Komatsu PC20R-8, Operation & Maintenance Manual

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ARRANGEMENT FOR THE INSTALLATION OF THE DEMOLITION HAMMER (BREAKER)
6.2.3.2 REMOVING THE HAMMER
6.2.4 MAINTENANCE
8 - Stop the machine again and lubricate the joints (See “4.5 LUBRICATION”) and the hammer (See the specific
use and maintenance manual).
9 - Before starting work, check the seals.
DANGER
•
Always wear thick gloves and safety goggles during this check.
•
To check the system for leaks, use a piece of cardboard or a wooden board.
To remove the hammer, proceed as follows:
1 - Stop the engine and move the hydraulic controls in all directions, in order to completely release the residual
pressures present in the circuits of the machine.
2 - Press the hammer control pedal to release the residual pressure present in the hammer delivery pipe.
3 - Slowly loosen the hydraulic oil filling cap to release the residual pressure from the tank.
4 - Disconnect the hammer feeding and draining pipes.
5 - Fit the sealing plugs of the rapid couplings.
6 - Disconnect the hammer from the mechanical constraints, as described in “3.13.4 CHANGING THE BUCKET”.
The hydraulic system does not require any maintenance operation and inspection other than those prescribed for
the machine.
For the maintenance operations required for the hammer, see the specific operation manual.