Komatsu PC490-11, Installation And Instruction Manual

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PRECAUTIONS FOR HIGH-PRESSURE GREASE WHEN ADJUSTING TRACK
TENSION
• Grease is pumped into the track tension adjustment sys-
tem under high pressure. If the specified procedure for
maintenance is not followed when making adjustment,
grease drain plug (1) may fly out and cause serious injury
or death or property damage.
• When loosening grease drain plug (1) to loosen the track
tension, never loosen it more than 1 turn. Loosen the
grease drain plug slowly.
• Never put your face, hands, feet, or any other part of your
body close to grease drain plug (1).
DO NOT DISASSEMBLE RECOIL SPRING
Never disassemble the recoil spring assembly.
The recoil spring assembly has a powerful spring that acts to
reduce the impact on the idler. If it is disassembled by mistake,
the spring may shoot out and cause serious personal injury or
death. If it is necessary to disassemble it, ask your Komatsu
distributor to perform the work.
HANDLE ACCUMULATOR AND GAS SPRING
This machine is equipped with an accumulator. Even after the engine stops, if the work equipment control lever
is operated after stop of the engine in the direction to lower the work equipment, the work equipment goes down
with its own weight.
After stopping the engine, set the lock lever to LOCK position.
The accumulator and gas spring are charged with high-pressure nitrogen gas. If the accumulator is handled
mistakenly, it may cause an explosion. It is dangerous and may cause serious personal injury or death. Always
observe the following.
PRECAUTIONS FOR MAINTENANCE SAFETY
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