Komatsu PW98MR-10 Operation & Maintenance Manual page 60

PRECAUTIONS FOR MAINTENANCE
• Lower the work equipment completely to the ground and
stop the engine before performing any inspection and
maintenance.
• Turn the starting switch to ON position. Operate the work
equipment control lever back and forth, right and left 2 to 3
times fully to release the remaining internal pressure in the
hydraulic circuit. Then move lock lever to LOCK position
(L) and turn the starting switch to OFF position.
• Check that the battery relay is off and main power is not
conducted. (After turning off the starting switch, wait for ap-
proximately 1 minute and press the horn switch. If the horn
does not sound, power is not conducted.)
• Engage the safety lock of the boom swing control.
• Put blocks under the wheels to prevent the machine from
moving.
TWO WORKERS FOR MAINTENANCE WHEN ENGINE IS RUNNING
To prevent personal injury, do not perform maintenance with the engine running. When it is necessary to per-
form the maintenance with the engine running, always observe the following.
• 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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WENAM00061
SAFETY