Valve Adjustments - Function Manifold - Genie GS-2646AV Service And Repair Manual

September 2016
5-3
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).
2 Connect a 0 to 5000 psi / 0 to 350 bar
pressure gauge to the test port on the function
manifold (schematic item AA).
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 selector/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 AB).
Part No. 1272218
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.
GS-2646 AV • GS-2646 AV35
Service and Repair Manual
Tip-over hazard. Failure to adjust
the relief valves to specification
could result in the machine
tipping over, causing death or
serious injury. Do not adjust the
relief valve pressures higher
than specifications.
a test port
b system relief valve
c steer relief valve
d lift relief valve
Manifolds
49