TM 9-6115-664-13&P
4-36.
PREHEAT MODULE ASSEMBLY MAINTENANCE
This task covers inspection and repair.
INITIAL SETUP
Tools:
Equipment Condition:
Shop Equipment, Automotive Maintenance
APU Shut Down
and Repair (Item 1, App. B)
NATO Plug Disconnected
A.
REMOVAL.
NOTE
Discard and replace all lockwashers
and locknuts when removed.
1.
Open top front cover on enclosure by turning
latches.
2.
Disconnect two electrical connectors (1, 2, Figure
4-26) from preheat module (3).
3.
Disconnect ventilation hose (5) from preheat module
(3) by loosening clamp (4). It is not necessary to
disconnect hose from APU enclosure air vent.
4.
Remove preheat module (3) from engine by
removing four bolts (6), lockwashers (7), and
washers (8). Remove insulating pad (9).
5.
The preheat module is a non-repairable assembly.
Do not attempt to remove circuit board or electrical
connectors.
B.
INSPECTION.
1.
Inspect electrical wiring for cuts, abrasions, and bare
wire. Check wiring insulation for damage.
2.
Inspect electrical connectors for bent, broken, or
missing pins.
Figure 4-26. Preheat Module
4-90
