Valve Adjustments - Function Manifold - Genie Z80/60 Service Manual

Section 4 • Repair Procedures
MANIFOLDS
8-3
Valve Adjustments -
Function Manifold
How to Adjust the System
Relief Valve
Note: Perform this procedure with the boom in the
stowed position.
1 Locate the boom retracted limit switch
(LSP1RO) limit switch on the outside of the
primary boom at the pivot end of the primary
boom.
2 Tag and disconnect the wire harness from the
limit switch, and install a wire jumper between
pins 1 and 2 of the limit switch connector. Place
another wire jumper between pins 3 and 4 of
the limit switch connector.
3 Connect a 0 to 5000 psi / 0 to 350 bar pressure
gauge to the port on the function
PTEST
manifold.
4 Start the engine from the ground controls.
5 Press and release the rpm select button until
the engine changes to high idle.
6 Simultaneously push and hold the function
enable/high speed button and the primary boom
retract button with the primary boom fully
retracted. Observe the reading on the pressure
gauge. Refer to Section 2, Specifications.
4 - 68
7 Turn the engine off. Use a wrench to hold the
relief valve and remove the cap (item AJ).
8 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.
9 Repeat steps 4 through 8 confirm the relief
valve pressure.
10 Remove the pressure gauge.
11 Remove the wire jumpers from the limit switch
connector.
12 Securely install the LSP1RO pig tail into the
wire harness.
How to Adjust the Primary 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
gauge to the
LS
2 Start the engine from the ground controls.
3 Press and release the rpm select button until
the engine changes to high idle.
4 Raise the primary boom approximately
5 feet / 1.5 m.
Z-80/60
June 2011
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3
port on the function manifold.
Part No. 88619
REV D REV E