Komatsu WA500-6H, Operation & Maintenance Manual

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3.3 Operation Operation
3-138
WA500-6H – VEAM430100
REMARK
To reduce the generation of heat by the torque converter, keep
the target time for the digging operation within 10 seconds from
the start of thrusting in to the completion of scooping up.
The fuel consumption increases while digging working. Fuel cost
is saved by shortening the digging time.
Front wheels going on blasted rock
Do not carry out operations that make the front wheels ride up
on blasted rock. If the front wheels go on top of blasted rock,
there is danger that the sharp parts of the blasted rock will cut
the tires.
In particular, avoid pushing the bucket in too far, and when oper-
ating near natural rock after blasting (roots), do not let the front
wheels ride up on the natural rock (roots). For scooping-up oper-
ations near natural rock (roots), do not use a wheel loader. Use
a bulldozer or hydraulic excavator.
Treatment of loosened boulders
WARNING
Do not use this machine to deal with loosened boulders. If the
boulder is dropped by mistake when handling it, there is danger
that it may fall on top of the operator’s compartment and cause
serious personal injury.
Do not use this machine to deal with loosened boulders. If the
loosened boulder cannot be handled, there is danger that it may
be dropped during operations and fall on the machine or opera-
tor’s compartment. If dropped boulders hit the work equipment
cylinders, there is danger that the cylinder will bend and be
unable to move. If the boulder is dropped on the operator’s com-
partment, there is danger of serious personal injury.
Pit excavation
Do not try to shave off natural rock (roots) remaining from blast-
ing. Excessive force will be applied to the machine, and there is
danger that this may damage the work equipment or frame. For
pit excavation operations, do not use a wheel loader. Use a bull-
dozer or hydraulic excavator.
GK050148
GK050149
GK050150