AMEngineering Company

To install Hydraulic Valves to operate an AME Quick hitch manufactured by Andrew Millwood.

The Quick Hitch will be plumbed from the following Ports.

1. Test port direct in the main pump

2. Pump for pilot controls.

3. The Bucket cylinder on dipper arm.

At all pick up oints you should use a non return Valve or Check Valve NO SK7A1 between the Pump and Valve.

1. Pick up oil from the main Pump you should use a pressure REDUCING and DIRECTIONAL valve No OP 137 24 volt. Set the reducing Valve to 200 BAR or 2500 psi.
This valve with the check valve in line will maintain a constant pressure to the Quick hitch cylinder and will reduce the risk of OVER PRESSURE or the LACK of pressure.

2. To pick up oil for the Quick hitch from PILOT oil supply use the check VALVE No SK&AI at the point of pick up, and then use 4WEG C 6XLE 24V N9KE valve to control the oil direction. This oil pressure is lower than the main pump, therefore you do not require a reducing valve.

3. Picking up oil from the BUCKET cylinder on DIPPER ARM, requires two check valves. One at the point of pick up and one on TANK return to stop the Cylinder pressure from DISCONNECTING the Quick hitch. You require 4 WECG C 6 X IE 24 V valve to direct the oil.

PARTS REQUIRED.

PRESSURE REDUCING & DIRECTION VALVE OP 137 24 volt.
DIRECTION VALVE 4WEG C XIE 2V N 9 K4
S K 7 A I ¼ CHECK VALVE
We recommend you use 3/8 hydraulic tube.