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Service and Repair Manual
September 2016
Manifolds
56
Z-40/23N, Z-40/23N RJ
Part No. 1268528
How to Adjust the Secondary
Boom Down Relief Valve
1 Turn the machine off. Locate the proportional
relief valve (item BW) on the function manifold.
Remove the coil nut and remove the coil from
the valve cartridge and set aside. Do not
disconnect the coil electrical connector.
2 Connect a 0 to 5000 psi / 0 to 350 bar
pressure gauge to the test port TP1 on the
function manifold.
3 Turn the key switch to ground controls.
4 With the secondary boom fully lowered, move
and hold the function enable toggle switch
to
either side and hold the second
ary boom
up/down toggle switch in the down direction.
Observe the pressure reading on the pressure
gauge. Refer to Specifications,
Hydraulic
Component Specifications
.
5 Turn the machine off. Hold the secondary
boom down relief valve with a wrench and
remove the cap (item BP).
6 Adjust the internal hex socket. Turn it
clockwise to increase the pressure or
counterclockwise to decrease the pressure.
Install the relief valve cap.
Result: The relief pressure meets specification.
Continue to step 7.
Result: The relief pressure does not meet
specification. Repeat this procedure beginning
with step 3.
Tip-over hazard. Do not adjust
the relief valve higher than
specified.
7 Turn the machine off. Remove the pressure
gauge and install the proportional relief valve
coil.
Summary of Contents for Genie Z-40/23N
Page 63: ...September 2016 Service and Repair Manual Manifolds Part No 1268528 Z 40 23N Z 40 23N RJ 53 ...
Page 111: ...September 2016 Service and Repair Manual 101 Electrical Schematic Chassis ...
Page 114: ...Service and Repair Manual September 2016 104 Electrical Schematic Ground Controls ...
Page 115: ...September 2016 Service and Repair Manual 105 Electrical Schematic Platform Controls ...
Page 118: ...Service and Repair Manual September 2016 108 Ground Control Box Wiring Diagram ...
Page 119: ...September 2016 Service and Repair Manual 109 Platform Control Box Wiring Diagram ...
Page 122: ...Service and Repair Manual September 2016 112 Platform Control Box Wiring Diagram Options ...
Page 123: ...September 2016 Service and Repair Manual 113 Hydraulic Schematic ...
Page 125: ......