Method For Removing And Installing Attachment - Komatsu PC290LC-11 Operation & Maintenance Manual

ATTACHMENTS AND OPTIONS
Switching method of breaker and general attachment
Install an optional attachment and set the working mode to B mode.
Breaker circuit (one-way circuit) is formed.
Hydraulic oil flowing through breaker circuit passes through additional filter for breaker. Relief valve is set to low
pressure. Maximum oil flow can be adjusted in user mode.
Set pressure of safety valve of service valve (when shipped from plant):20.6 MPa{210 kg/cm
Crusher or other attachment with 2-way circuit
Install an optional attachment and set the working mode to ATT/P or ATT/E mode.
Crusher circuit (2-way circuit) is formed.
Hydraulic oil flowing through crusher circuit does not pass through additional filter for breaker. Relief valve is set
to high pressure. Maximum oil flow can be adjusted in user mode.
Set pressure of safety valve of service valve (when shipped from plant):27.4 MPa{280 kg/cm

METHOD FOR REMOVING AND INSTALLING ATTACHMENT

Lower the attachment to the ground and stop the engine.
METHOD FOR REMOVING ATTACHMENT
1.
Turn the starting switch to ON (B) position.
2.
Set the lock lever to FREE position (F).
HANDLE MACHINE READY FOR INSTALLATION OF ATTACHMENT
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WARNING
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