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 - Page 146 of 288
TM 9-2540-207-14&P
5-102
Wiring Harnesses (continued)
14.
Using a #1 cross-tip screwdriver, remove two (2) screws (on the inside face of the Top
Housing) holding Resistor (R1) to the underside of the Top Housing.
15.
Remove the Fuel Pump (ref. 5.9.3) to allow access to Wiring Harness Plate.
16.
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.
17.
Remove Wiring Harnesses from Wiring Harness Plate by sliding grommets out of keyed
slot in Wiring Harness Plate.
18.
Remove Wiring Harnesses by sliding them up through the Top Housing.
5.9.8.1.2 Installation
1.
Inspect Secondary Air duct and replace if necessary.
Ensure duct is attached to Top
Housing end with two 1" metal spring clamps.
Note: Ensure Wiring Harnesses are installed on their respective sides of
the Top Housing.
2.
Install Wiring Harness connectors J1, J6 and Resistor R1 down through the top of the
Top Housing at the Fuel Pump end.
3.
Install Wiring Harness connectors J1, J6 and Thermocouples T1 and T2 down through
the top of the Top Housing at the Fuel Pump end.
4.
Install MS Power connector (J2) by running it to the front of the Top Housing and
inserting it through the hole in the Top Housing. Ensure that the MS Power connector
keyway is positioned so that when the connector is secured, the key is located on the
bottom side of the connector. Apply Loctite 243 (blue) to two (2) screws, place two (2)
lock washers on these screws and secure the MS Power connector by inserting the
screws into the connector from the front of the Top Housing. Tighten with a #1 cross-tip
screwdriver.
5.
With the Top Housing on its side, fuel inlet facing upwards, pull the Wire Harness tight,
and re-install Logic Harness and
Power Harness rubber grommets onto the Feed-Thru
Plate.
Seal around grommet with RTV.
6.
Using a #2 cross tip screwdriver, secure the Feed-thru Plate to the Top Housing with
four (4) self tapping screws installed from the top side of the Top Housing into the Feed-
thru Plate which is on the underside of the Top Housing.
7.
Re-install the Power Main Capacitor (C2) into the metal clamp located beside the Fuel
Pump. Tighten the bolt found on the side of the Capacitor clamp.
8.
Using Loctite 243 (blue) and a screwdriver, tighten the screw holding the Power Inductor
(L1) clamp to the Burner Fan Plate.
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