Low Fuel Warning Sender Sealing - Piper Navajo PA-31 Service Manual

ACCESS
COVER
PLATE
PIPER NAVAJO SERVICE MANUAL
B121
NUT MS21340-27
(TORQUE 35-50 IN.-LBS.)
MS20995C32
SAFETY WIRE
WASHER (AN960-816
GASKET
2F1-14523
TORQUE
35 ± 5 IN.-LBS.
SEALANT
MIL-S-8802-B1/2
-
(PRC-1422-B1/2)
PROBE
Figure 9-14. Low Fuel Warning Sender Sealing
9-64. LOW FUEL WARNING SENDER SEALING. (Refer to Figure 9-14.) The following instructions
and illustration explain the recommended procedures for sealing the low fuel warning probe to prevent any
possible fuel leakage:
a.
Defuel the aircraft to obtain a fuel level which is below the warning probe. and remove the access
cover plates on both wings above the probes. Disconnect the electrical knife splices at each probe.
b.
Remove hardware securing the probe assembly mounting plate to the fuel cells and lift the assembly
from the cells.
c.
Remove the cotter pin and castle nut or safety wire and plain nut and washer securing the probe
to the mounting plate, also remove and discard the gasket between the mounting plate and probe.
d.
Apply MIL-S-8802-B1/2 sealant (or equivalent) between the mounting plate and mounting surface
of the probe.
e.
Assemble the probe to the plate as shown in Figure 9-14, securing the probe in place with the washer
and plain nut. Torque the nut 35-50 inch-pounds and safety with MS20995C32 wire.
f.
Replace the special gasket P/ N 2F 1-2-14523 at the fuel cell opening and install the probe assembly
using the original hardware. Place the electrical ground wire terminal under one bolt head. Torque all bolts to
35 + 5 in.-lbs., and check installation for leaks.
g.
Connect electrical knife splice. Apply zinc chromate tape or equivalent to the cover plate mounting
flange and install access plates. Remove any excess zinc chromate tape from edges of access plates.
Revised: 3/2/84
FUEL SYSTEM
3C12