INSTALLATION OF BATTERY
—CAUTION—
Check battery vent tubes for obstructions. Remove obstructions to
ensure positive airflow through battery box.
l. Ensure that battery and battery box have been cleaned and are free of acid.
2. Install battery in box.
3. Connect positive lead to positive battery terminal and secure.
4. Connect ground cable to negative battery terminal and secure.
—CAUTION—
Serial numbers 8611005 and up have an uncapped center vent.
Verify angled face of center vent is facing aft to ensure positive
airflow through battery box.
5. Install battery box cover and secure.
6. Install access panel.
TESTING BATTERY
The specific gravity check method is listed in chart 2405. If alternator output is known to be correct, the
question of battery capability can be more accurately determined with a load type tester.
CHARGING BATTERY
If battery is not up to normal charge, remove and recharge it starting with a charging rate of 4 amps and
finishing with 2 amps. A fast charge is not recommended.
CHART 2405. HYDROMETER READING AND BATTERY CHARGE PERCENT
HYDROMETER READING PERCENT OF CHARGE
l280 100
1250 75
1220 50
1190 25
l l60 Very little useful capacity
1130 or below discharged
BATTERY BOX CORROSION PREVENTION
Check battery for spilled electrolyte or corrosion at each 50 hour inspection or every 30 days, whichever
comes first. If corrosion is found in the box, on terminals or around battery, remove and clean both the box and
battery as follows:
24 - 34 - 00
Page - 24 - 38
Reissued: August 1, 1986
1J13
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
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