Komatsu PC22MR-3 Operation & Maintenance Manual page 166

Hydraulic excavator
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FUNCTIONING
USE OF THE MACHINE AND RELATED CONTROLS
Operations for which it is not allowed to exploit the
dropping force of the bucket
Do not exploit the dropping force of the bucket to use it as a
pickaxe, breaker, or pile driver.
This may considerably reduce the life of the machine.
Operations for which it is not allowed to exploit the
dropping force of the machine
It is prohibited to carry out digging operations using the
dropping force of the machine.
When excavating hard rock bed, use some other method to
break the rock into small pieces before excavating. This avoids
any damage to the machine and is also more economical.
Support the blade on both sides
When using the blade as a stabilizer, avoid loading all the
weight of the machine on one side of the blade only.
WEAM014500
3-78

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