Piper Navajo PA-31 Service Manual page 556

PIPER NAVAJO SERVICE MANUAL
To replace grommets or eyelets, pull the conductor through the shielding sufficiently to
make eyelet accessible. Remove the eyelet being careful not to damage conductor wire.
Replace grommet and eyelet using the "AB" groove of Crimping Tool No. 1 1-4152 or a pair
of diagonal pliers modified as shown in Figure 8B-13. Work the wire back into the shielding
so the grommet fits properly against the ferrules in the plate. Slack in shielding or wire can
be removed by grasping the lead in one hand and sliding the other hand firmly along the
lead towards the magneto cover.
To replace contact springs, insulating sleeves, compression spring or elbows, proceed as
follows:
a. Using a Bendix 11-7073 needle or a mechanical pencil with the lead retracted, hook
the end of the contact spring as shown in Figure 8B-14.
b. Using the needle or pencil, unscrew the spring.
c. Slide insulating sleeve and spring retainer assembly off end of lead assembly.
d. Replace defective component and reassemble as follows:
1. Fabricate a tool as shown in Figure 8B-15 for installing the insulating sleeves
over cable terminals.
2. Slide elbow assembly over lead and attach nut finger tight to ferrule.
3. Push the fabricated tool through insulating sleeve and spring retainer assembly as
shown in Figure 8B-16. Screw the cable terminal into the tool.
4. Work insulating sleeve and spring retainer assembly into position over the cable
and unscrew the tool. Install contact spring on cable terminal.
NOTE
It may be necessary to lubricate the cable and insulating
sleeve with a thin film of DC 200 (200,000 centistokes) or
commercial grade alcohol to facilitate assembly.
e. To replace one of the lead assemblies, proceed as follows:
1. Remove clamps and brackets from defective lead assembly. Cut cable ties from
assembly and discard.
2. Cut the eyelet from the lead and remove grommet.
3. Grip the ferrule of the lead with a pair of vise gripe or water pump pliers and
with a twist-pull action remove the ferrule from the cover and discard ferrule. Pull lead from
cover.
4. Thread pre-stripped end of replacement lead through cover.
NOTE
Replacement leads are available from Bendix in lengths of 17
thru 74 inches in 3 inch increments. Use nearest next longer
length to replace defective lead.
5. Scrape blue coating being careful not to cut braid for .50 of an inch from end of
lead.
6. Push back braid and thread a new ferrule over wire and under braid until braid
just covers knurling. (Refer to Figure 8B-17.)
Reissued: 10/12/79
POWER PLANT
2L10