Komatsu PC138US-11 Operation & Maintenance Manual page 437

Hydraulic excavator
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ATTACHMENTS AND OPTIONS
Grease the breaker while holding it in the right posture shown
below.
Lower the chisel perpendicularly to the ground.
Insert the grease gun perpendicularly to the greasing
point.
Wrong posture
RECOMMENDED ATTACHMENT OPERATIONS
WENAM00111
6-37

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