Piper Navajo PA-31 Service Manual page 751

PIPER NAVAJO SERVICE MANUAL
11-77 HYDROMETER READING AND BATTERY CHARGE PER CENT.
Hydrometer Readings
1280
1250
1220
1190
1160
1130 or below
Per Cent of Charge
100
75
50
25
Very little useful capacity
Discharged
11-78. REMOVAL OF BATTERY AND BATTERY BOX. The battery box is located
behind the forward panel in the forward baggage compartment.
a. Open forward baggage compartment door.
b. Remove the screw type fasteners from the forward panel in the forward baggage
compartment and remove panel.
c. Remove the screws from the four flanges at the corners of the battery box.
d. Disconnect the drain and vent hoses secured with hose clamps from the nose cone
fittings.
e. Disconnect wire from fuse at quick disconnect fastener.
f. Tilt battery box toward front of nose cone enough so that the bottom of the box is
above forward baggage compartment floor and slide forward.
g. Disconnect the two battery leads from the battery box, on the top left side of the
battery box.
NOTE
Always remove ground cable first and install last to prevent
accidental short circuiting or arcing.
h. Remove two nuts securing relay to left side of battery box and lay relay aside.
i.
Remove the battery box cover secured with screws.
j.
Remove the electrical straps from the two battery terminals.
k. Remove battery from battery box.
1. Remove battery and battery box from aircraft.
11-79
a.
b.
INSTALLATION OF BATTERY AND BATTERY BOX.
Place battery into battery box.
Place electrical straps on battery terminals and secure.
Reissued: 10/12/79
ELECTRICAL SYSTEM
4D1