Terex Genie GRC-12, Service Manual

Page: 59 / 135

February 2022 Service Manual
Function Manifold
Part No. 1314708GT GRC ™ 47
How to Adjust the Steer Relief
Valve
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.
1 Locate the steer relief valve on the function
manifold.
1 test port
2 steer relief valve
2 Connect a 0 to 5000 psi / 0 to 350 bar
pressure gauge to the test port on the function
manifold.
3 Remove the platform controls from the
platform.
4 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.
5 Activate the function enable switch and press
and hold the steer thumb rocker switch to the
right. Allow the wheels to completely turn to
the right. Continue holding the switch while
observing the pressure reading on the
pressure gauge. Note the pressure. Refer to
Specifications, Hydraulic Component
Specifications..
6 Press and hold the steer thumb rocker switch
to the left. Allow the wheels to completely turn
to the left. Continue holding the switch while
observing the pressure reading on the
pressure gauge.
7 Turn the machine off. Hold the steer relief
valve with a wrench and remove the cap.
8 Adjust the internal hex socket. Turn it
clockwise to increase the pressure or
counterclockwise to decrease the pressure.
Component damage hazard. Do
not adjust the relief valve
pressures higher than
specifications.
9 Install the relief valve cap.
10 Repeat steps 5 and 6 to confirm the relief
valve pressure.