Valve Adjustments - Function Manifold; How To Adjust The System Relief Valve - Genie Z-80/60 Service And Repair Manual

Service and Repair Manual
Manifolds
8-3 Valve Adjustments - Function
Manifold
How to Adj ust the System Reli ef Val ve
How to Adjust the System Relief
Valve
Note: Perform this procedure with the boom in the
stowed position.
Note: Refer to Function Manifold Component list to
locate the system relief valve.
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 ptest port on the
function manifold.
4 Start the engine from the ground controls.
5 Press and release the rpm select button until
the engine changes to high idle.
86
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 Specifications, Hydraulic
Specifications.
7 Turn the engine off. Use a wrench to hold the
relief valve and remove the cap.
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.
September 2016
Part No. 1268556