TURBINE 1480887 - Caterpillar

Problem
Movement of the quick coupler or the boom extend/retract is slow or inoperative.
Possible Cause
Filter screens in the control valve (joystick) are blocked.Problem
The boom does not extend.
Possible Causes
Filter screens in the control valve (joystick) are blocked.
The resolver network of the bank valve is faulty.
Resolver valves in the control valve (access) are faulty. Machines that are equipped with an access platform
The filter screens in the control valve (access) are blocked.
The boom extend solenoid valve in the control valve (joystick) not activated due to sticking or an open electrical circuit.Problem
The boom does not retract.
Possible Causes
Filter screens in the control valve (joystick) are blocked.
The resolver network of the bank valve is faulty.
The boom retract solenoid valve in the control valve (access) is not activated due to sticking or an open electrical circuit.Problem
The quick coupler does not tilt forward.
Possible Causes
Solenoid valve 5 or solenoid valve 6 in the control valve (joystick) is not activated due to sticking or the solenoid valve has a open electrical circuit.
Solenoid valve 9 or solenoid valve 10 is not activated due to sticking or the solenoid valve has a open electrical circuit.
The load control valve for the tilt cylinder is faulty.
The resolver network for the bank valve is faulty.
The relief valve for the coupler tilt is faulty.
Filter screens in the control valve (joystick) are blocked.Problem
The quick coupler does not tilt back.
Possible Cause
Solenoid valve 5 in the control valve (joystick) is not activated due to sticking or the solenoid valve has an open electrical circuit.
. Solenoid valve 11 or solenoid valve 12 in the control valve (joystick) is not activated due to sticking or the solenoid valve has a open electrical circuit.
The load control valve for the tilt cylinder is faulty.
The resolver network for the bank valve is faulty.
The relief valve for the coupler tilt is sticking open.
Filter screens in the control valve (joystick) are blocked.Problem
The boom extends when the tilt forward for the quick coupler is selected.
Possible Cause
Solenoid valve 6 in the control valve (joystick) is not activated due to sticking or the solenoid valve has a open electrical circuit.Problem
The boom retracts when the tilt forward for the quick coupler is selected.
Possible Cause
Solenoid valve 10 in the control valve (joystick) is not activated due to sticking or the solenoid valve has a open electrical circuit.Problem
The boom retracts when the tilt back for the quick coupler is selected.
Possible Cause
Solenoid valve 7 in the control valve (joystick) is not activated due to sticking or the solenoid valve has a open electrical circuit.Problem
The boom extends when the tilt back for the quick coupler is selected.
Possible Cause
Solenoid valve 10 in the control valve (joystick) is not activated due to sticking or the solenoid valve has a open electrical circuit.Problem
The controls for the access platform are inoperative.
Possible Causes
Failure of electrical power supply to access platform
The boom speed solenoid valve or the selector solenoid valve in the control valve (access) is not activated due to sticking or the solenoid valve has a open electrical circuit.
Blocked filter screen at the pilot pressure inlet of the