Removal And Installation Of Battery; Battery Box Corrosion Prevention; Cleaning Of Vent Hoses And Vents - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
11-50. REMOVAL AND INSTALLATION OF BATTERY.
a. Remove the forward panel of the nose baggage compartment.
b.
Reach to the forward base of the battery box and remove the cap bolts securing the box to its
mounting platform.
c.
Disconnect the vent line from each side of the box.
d. Remove the battery box cover.
e. Disconnect the battery cables.
NOTE
Always remove the ground cable first and install last to prevent
accidental short circuiting or arcing.
f. Tip the box aft enough to remove the battery.
g.
The battery may be installed in reverse order of removal.
11-51. BATTERY BOX CORROSION PREVENTION. The following check against corrosion within the
battery box should be performed at least every 30 days.
a.
Open the clamp at bottom right rear corner of the battery box and drain off any electrolyte that
may have overflowed into the box.
b. Check terminals and connections for corrosion. Corrosion effects may be neutralized by applying
a solution of baking soda and water mixed to the consistency of thin cream.
CAUTION
Do not allow soda solution to enter battery.
Repeat application until all bubbling action has ceased.
c. Wash battery and box with clean water and dry.
d.
Close battery box drain tube clamp.
e. As necessary, paint the battery box with an acid resistant paint.
f. Check battery vent tubing is not blocked or kinked. Replace as necessary.
11-51a. CLEANING OF VENT HOSES AND VENTS. Due to the required length of the vent lines the
following cleaning process should be used:
a.
Visually inspect the vent hoses for cracks, kinks, and loose connections. Replace only with special
acid proof hoses from the parts manual. (DO NOT REPLACE VENT LINES WITH ORDINARY RUBBER
HOSE.)
b.
At the disconnected ends. in the battery compartment, slowly pour the soda solution into the vent
hoses via a small funnel. The height of the hoses at this end will provide a siphon effect and the solution will
flow out the bottom fuselage vents.
c.
Follow with a final purge of clear water and blow out the lines with low air pressure.
NOTE
This procedure proves the vent lines are not kinked or restricted and
that they are neutralized.
d.
Wipe down the vents, ram air tubes. and aircraft belly with the soda solution and rinse with clear
water. Then apply a fresh coating of high quality aircraft wax to this entire area.
Revised: 10/5/83
ELECTRICAL SYSTEM
3D19