Komatsu HB365LC-3, Operation & Maintenance Manual

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The breaker mode switch actuates the breaker.
Press this switch, and the breaker is actuated. Release this
switch, and the breaker is stopped.
METHOD FOR CHANGE-OVER AND CONNECT HYDRAULIC CIRCUIT FOR
MACHINE READY FOR INSTALLATION OF ATTACHMENT
NOTICE
• The return circuit when a breaker is installed must return directly to the return filter, so do not use it
in the mode other than B mode.
• The standard set pressure of the safety valve of the service valve is 21.6 MPa {220 kg/cm
2
} if you
select B mode set at the shipment from the plant and it becomes 24.5 MPa {250 kg/cm
2
} when ATT/P
or ATT/E mode is selected. Depending on the attachment, it may be necessary to adjust the pres-
sure. Ask your Komatsu distributor for the adjustment.
SWITCHING THE HYDRAULIC CIRCUIT
• Depending on the type of attachment, set the working mode on the monitor as follows.
• The hydraulic circuit and the set pressure of the safety valve in the service valve switch according to the
working mode selected.
Attachment Working mode Hydraulic circuit
Set pressure of safety valve
of service valve
Breaker or attachment with
one-way circuit
B mode
Return circuit automatically
becomes the circuit that
does not pass through con-
trol valve
When shipped from factory:
21.6 MPa {220 kg/cm
2
}
Crusher or other attach-
ment with two-way circuit
ATT/P or ATT/E mode Return circuit automatically
becomes the circuit that
does not pass through con-
trol valve
When shipped from factory:
24.5 MPa {250 kg/cm
2
}
Depending on the attachment, it is necessary to change the oil flow in the service circuit.
For details of setting the oil flow , see “METHOD FOR OPERATING ATTACHMENT 1 (CRUSHER ETC)
(6-23)”
SWITCHING OF BREAKER AND GENERAL ATTACHMENT
• When optional attachment is installed and working mode is set to B mode
1.
Breaker circuit (one-way circuit) is formed.
2.
Hydraulic oil flowing through breaker circuit passes through additional filter for breaker.
3.
Relief valve is set to low pressure.
When shipped from the factory: 21.6 MPa (220kg/cm
2
)
4.
Maximum oil flow can be adjusted in user mode.
• If ATT/P or ATT/E mode is turned on when the optional attachment is installed
1.
Crusher circuit (2-way circuit) is formed.
2.
Hydraulic oil flowing through crusher circuit does not pass through additional filter for breaker.
3.
Relief valve is set to high pressure.
ATTACHMENTS AND OPTIONS HANDLE MACHINE READY FOR INSTALLATION OF ATTACHMENT
6-13