Coil Box Removal - Lycoming TEO-540-C1A Maintenance Manual

TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
B. Coil Assembly Installation
WARNING MAKE SURE THE BATTERY HAS BEEN DISCONNECTED FROM THE
(1) Apply a light coat of lubricant (petrolatum or DC-4) to the mating surface of the coil
assembly.
(2) Install the coil assembly in the coil box base (Figure 2) and slide it horizontally into the
silicone seal on the ignition lead.
(3) Install the bolt, new lock washer, and washer to attach the coil assembly to the lower half
of the coil box. Torque the bolt to the specified limits in the Standard Torque Tables in
the latest revision of the Service Table of Limits - SSP-1776.
(4) Install the harness connector to the coil assembly.
(5) Install the coil box lid per instructions in the "Close the Coil Box" section in this chapter.
(6) Connect the battery.
(7) Complete the operational test in Chapter 72-00.

3. Coil Box Removal

WARNING MAKE SURE THE BATTERY HAS BEEN DISCONNECTED FROM THE
ENGINE.
A. Remove coil box lid per instructions in the "Open the Coil Box" section in this chapter.
B. Release the clamps (Figure 1) that hold the spark plug wires.
C. Disconnect the ignition lead spark plug connector from all top and bottom spark plugs.
D. Feed the ignition leads where they are near the lower half of the coil box.
E. Label and disconnect 12 harness connectors from the 12 coil assemblies.
F. Cut and remove the tie-wraps that attach the engine harness to clamp bases on the coil box
base.
G. Remove the four screws, lock washers, and washers from the coil box pass thru plate (Figure
3). Discard the lock washers.
H. While lifting engine harness and pass thru plate, lift the coil box base clear of the mounting
studs and remove the coil box. Make sure that the spacers stay on the coil box mounting
studs.
© 2018 Avco Corporation. All Rights Reserved
November 2018
ENGINE.
Coil Box Detail
Figure 3
74-30
Page 341