TM 5-6115-434-12
(2)
Visually inspect for burned, bent, loose, corroded, or otherwise damaged connectors. Inspect insulation for
burns, chafing, breaks, deterioration, or other obvious damage.
c.
Test. Connect ignition lead assembly to a satisfactory ignition unit and a satisfactory igniter plug. Connect a 28v
dc -power source. Lead assembly must transmit voltage from ignition unit to igniter plug, causing igniter plug to spark
consistently at a rate of 10 sparks per second maximum.
d. Installation. Reconnect satisfactory or replacement ignition lead assembly to ignition unit and to igniter plug.
3-50. Time Totalizing Meter (fig. 3-15)
a.
Removal
(1)
Remove four attaching screws and washers from engine bracket and remove time totalizing meter bracket
from engine.
(2)
Remove wiring harness leads; remove four attaching bolts and washers, and remove time totalizing meter
from bracket.
b.
Installation.
(1)
Install replacement time totalizing meter on time totalizing meter bracket and secure with attaching
washers and bolts. Tighten bolts securely.
(2)
Reconnect wiring harness leads.
(3) Install time totalizing meter bracket in engine bracket and secure with attaching washers and screws.
Tighten screws securely.
3-51. Circuit Breaker (fig. 3-15)
a.
Removal.
(1)
Remove four attaching screws and washers from engine bracket and remove time totalizing meter bracket
from engine.
(2)
Remove wiring harness leads from circuit breaker.
(3)
Remove attaching nut and washer from bracket and remove circuit breaker.
b.
Installation.
(1)
Install replacement circuit breaker in time totalizing meter bracket. Secure with attaching washer and nut.
(2)
Connect wiring harness leads to circuit breaker.
(3) Install time totalizing meter bracket in engine bracket and secure with attaching washers and screws.
Tighten screws securely.
3-52. Exhaust Gas Thermocouple (fig. 3-15)
a.
Removal.
(1)
Remove wiring harness leads from thermocouple.
(2)
Remove two special attaching bolts and washers and remove thermocouple from engine exhaust flange.
b.
Installation
(1)
Coat threads of special attaching bolts with thin film of compound (Fel-Pro C-6).
(2)
Install replacement thermocouple in engine exhaust flange.
(3)
Secure thermocouple with washers and coated special attaching bolts. Tighten bolts to 50 to 75 inch-
pound torque.
(4) Reconnect wiring harness leads to thermocouple.
Note
Insure chromel lead is matched to CR marking and alumel lead is matched to AL marking.
Section X. INSTRUMENT AND CONTROLS PANEL ASSEMBLIES
3-53. General
The instrument and controls panel assemblies consist of the instrument panel, conditioned air system circuit breaker
panel, and environment control panel. The panels provide instruments and controls for operation and for monitoring
operation of the various power unit 3-54 functions. Wiring harness assemblies provide interconnection between the
instruments and controls and the operating components.
3-54. Wiring Harness Assemblies
a.
Removal. Remove wiring harness assemblies as required for access to other components or for repair.
3-54
