February 2022
Service Manual
Checklist E Procedures
Part No. 1314708GT
GRC
™
27
E-1
Test or Replace the Hydraulic Oil
Genie specifications require that this procedure be
performed every 2000 hours or every two years,
whichever comes first.
Replacement or testing of the hydraulic oil is
essential for good machine performance and
service life. Dirty oil and a clogged suction strainer
or hydraulic filters may cause the machine to
perform poorly and continued use may cause
component damage. Extremely dirty conditions
may require oil changes to be performed more
frequently.
Note: Before replacing the hydraulic oil, the oil
may be tested by an oil distributor for specific
levels of contamination to verify that changing the
oil is necessary. If the hydraulic oil is not replaced
at the 2000 hour inspection, test the oil quarterly.
Replace the oil when it fails the test.
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.
Note: Perform this procedure on a firm, level
surface with the machine in the stowed position.
Testing the oil:
1 Complete the hydraulic oil testing with an oil
distributor.
If the hydraulic oil passes testing at the
2000 hour maintenance interval, the oil must
be tested every quarter by an oil distributor
until the oil fails the test and is replaced.
If the hydraulic oil fails testing at the
2000 hour maintenance interval, the oil must
be replaced. After the oil has been replaced,
continue the scheduled quarterly maintenance
inspection.
Replacing the hydraulic oil:
1 Tag and disconnect the hydraulic tank return
hard line from the hydraulic filter head and
remove the hard line from the tank. Cap the
fitting on the filter head.
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.
2 Tag and disconnect the hydraulic pump inlet
hard line and remove the hard line from the
tank. Cap the fitting on the pump.
3 Remove the hydraulic tank retaining fasteners
and remove the hydraulic tank from the
machine.
4 Drain all of the oil into a suitable container.
Refer to
Machine Specifications
, for capacity
information.
Note: When replacing the hydraulic oil, it is
recommended that the hydraulic tank be cleaned
using a mild solvent and all hydraulic filters and
strainers be replaced.
5 Clean up any oil that may have spilled.
Properly discard the used oil.
6 Clean the inside of the hydraulic tank using a
mild solvent. Allow the tank to dry completely.
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: ......