PREPARATION FOR EQUIPMENT INSTALLATION (only for machines with proportional controls)
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6.5.4 HYDRAULIC CIRCUIT
6.5.4.1 INSTALLING AND CONNECTING THE EQUIPMENT (1st-2nd line)
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The machine must be parked on a level surface, with the equipment resting on the ground.
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When the coupling pins are removed or installed, chips may come off; always use gloves, goggles and
helmet.
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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.
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Avoid using your fingers to align the holes, since the may be injured or even cut off.
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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 "3.3.14 CHANGING THE BUCKET" and carry out the hydraulic connections using the pipes
arranged.
After connecting the mechanical retainers, 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 (A) and (B) of the quick couplers of both the machine and the equipment.
5. Connect the pipes (C) and (D).
For details about the components of quick coupler see " 1. Quick coupler (1st attachment)" and " 2. Equipment
(2nd attachment)".
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The equipment quick couplings must be in compliance with the ISO 7241-1 standard, series «B».
If the quick coupler size does not match, please contact your Komatsu distributor.
Quick coupler 1st line
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