February 2022
Service Manual
Mast Components
Part No. 1314708GT
GRC
™
59
5 Remove the fasteners securing the lower rear
access cover to the chassis and remove the
cover. Set the cover and the fasteners to the
side.
6 Tag and disconnect the wire harness from the
platform down valve coil at the base of the lift
cylinder.
7 Remove the retaining nut securing the
platform down coil to the platform down
solenoid valve and remove the coil. Set the
coil and retaining nut to the side.
8 Remove the platform down solenoid valve
from the lift cylinder. Set the valve to the side
and plug the cylinder port.
9 Remove the fasteners securing the top mast
cover to the top of the mast. Set the cover
and fasteners to the side.
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.
10 Using an overhead supporting device, attach
a sling equipped with the appropriate sized
hooks to the lifting eyes located inside the
mast assembly. Support the mast. Do not
apply any lifting pressure.
Note: Mast weight is 500 lbs / 227 kg.
11 Working at the non-steer end of the lower
chassis, remove the mast retaining fasteners
and set the fasteners to the side.
12 Carefully pull the cables and hydraulic hoses
free while removing the mast from the
machine.
Crushing hazard. The mast will
fall unless it is properly
supported when it is removed
from the base.
Component damage hazard.
Cables and hoses can be
damaged if they are kinked or
pinched.
13 Place the mast assembly on a suitable
structure capable of supporting it.
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: ......