8.
Cushion
9.
Cushion Retainer
10.
"O" Ring Seal
11.
Gear
Figure 4-1. Magneto and Harness Assembly Section4 OVERHAUL MANUAL LYCOMING 76 SERIES AIRCRAFT ENGINES
IgnitionSystem
accessories. Consult the manufacturer's applicable overhaul manual for inspection procedures.
REPAIR AND REPLACEMENT
4-10. Ignition Harness. Unless the harness assembly is in obviously new condition and is known to have been recently installed, it is recommended that the harness be replaced at overhaul. Lycoming does supply in-dividual leads in two lengths, (48 or 72 inch) finished at the spark plug end and available from your local distributor. The following steps will describe the pro-cedure for replacing a lead.
4-11. Removal of Condemned Lead. Remove clamps and brackets from applicable lead assembly. Cut cable ties from assembly and discard. Remove the cover from magneto.
4-12. Cut off condemned lead flush with the outer surface of the cover. Grip eyelet of lead with a pair of pliers and pull short length of conductor out of grommet and cover. Using a 3 inch long, 0.270 inch diameter drift, applied at outer surface of cover, drive out tapered ferrule and re-maining pieces of insulation and shielding.
4-13. Replacement of Condemned Lead. To replace a con-demned lead, proceed as follows:
a.
Thread pre-stripped end of lead through magneto cover.
b.
Scrape 1/2 inch of blue coating from braid being careful not to cut braid.
c.
Push back braid and thread a new ferrule over wire and under braid until braid covers knurling. See figure 4-2.
BRAID TO 1/2 INCH COATING EDGE OF KNURLING SCRAPEDFROM BRAID
BLUE
COATING
Figure 4-2. Ferrule Position Under Braid
d.
Pull the lead back into the cover to wedge the braid between the taper of the cover and ferrule.
e.
Place cover on proper support and seat ferrule using Bendix tool 11-7074 (ferrule seat tool) and mallet. Fer-rule must be driven straight into cover and fully seated.
f.
Place grommet over pre-stripped end of lead. Place new eyelet on conductor and cramp.
g.
Pull lead to seat parts in proper place and remove slack from braid.
4-14. Magnetos. As previously mentioned, this overhaul manual will not endeavor to describe overhaul procedures for trade accessories. Consult the manufacturer's ap-plicable manual for overhaul procedures.
REASSEMBLY
4-15.Magnetos. Before assembling the magneto gear or drive coupling (whichever is applicable) to the magneto drive shaft, apply a light coating of Go-Jo-No-Lox No. 72 compound or equivalent to the tapered section of the magneto drive shaft. This compound is manufactured by Gojer, Inc. Akron, Ohio, 44309. After assembling gear or coupling, wipe excess compound from the drive shaft. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：莱康明发动机大修手册 OVERHAUL MANUAL LYCOMING 76 SERIES AIRCRAFT ENGINES(13)
