Genie Z-51/30J, Service And Repair Manual

Page: 42 / 144

32 Z®-51/
31J
Part No. 1268553GT
October 2020 Service and Repair Manual
4-2
Primary Boom
How to Remove the Primary
Boom
WARNING
Bodily injury hazard. This
procedure requires specific
repair skills, lifting equipment
and a suitable workshop.
Attempting this procedure
without these skills and tools
could result in death or serious
injury and significant component
damage. Dealer service is
strongly recommended.
Note: Perform this procedure with the boom in the
stowed position.
Note: When removing a hose assembly or fitting,
the O-ring (if equipped) on the fitting and/or hose
end must be replaced. All connections must be
torqued to specification during installation. Refer to
Specifications,
Hydraulic Hose and Fitting Torque
Specifications.
1 Remove the platform.
2 Remove the jib boom. Refer to Repair
Procedure, How to Remove the Jib Boom.
3 Remove the cable track. Refer to Repair
Procedure, How to Remove the Cable Track.
4 Raise the primary boom to a horizontal
position.
5 Remove the hose and cable cover from the
upper pivot.
6 Remove the pin retaining fastener from the
master cylinder barrel-end pivot pin. Use a soft
metal drift to remove the pin. Then lower the
cylinder and let it hang down.
NOTICE
Component damage hazard.
When lowering the master
cylinder down, be sure not to
damage the master cylinder
hoses or fittings.
7 Locate the primary boom drive speed limit
switch inside of the upper pivot.
8 Remove the primary boom drive speed limit
switch mounting fasteners. Do not disconnect
the wiring.
9 Locate the primary extension boom drive speed
limit switch inside of the extension boom.
10 Remove the primary extension boom drive
speed limit switch mounting fasteners. Do not
disconnect the wiring.
11 Pull the limit switch and the wiring out of the
extension tube and move it out of the way.
12 Tag, disconnect and plug the primary boom
extension cylinder hydraulic hoses. Cap the
fittings on the cylinder.
WARNING
Bodily injury hazard. Spraying
hydraulic oil can penetrate
and burn skin. Loosen
hydraulic connections
very slowly to allow the
oil pressure to dissipate
gradually. Do not allow oil to
squirt or spray.
13 Remove the hose clamp at the pivot end of the
boom.
Primary Boom Components