Piper Navajo PA-31 Service Manual page 559

PIPER NAVAJO SERVICE MANUAL
CAUTION
New ferrules must be used and inserted under the braid
exactly as stated in step 6.
7. Pull the lead back into the cover to wedge the braid between the tapers of the
cover and ferrule.
8. Provide a back up support for the cover, and seat the ferrule, using the 11-7074
Ferrule Seating Tool (refer to Figure 8B-18) and a mallet. Ferrule must be driven straight
into the cover and fully seated.
9. Thread the pre-stripped end of conductor through grommet. Place a new eyelet
on conductor and crimp per instructions given in second paragraph of Maintenance of
Harness, 8B-24.
f.
When lead being replaced is of the elbow type, salvage the used elbow and
compression springs for installation on replacement lead. Install these and new sleeve and
contact spring, (refer to Figures 8B-19 and 8B-20) furnished with replacement lead per
instructions given in steps a thru d.
g. Reposition clamps and brackets and replace cable ties removed earlier. Clean the
grommets, sleeves and the inside of the cover with Methylethylketone or denatured alcohol.
h. Spray grommets and sleeves with Fluorocarbon Spray, such as MS S-122, supplied
by Miller-Stephenson
Chemical
Co., Inc., 16 Sugar Hollow
Road, Danbury,
Connecticut 06810, or equivalent.
i. Prior to seating spark plug lead terminal in plug barrel, use fluorocarbon spray on
spark plug terminal insulating sleeve (refer to Figure 8B-21), to prevent heat from sticking
sleeve to spark plug barrel. Lightly lubricate the shoulder of ferrule to minimize twisting of
ferrule. (Refer to Figure 8B-22.) Use GO-JO NO LOK manufactured by Goger Inc., Akron,
Ohio 44309.
j. Check cam securing screw. Non-self locking must be torqued to 16-20 inch-pounds.
For self-locking screw, refer to the latest revision of Lycoming Service Instructions No. 1400.
k. With all high tension terminal grommets seated against the ferrules in the cover,
attach the bottom capacitor lead to the right main breaker and then the top capacitor lead
to the left main breaker. Position the cover on the magneto and secure. Torque cover screws
to 30-35 inch-pounds.
NOTE
Do not connect leads to spark plugs until after completing
test of starting vibrator per instructions in paragraph 8B-27.
1. Carefully route the high tension spark plug leads away from any hot spots such as
manifolds and sharp edges which might cause heat damage or chafing. Check leads for
proper location in clamps so when clamps are tightened the leads will not be crushed. Leads
should be taut to prevent chafing due to vibration, but not so taut as to produce undue
strain on leads.
m. After all leads have been properly routed and secured to the engine, recheck all
clamp securing screws for tightness. Fasten coupling nuts to proper spark plugs and torque
as specified in Table VIIIB-II. Do not allow ferrules to turn while torquing nuts.
Revised: 9/24/81
POWER PLANT
2L13