TM-9-2540-207-14-P

HEATER, VEHICULAR COMPARTMENT, MODEL: A20

TECHNICAL MANUAL; OPERATOR, FIELD, AND SUSTAINMENT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST

JULY 2007
TM-9-2540-207-14-P

  TM-9-2540-207-14-P - Page 150 of 288

TM 9-2540-207-14&P
5-106
Wiring Harness (continued)
5.9.8.2.1 Removal
1.
Remove Top Cover (ref TM 5.4.1).
2.
Remove Top Shell (ref. TM 5.4.2).
3.
Remove Bottom Shell (ref.TM 5.4.3).
4.
Disconnect the modular connectors (
1,2
) that attach to the Vent Fan Driver Board.
5.
Disconnect the fuel line (
3
) to the burner.
6.
Disconnect the modular connector (
4
) from the vent temp sensor.
7.
Using a 7/16" open ended wrench, remove the Burner Sensor from the Port.
8.
Using a 7/16" open ended wrench, remove the Exhaust Sensor from the Port.
9.
Using pliers, release the 1" metal spring clamp at the Secondary Air Duct from the Heat
Exchanger end. Slide the spring clamp over the hose and release onto the Top Housing
end so that the Secondary Air Duct and two spring clamps are attached to Top Housing.
Be careful that the spring clamp does NOT damage the Secondary Air Duct.
!CAUTION!
DO NOT set the Top Housing on the Secondary Air Duct Hose.
Place the Top Housing on it’s side with the fuel inlet fitting facing upwards.
10.
Using a #2 cross-tip screwdriver, remove the four (4) screws that hold the Top Housing
to the Heat Exchanger.
Lift the Top Housing away from the Heat Exchanger.
11.
Remove Wiring Harness connectors from the Fuel Injector (
5
), (rotate the Injector
upwards to release the connector), the Fuel Pump (
6
), EMI board (
7
), Diagnostic Display
(
8
) and the Power Board (
9
).
12.
With the Top Housing on its side, use a #2 cross-tip screwdriver to remove the screw
holding the Power and Wiring Harness P-clip (
10
) attached to the underside of the Top
Housing.
13.
Remove the Fuel Pump (ref. TM 5.9.3) to allow access to Wiring Harness Plate.
14.
Using a #2 cross-tip screwdriver, remove the four (4) self tapping screws from the Wiring
Harness feed-thru plate by which it is fastened to the Top Housing. Remove the Plate.
15.
Remove Wiring Harnesses from Wiring Harness Plate by sliding grommets out of keyed
slot in Wiring Harness Plate.
16.
Remove Wiring Harness by sliding it through the Top Housing.


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