How To Adjust The Secondary Boom Up Relief Valve - Genie Z-80/60 Service And Repair Manual

September 2016
How to Adj ust the Sec ondary Boom U p Reli ef Val ve
How to Adjust the Secondary
Boom Up Relief Valve
Note: Refer to Function Manifold Component list to
locate the secondary boom up relief valve.
1 Remove the cover retaining fasteners from the
secondary boom end cover. Remove the cover
from the machine.
2 Locate the wire connector for secondary boom
limit switch LSS2AO. Disconnect the
connector.
Note: The secondary boom limit switch LSS2AO is
the upper limit switch located on the inside of the
riser plate at the engine side of the machine.
3 Install a jumper wire between pins 3 and 4 of
the LSS2AO Deutsch connector on the wire
harness end.
4 Connect a 0 to 5000 psi / 0 to 350 bar
pressure gauge to the ls port on the function
manifold.
5 Start the engine from the ground controls.
6 Simultaneously push and hold the function
enable/high speed button and the secondary
boom up/extend button and fully raise the
secondary boom.
Part No. 1268556
7 Continue holding the function enable/high
speed button and the secondary boom
up/extend button while observing the reading
on the pressure gauge. Refer to
Specifications, Hydraulic Specifications.
8 Turn the engine off. Use a wrench to hold the
relief valve and remove the cap.
9 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.
10 Repeat steps 5 through 7 to confirm relief
valve pressure.
11 Remove the pressure gauge.
12 Remove the jumper wire from LSS2AO limit
switch connector. Connect the limit switch to
the wire harness.
13 Install the secondary boom end cover and
tighten the retaining fasteners.
Service and Repair Manual
Manifolds
89