November 2016
Service and Repair Manual
Manifolds
Part No. 1272220GT
GS-2669 DC • GS-3369 DC • GS-4069 DC
51
How t o Adj ust t he Oscill at e R elief Valve
How to Adjust the Oscillate Relief
Valve
Note: Perform this procedure with the machine in
the stowed position and in high torque mode.
1
Connect a 0 to 5000 psi / 0 to 350 bar
pressure gauge to test port #2 (TP2) on the
function manifold.
2
Disconnect the harness from the oscillate
supply coil and the steer right coil.
3
Connect the oscillate supply harness to the
steer right coil and the steer right harness to
the oscillate supply coil.
4
Turn the key switch to platform control and pull
out the red Emergency Stop button to the on
position at both the ground and platform
controls.
5
Steer the machine to the right and hold. Note
the pressure readings on the pressure gauge.
Refer to Specifications,
Hydraulic
Components Specifications
.
6
Use a wrench to hold the oscillate relief valve
and remove the cap.
7
Adjust the internal hex socket. Turn it
clockwise to increase the pressure or
counterclockwise to decrease the pressure.
Install the relief valve cap.
Tip-over hazard. Do not adjust
the relief valve higher than
specified.
8
Repeat this procedure beginning with step 5 to
confirm the relief valve pressure.
9
Connect the harness back to the original
position.
10 Remove the pressure gauge.
1 test port #2
2 oscillate supply coil (green/white and
brown wires)
3 steer right coil (blue and brown wires)
4 oscillate relief valve
