Stop Engine Before Carrying Out Maintenance; Two Workers For Maintenance When Engine Is Running - Komatsu PC450-8 Operation & Maintenance Manual

SAFETY MAINTENANCE INFORMATION

STOP ENGINE BEFORE CARRYING OUT MAINTENANCE

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Stop the machine on firm, level ground.
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Select a place where there is no hazard of falling rocks or
landslides, or of flooding if the land is low.
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Lower the work equipment completely to the ground and
stop the engine.
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Turn the starting switch to the ON position. Operate the work
equipment control lever back and forth, left and right at the
full stroke 2 to 3 times to eliminate the remaining internal
pressure in the hydraulic circuit, and then push up lock lever
(1) to the LOCK position (L).
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Check that the battery relay is off and main power is not con-
ducted. (Wait for approx. one minute after turning off the
engine starting switch key and press the horn switch. If the
horn does not sound, it is not activated.)
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Put blocks under the track to prevent the machine from mov-
ing.

TWO WORKERS FOR MAINTENANCE WHEN ENGINE IS RUNNING

To prevent injury, do not carry out maintenance with the engine running. If maintenance must be carried out with
the engine running, carry out the operation with at least two workers and do as follows.
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One worker must always sit in the operator's seat and be ready to stop the engine at any time. All workers must
maintain contact with the other workers.
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When carrying out operations near the fan, fan belt, or other
rotating parts, there is a hazard of being caught in the parts,
so be careful not to come close.
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Never drop or insert tools or other objects into the fan or fan
belt. Parts may break or be sent flying.
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SAFETY