Komatsu PC138US-11 Operation & Maintenance Manual page 254

MACHINE OPERATIONS AND CONTROLS OPERATION
When performing the backhoe operation near the blade, take
care that the boom cylinder does not touch the blade. Dig with
the blade at the rear usually, and dig in front of the blade only
when required.
PERMISSIBLE DEPTH OF WATER, SOIL AND DIRT
NOTICE
When traveling the machine out of water, if the angle of the
machine exceeds 15 °, the rear of the upper structure will
go under water, and water will be thrown up by the radiator
fan, and it may leads breakage of fan. This may cause the
fan to break. Be extremely careful when driving the ma-
chine out of water.
Do not drive the machine in water or soil and dirt deeper than
the center of carrier roller (1).
After the job, be sure to supply grease to the parts which have
been under water for a long time until the used grease is pro-
jected. (Around the bucket pin, in particular)
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