Piper Navajo Chieftain PA-31-350 Service Manual page 492

NAVAJO CHIEFTAIN SERVICE MANUAL
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 8-29.)
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 8-30) 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, 8-78.
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 8-31
and 8- 32) 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 8-33) to prevent heat from sticking sleeve to spark plug barrel. Lightly
lubricate the shoulder of ferrule to minimize twisting of ferrule. (Refer to Figure 8-34.) Use GO-JO NO LOK
manufactured by Go-Jo Inc.. Akron. Ohio 44309.
j. Check cam securing screw. Screw must be torqued to 16-20 inch-pounds.
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 8-83.
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 or 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 VIII-II. Do not allow
ferrules to turn while torquing nuts.
Revised: 10/5/83
POWER PLANT
2J5