Genie Z80/60 Service Manual page 200

Section 4 • Repair Procedures
MANIFOLDS
How to Adjust the Oscillate
Relief Valve
Note: Perform this procedure with the boom in the
stowed position.
Note: This procedure will require two people.
1 Remove the drive chassis cover from the
square-end of the machine.
2 Connect a 0 to 5000 psi / 0 to 350 bar pressure
gauge to the test port on the steer/oscillate
manifold.
3 Start the engine from the platform controls.
4 Press down the foot switch and manually
activate one of the oscillate limit switches. Hold
the switch in the activated position and observe
the reading on the pressure gauge. Refer to
Section 2, Specifications.
5 Turn the engine off. Use a wrench to hold the
relief valve and loosen the jam nut. (item CH,
before SN 1301 or item KH, after SN 1300).
6 Adjust the stud with a hex wrench. 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.
7 Repeat steps 3 through 4 to confirm relief valve
pressure.
8 Remove the pressure gauge.
9 Install the drive chassis cover.
4 - 98 Z-80/60
June 2011
REV E
Part No. 88619