Komatsu PC450-8 Operation & Maintenance Manual page 224

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OPERATION
MACHINE OPERATIONS AND CONTROLS
Permissible Water Depth
NOTICE
When driving 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 cooling
fan. This may cause the fan to break.
Be extremely careful when driving the machine out of
water.
Do not drive the machine in water deeper than the center of
carrier roller (1).
Supply grease to the parts which have been under water for a
long time until the used grease is projected out of the bearings
(around the bucket pin, in particular).
3-158

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