Komatsu PC22MR-3, Operation & Maintenance Manual

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MACHINE CONFIGURATION FOR THE INSTALLATION OF ATTACHMENTS
OPTIONAL EQUIPMENT
6-10
HYDRAULIC CIRCUIT 6
Installing and connecting the equipment 6
WARNING
q
The machine must be parked on a level surface, with the equipment resting on the ground.
q
When the coupling pins are removed or installed, chips may come off; always use gloves, goggles and
helmet.
q
The change of the equipment must be carried out by two operators, who must decide together the
words and signals to be used during work.
q
Avoid using your fingers to align the holes, since the may be injured or even cut off.
q
Before carrying out any operation on the hydraulic circuit, stop the engine and completely drain the
residual pressure from the pipes.
For the installation of the equipment it is necessary to connect the mechanical constraints of the bucket as
described in "CHANGING THE BUCKET (3-86)" and to carry out the hydraulic connections using the pipes
provided.
After connecting the mechanical constraints, carry out the hydraulic connections by proceeding as follows:
1. Stop the engine and move the hydraulic controls in all
directions, in order to release the residual pressures
present in the circuits of the machine.
2. Press the optional equipment control pedal to release the
residual pressure from the delivery pipe.
3. Slowly loosen the hydraulic oil filling cap, in such a way as
to release the residual pressure from the tank.
4. Remove the plugs of the quick couplers of both the
machine and the equipment.
5. Connect the right (1) and left (2) pipes. The quick couplings
must be in compliance with the ISO 7241-1 standard,
series «B».
CAUTION
When connecting the pipes, take care to prevent any
impurities from getting into them.
6. Start the machine and perform several manoeuvres with the equipment control pedal, in order to check the
seals.
WARNING
q
Wear thick gloves and safety goggles during this check.
q
To check the system for leakages, use a piece of cardboard or a wooden board.
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