Service Manual
February 2022
Checklist B Procedures
16
GRC
™
Part No. 1314708GT
Models without maintenance-free or sealed
batteries:
9 Remove the battery vent caps and check the
specific gravity of each battery cell with a
hydrometer. Note the results.
10 Check the ambient air temperature and adjust
the specific gravity reading for each cell as
follows:
•
Add 0.004 to the reading of each cell for
every 10° / 5.5° C above 80° F / 26.7° C.
•
Subtract 0.004 from the reading of each
cell for every 10° / 5.5° C below 80° F /
26.7° C.
Result: All battery cells display an adjusted
specific gravity of 1.277 or higher. The battery
is fully charged. Proceed to step 11.
Result: One or more battery cells display a
specific gravity of 1.217 or below. Proceed to
step 8.
11 Perform an equalizing charge OR fully charge
the batteries and allow the batteries to rest at
least 6 hours.
12 Remove the battery vent caps and check the
specific gravity of each battery cell with a
hydrometer. Note the results.
13 Check the ambient air temperature and adjust
the specific gravity reading for each cell as
follows:
•
Add 0.004 to the reading of each cell for
every 10° / 5.5° C above 80° F / 26.7° C.
•
Subtract 0.004 from the reading of each
cell for every 10° / 5.5° C below 80° F /
26.7° C.
Result: All battery cells display a specific
gravity of 1.277 or greater. The battery is fully
charged. Proceed to step 11.
Result: One or more battery cells display a
specific gravity from 1.218 to 1.269. The
battery is still usable, but at a lower
performance. The battery will need to be
recharged more often. Proceed to step 11.
Result: One or more battery cells display a
specific gravity from 1.217 to 1.173. The
battery is approaching the end of it's life.
Proceed to step 11.
Result: The difference in specific gravity
readings between cells is greater than 0.1 OR
the specific gravity of one or more cells is
1.172 or less. Replace the battery.
14 Check the battery acid level. If needed,
replenish with distilled water to 1/8 inch /
3 mm below the bottom of the battery fill tube.
Do not overfill.
15 Install the vent caps and neutralize any
electrolyte that may have spilled.
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: ......