When inspecting or replacing high-pressure piping or hoses, always check that the pressure in the hydraulic
circuit has been released. If the circuit is still under pressure, it will lead to serious injury or damage, so always
do as follows.
• For details of the method of releasing the pressure - see "8.1 BEFORE CARRYING OUT MAINTENANCE,
STOP ENGINE BEFORE CARRYING OUT INSPECTION AND MAINTENANCE". Never carry out inspec-
tion or replacement before releasing the pressure completely.
• Wear safety glasses and leather gloves.
• If there is any leakage from the piping or hoses, the piping, hoses and the surrounding area will be wet, so
check for cracks in the piping and hoses and for swelling in the hoses.
If it is difficult to locate the leakage, always please contact your Komatsu distributor for repairs.
• If you are hit by a jet of high-pressure oil, consult a doctor immediately for medical attention.
INCORRECT
1-30
never loosen it more than one turn.
See 24.2 WHEN REQUIRED".
CORRECT
WARNING: for reasons of
safety, always follow these
safety precautions.
may fly out and
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