Genie Z-45/25 Service Manual page 411

First Edition • Second Printing
How to Adjust the Secondary
Boom Down Relief Valve
Perform this procedure with the
boom in the stowed position.
1 Connect a 0 to 5000 psi (0 to 345 bar) pressure
gauge to the test port (item 37) on the function
manifold.
2 Start the engine from the ground controls.
3 Hold the function enable switch to the
position and activate and hold the secondary
boom down switch with the secondary boom
fully lowered. Observe the pressure reading on
the pressure gauge.
Secondary boom down relief valve specifications
Pressure
4 Turn the engine off. Use a wrench to hold the
relief valve and remove the cap (item 5).
5 Adjust the internal hex socket. Turn it clockwise
to increase the pressure or counterclockwise to
decrease the pressure. Then install the relief
valve cap.
Tip-over hazard. Do not adjust
the relief valve higher than
specified.
6 Repeat steps 2 through 5 and recheck relief
valve pressure.
Part No. 52709
Valve Coil Resistance
Specifications
Valve coil specifications
Proportional solenoid valve, 12V
(schematic items A, B and LL)
3 position 4 way directional valve, 10V
(schematic items S, BB, DD, FF, GG and II)
HIGH IDLE
2 position 3 way solenoid valve, 10V
(schematic items K and L)
1800 psi
124 bar
Genie Z-45/25 & Genie Z-45/25J
Section 7 • Repair Procedures
MANIFOLDS
4 to 5Ω
5 to 7Ω
5 to 7Ω
7 - 63