Terex Genie GR-26J Service Manual

Also see for Genie GR-20J: Service manual Operator's manual

Section 4 • Repair Procedures4 - 32 GR™-20J • GR™-26J Part No. 227656GTMarch 20227-2Valve Adjustments -Function ManifoldHow to Adjust the System ReliefValveNote: Be sure that the hydraulic oil level is at theFULL mark on the hydraulic tank.1 Block the wheels at the steer end of themachine.2 Open the turntable cover at the hydraulic powerunit side of the machine.3 Remove the fasteners securing the functionmanifold to the hydraulic tank. Set the fastenersto the side.4 Loosen the clamp securing the hydraulic powerunit to the hydraulic tank. Do not remove theclamp.5 Remove the clamp securing the hydraulicpower unit to the chassis. Set the clamp to theside.6 Rotate the function manifold and locate thesystem relief valve on the function manifold(schematic item F).7 Connect a 0 to 2500 psi / 0 to 175 barpressure gauge to the test port on the hydraulichose reel.a system relief valve8 Turn the key switch to ground control and pullout the red Emergency Stop button to the onposition at both the ground and platformcontrols.Note: Rotate the red Emergency Stop button atplatform control one quarter turn in a clockwisedirection to restore the power supply. The redEmergency Stop button returns automatically tothe out, or on position.9 At the ground controls, press and hold thefunction enable button.FUNCTION MANIFOLDa