Specifications

MARATHONNORCO AEROSPACE, INC.
NICKEL-CADMIUM AIRCRAFT BATTERIES
24-34-00
Page 1101
MAY 10/11
11.0 BATTERY DISASSEMBLY AND REASSEMBLY
CAUTION: Exercise care when working around the battery. Avoid the use of uninsulated tools - severe
arcing may result with possible harm to personnel and damage to the tools and a cell or cells in
the battery.
Rings, metal watchbands and identification bracelets should be removed. In contact with intercell
connectors of opposite polarity, metal objects may fuse themselves to the connectors and cause
severe skin burns. Keep flames away from the battery.
11.1 Battery Disassembly
Before disassembling the battery, make sure that all cells are completely discharged. This may
be accomplished as follows:
1. Discharge the battery to approximately 0.5 volts per cell, and attach shorting clips (Refer to
Paragraph 7.0 and Paragraph 8.0).
2. After all cells have been discharged, remove the shorting clips. Remove all intercell connecting
links. The cells may now be removed. Use a cell puller if necessary. When removing cells from
a battery. Always tighten the puller to the cell and use an even, straight-up pull.
11.2 Battery Reassembly
1. Lightly polish the cells’ terminal surfaces with an eraser and wipe clean.
2. Reassemble the cells into the battery can. Position the cells correctly with respect to polarity as
shown on the illustrated parts list (IPL) applicable to the particular battery being serviced. DO
NOT HAMMER TIGHT CELLS INTO THE BATTERY CAN: USE A STEADY FORCE ON THE
TERMINALS TO PRESS THEM INTO PLACE. FOR EASIEST ASSEMBLY, THE CELL AT THE
MIDDLE OF A ROW SHOULD BE INSERTED LAST.
3. Place intercell connectors, and other components, in their correct position as shown on the
Illustrated Parts List (IPL).
4. Install all hardware finger-tight.
CAUTION: Use only cells, intercell connectors, power connectors and all other battery components that are
specified on the battery parts list for your battery. Failure to do so will result in imbalances
between the cells within the battery and could create a safety of flight issue.