TM 55-2835-209-23
Section XII INSTALL IGNITION UNIT
5-12 INSTALL IGNITION UNIT
INITIAL SETUP
TOOlS:
Aircraft Inspection Tool Kit (T49)
Engine Repairman"s Tool Kit (T47)
Torque Wrench 30-150 inch-pounds
Personnel Required:
68B Aircraft Powerplant Inspector
68B Aircraft Powerplant Repairer
Materials/Parts:
Lockwire (D43)
EquiRment Conditions:
APU on Aircraft
General Safety Instructions:
Voltages used can cause arcing
which may result in severe
burns.
Use extreme care when
working with ignition system.
Failure to observe all precau-
tions may result in serious
injury or death.
1.
2.
3.
NOTE
The ignition unit is equipped
with a open circuit safety re-
sistor which will allow bleed
off of stored electrical charge
when input power is removed.
Prior to assembly, all compo-
nents will be visually in-
spectad for damage.
Position ignition unit (1) on lower
two mount bolts.
Install upper two
mount bolts (3) and washers (2).
Torque bolts to 38 to 42
inch-pounds.
Install ignter plug lead (4) to
lower end of ignition unit (1).
Torque to 33 to 37 inch-pounds.
Lockwire igniter plug lead with
lockwire (D43).
Connect APU wiring harness elec-
trical connector (5) to upper end of
ignition unit.
Lockwire connector
with lockwire (D43).
FOLLOW-ON MAINTENANCE: None.
5-24
