October 2020
Part No. 1268553GT
Z®-51/
31J
35
Service and Repair Manual
6 Tag, disconnect and plug the primary boom lift
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.
7 Remove the pin retaining fasteners from the
primary boom lift cylinder rod-end pivot pin.
Use a soft metal drift to remove the pin.
WARNING
Crushing hazard. The primary
boom will fall if not properly
supported when the primary
boom rod-end pivot pin is
removed.
8 Place a support block across both turntable
covers under the primary boom lift cylinder.
9 Lower the rod end of the lift cylinder onto the
block. Protect the cylinder rod from damage.
WARNING
Crushing hazard. The primary
boom lift cylinder could become
unbalanced and fall if not
properly supported by the lifting
device.
10 Remove the primary boom lift cylinder barrel-
end pivot pin retaining fasteners. Do not
remove the pin.
11 Use a slide hammer to remove the barrel-end
pivot pin. Carefully remove the primary boom
lift cylinder from the machine.
WARNING
Crushing hazard. The lift cylinder
could become unbalanced and
fall if not properly supported and
secured to the lifting device.
4-4
Primary Boom Extension
Cylinder
The primary boom extension cylinder extends and
retracts the primary boom extension tube. The
primary boom extension cylinder is equipped with
counterbalance valves to prevent movement in the
event of a hydraulic line failure.
How to Remove the Primary
Boom Extension Cylinder
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: 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 Raise the primary boom to a horizontal
position.
2 Extend the primary boom until the primary
boom extension cylinder rod-end pivot pin is
accessible in the primary boom extension tube.
3 Remove the hose and cable guard from the
upper pivot.
Primary Boom Components
Summary of Contents for Z-51/30J
Page 62: ...52 Z 51 31J Part No 1268553GT October 2020 Service and Repair Manual Manifolds...
Page 64: ...54 Z 51 31J Part No 1268553GT October 2020 Service and Repair Manual Manifolds...
Page 71: ...October 2020 Part No 1268553GT Z 51 31J 61 Service and Repair Manual Manifolds...
Page 99: ...October 2020 Part No 1268553GT Z 51 31J 89 Service and Repair Manual Hydraulic Symbols Legends...
Page 106: ...October 2020 Service and Repair Manual 96 Platform Control Box Wiring Diagram Options...
Page 110: ...October 2020 Service and Repair Manual Electrical Schematic Options 100...
Page 111: ...October 2020 Service and Repair Manual 101 Electrical Schematic AS...
Page 112: ...102 Z 51 31J Part No 1268553GT October 2020 Service and Repair Manual Electrical Schematic AS...
Page 113: ...October 2020 Service and Repair Manual Electrical Schematic AS 103 Z 51 31J Part No 1268553GT...
Page 114: ...October 2020 Service and Repair Manual Electrical Schematic AS 104...
Page 115: ...October 2020 Service and Repair Manual Ground Control Box Terminal Strip Wiring Diagram AS 105...
Page 118: ...October 2020 Service and Repair Manual 108 Ground Control Box Switch Panel Wiring Diagram AS...
Page 119: ...October 2020 Service and Repair Manual 109 Platform Control Box Wiring Diagram AS...
Page 122: ...October 2020 Service and Repair Manual 112 Platform Control Box Switch Panel Wiring Diagram AS...
Page 123: ...October 2020 Service and Repair Manual 113 Electrical Schematic CE...
Page 124: ...October 2020 Service and Repair Manual Electrical Schematic CE 114 Z 51 31J Part No 1268553GT...
Page 125: ...October 2020 Service and Repair Manual Electrical Schematic CE 115 Z 51 31J Part No 1268553GT...
Page 126: ...October 2020 Service and Repair Manual 116 Electrical Schematic CE...
Page 127: ...October 2020 Service and Repair Manual 117 Ground Control Box Terminal Strip Wiring Diagram CE...
Page 130: ...October 2020 Service and Repair Manual 120 Ground Control Box Switch Panel Wiring Diagram CE...
Page 131: ...October 2020 Service and Repair Manual 121 Platform Control Box Wiring Diagram CE...
Page 134: ...October 2020 Service and Repair Manual 124 Platform Control Box Switch Panel Wiring Diagram CE...
Page 135: ...October 2020 Service and Repair Manual 125 Electrical Schematic Deutz TD 2 2 L3 Models CE...
Page 142: ...132 Hydraulic Schematic October 2020 Service and Repair Manual...
Page 143: ...Hydraulic Schematic October 2020 Service and Repair Manual 133 Z 51 31J Part No 1268553GT...