Charging The Battery; Battery Box; Maintenance Of Battery Box; Battery Contactor - Cessna T182 Series Service Manual

MODEL 182 & T182 SERIES SERVICE MANUAL
16-21. CHARGING THE BATTERY. When the bat-
tery is to be charged, the level of the electrolyte
should be checked and adjusted by adding distilled
water to cover the tops of the internal battery plates. Do not allow acid deposits to come in contact
Remove the battery from the aircraft and place in a with skin or clothing. Serious acid burns may
well ventilated area for charging. result unless the affected area is washed im-
mediately with soap and water. Clothing will
When a battery is being charged, hydrogen Inspect the cleaned box and cover for physical damage
and oxygen gases are generated. Accumula- and for areas lacking proper acid proofing. A badly
tion of these gases can create a hazardous damaged or corroded box should be replaced. If the
explosive condition. Always keep sparks box or lid require acid proofing, paint the area with
and open flame away from the battery. acid proof paint Part No. CES1054-529, available
from the Cessna Service Parts Center.
Allow unrestricted ventilation of the battery
area during charging. 16-26. BATTERY CONTACTOR.
The main points of consideration during a battery 16-27. DESCRIPTION. Thru 18266523 and F18200144
charge are excessive battery temperature and vio- the battery contactor is bolted to the side of the bat-
lent gassing. Test the battery with a hydrometer
tery box. Beginning with 18266524 and F18200145 the
to determine the amount of charge.
Decrease the contactor is bolted to a bracket adjacent to the battery.
charging rate or stop charging temporarily if the
The contactor is a plunger type contactor which is
battery temperature exceeds 125°F. actuated by turning the master switch on.
When the
master switch is off, the battery is disconnected from
16-22. BATTERY BOX. (THRU 18266523 AND
the electrical system. A silicon diode is used to
F18200144). eliminate spiking of transistorized radio equipment
The large terminal of the diode connects to the battery
16-23. DESCRIPTION. The battery is completely terminal of the battery contactor. The small terminal
enclosed in an acid resistant plastic box which is of the diode and the master switch wire connect to the
riveted to mounting brackets in the tailcone. The coil terminal of the battery contactor. (See figure
box has a vent tube which protrudes through the 16-2.)
bottom of the aircraft allowing battery gases and
spilled electrolyte to escape. 16-28.
REMOVAL AND INSTALLATION. (See figure
16-2.)
16-24. REMOVAL AND INSTALLATION. (See figure a.
THRU 18266523 AND F18200144.
16-2.) The battery box is riveted to the mounting 1.
Remove the battery box cover and disconnect
brackets in the tailcone. The rivets must be drilled
the ground cable from the negative battery terminal
out to remove the box. and pull cable clear of battery box.
2. Remove the nut. lockwasher and the two plain
16-25. MAINTENANCE OF BATTERY BOX. The
washers securing the battery cables to the battery
battery box should be inspected and cleaned periodi- contactor.
cally. The box and cover should be cleaned with a 3.
Remove the nut. lockwasher and the two plain
strong solution of bicarbonate of soda (baking soda) washers securing the wire which is routed to the
and water. Hard deposits may be removed with a master switch.
wire brush. When all corrosive deposits have been 4.
Remove the silicon diode which is connected
removed from the box. flush it thoroughly with clean to the battery terminal and the coil terminal.
water.
5. Remove the bolt. washer and nut securing each
16-15