Valve Adjustments - Function Manifold - Genie S-80 Service Manual

Section 4 • Repair Procedures
MANIFOLDS
8-2
Valve Adjustments -
Function Manifold
How to Adjust the System
Relief Valve
Note: Perform this procedure with the boom in the
stowed position.
Note: Auxiliary power will be used to perform this
procedure. Do not start the engine.
1 Connect a 0 to 5000 psi / 0 to 350 bar pressure
gauge to the diagnostic nipple (
next to the auxiliary pump.
2 Simultaneously activate and hold the auxiliary
power toggle switch and the primary boom
retract toggle switch with the primary boom fully
retracted. Observe the pressure reading on the
pressure gauge. Refer to Section 2,
Specifications.
3 Locate the system relief valve on the function
manifold (item SB). Use a wrench to hold the
relief valve and remove the cap using an allen
wrench.
4 Adjust the internal hex socket. Turn it clockwise
to increase the pressure or counter clockwise to
reduce the pressure. Install the relief valve cap.
Component damage hazard. Do
not adjust the relief valve higher
than specified.
5 Repeat step 2 to confirm relief valve pressure.
6 Remove the pressure gauge.
4 - 44
How to Adjust the Boom Down
Relief Valve
Note: Perform this procedure with the boom in the
stowed position.
1 Connect a 0 to 5000 psi / 0 to 350 bar pressure
2 Start the engine from the ground controls.
3 Hold the function enable/rpm select toggle
) located
PTEST
4 Turn the engine off. Use a wrench to hold the
5 Adjust the internal hex socket. Turn it clockwise
6 Repeat steps 2 through 5 and confirm relief
S-80 • S-85 • S-80X
gauge to the diagnostic nipple located next to
the auxiliary pump.
switch to the high idle position and activate and
hold the boom down toggle switch with the
boom fully lowered. Observe the pressure
reading on the pressure gauge. Refer to
Section 2, Hydraulic Specifications.
relief valve and remove the cap (item SN) on
the function manifold.
to increase pressure or counterclockwise to
decrease pressure. Install the relief valve cap.
Tip-over hazard. Do not adjust
the relief valves higher than
specified.
valve pressure.
February 2012
Part No. 122985