Service and Repair Manual April 2017Manifolds54 GTH-1056 Part No. 12781457-1Primary Function Manifold Components - Models with Single JoystickThe primary function manifold is located under the manifold inspection cover.IndexNo. Description SchematicItem Function Torque1 Solenoid valve, 2 position 4 way AA Function select -boom extend andsway left40 ft-lbs / 54 Nm2 Directional valve, 3 position 4 way,pilot operatedAB Boom extend/retract 140 ft-lbs / 189 Nm3 Directional valve, 3 position 4 way,pilot operatedAC Boom up/down 140 ft-lbs / 189 Nm4 Solenoid valve, 2 position 4 way AD Function select -boom down andfork tilt down40 ft-lbs / 54 Nm5 Directional valve, 3 position 4 way,pilot operatedAE Fork tilt up/down 50 ft-lbs / 68 Nm6 Relief valve, 3500 psi / 241 bar AF Fork tilt up relief 25-30 ft-lbs / 34-41 Nm7 Check valve, pilot operated 100 psi/ 6.9 barAG Fork tilt down circuit 40-45 ft-lbs / 54-61 Nm8 Check valve, pilot operated 100 psi/ 6.9 barAH Fork tilt up circuit 40-45 ft-lbs / 54-61 Nm9 Relief valve, 3500 psi / 241 bar AI Fork tilt down relief 25-30 ft-lbs / 34-41 Nm10 Relief valve, 3500 psi / 241 bar AJ System relief 40-45 ft-lbs / 54-61 Nm11 Diagnostic nipple AK Test port 'LS'12 Flow regulator valve, 0.1 gpm / 0.4L/minAL Load sense drain circuit 33-37 ft-lbs / 45-50 Nm13 Check valve, 5 psi / 0.3 bar AM Sway right circuit 20 ft-lbs / 27 Nm14 Priority flow regulator valve, 2 gpm/ 7.6 L/minAN Sway left/right circuit 33-37 ft-lbs / 45-50 Nm15 Check valve, 5 psi / 0.3 bar AO Sway left circuit 20 ft-lbs / 27 Nm
