Valve Adjustments - Function Manifold - Genie GR-12 Service Manual

Service Manual
Function Manifold
4-2
Valve Adjustments -
Function Manifold
Note: Perform this test from the ground with the
platform controls. Do not stand in the platform.
Note: Verify the hydraulic oil level is at the FULL
mark on the hydraulic tank.
How to Adjust the System Relief
Valve
1 Locate the system relief valve on the function
manifold (schematic item I).
1 test port
2 system relief valve
2 Connect a 0 to 5000 psi / 0 to 350 bar
pressure gauge to the test port on the function
manifold (schematic item A).
64
3 Chock both sides of the wheels at the steer
end of the machine.
4 Remove the platform controls from the
platform.
5 Turn the key switch to platform controls and
pull out the red Emergency Stop button to the
on position at both ground and platform
controls.
6 Move and hold the joystick fully in either
direction while observing the pressure reading
on the pressure gauge. Note the pressure.
Refer to Specifications, Hydraulic Component
Specifications.
7 Turn the machine off. Hold the system relief
valve with a wrench and remove the cap
(schematic item I).
8 Adjust the internal hex socket. Turn it
clockwise to increase the pressure or
counterclockwise to decrease the pressure.
9 Install the relief valve cap.
10 Repeat steps 5 and 6 to confirm the relief
valve pressure.
GR ™ • QS ™ R • QS ™ W
May 2018
Part No. 1275811GT