Service Manual
February 2022
Mast Components
70
GRC
™
Part No. 1314708GT
10-2
Wear Pads
Wear pads on the GRC are used to provide a
uniform fit between the mast sections, as the mast
assembly extends and retracts. Over time, it may
be necessary to replace the wear pads to ensure
good machine performance.
How to Adjust the Wear Pads
1 Refer to Repair Procedure,
How to Remove
the Mast Assembly.
2 Refer to Repair Procedure,
How to
Disassemble the Mast
.
3 Refer to Repair Procedure,
How to Assemble
the Mast
.
10-3
Lift Cylinders
The lift cylinder is equipped with a normally closed
solenoid valve to prevent movement in the event
of a hydraulic line failure.
How to Re mov e th e Lift C ylinde r
How to Remove the Lift Cylinder
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 Refer to Repair Procedure,
How to Remove
the Mast Assembly.
2 Remove the nylock nuts securing the lift
cylinder, to the cylinder mast mount brackets,
located inside the top half of the mast
assembly. Set the nylock nuts to the side.
3 Tag, disconnect and plug the hydraulic hoses
from the lift cylinder. Cap the fittings on the
cylinder.
4 Remove the lift cylinder retaining bolt from the
lower cylinder block and set to the side.
Summary of Contents for Genie GRC-12
Page 113: ...February 2022 Service Manual 101 Electrical Schematic GRC Options...
Page 115: ...February 2022 Service Manual 103 Electrical Schematic GRC from GRC11 1000 to GRC11 1078...
Page 118: ...Service Manual February 2022 106 Electrical Schematic GRC from GRC11 1000 to GRC11 1078...
Page 119: ...February 2022 Service Manual 107 Electrical Schematic GRC from GRC11 1079 to GRC14 1780...
Page 122: ...Service Manual February 2022 110 Electrical Schematic GRC from GRC11 1079 to GRC14 1780...
Page 123: ...February 2022 Service Manual 111 Electrical Schematic GRC from GRC14 1781 to GRC15 2343...
Page 126: ...Service Manual February 2022 114 Electrical Schematic GRC from GRC15 2344 to GRC16P 2481...
Page 127: ...February 2022 Service Manual 115 Electrical Schematic GRC from GRC16P 2482 to GRC16P 2562...
Page 130: ...Service Manual February 2022 118 Electrical Schematic GRC from GRC16P 2563 to GRCP 5999...
Page 131: ...February 2022 Service Manual 119 Hydraulic Schematic GRC from GRC11 1000 to GRC12 1168...
Page 135: ......