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 TM 9-4120-430-14
0036 00
2.
If unrepairable, replace terminal board.
3.
Inspect marker strip for illegibility or damage.
4.
Replace marker strip if damaged.
TEST
1.
Test heater elements (18) by checking for continuity between the two electrical leads (12 and 13) of each heater
element. Refer to schematic diagram (WP 0038 00). If continuity does not exist, replace element.
2.
Test heater cutout switch S3. See WP 0034 00.
REMOVAL
1.
Remove heater cutout switch S3. See WP 0034 00.
2.
Verify wire labels to wiring list (WP 0038 00) and disconnect leads to terminal board TB3.
3.
Remove two screws (1), lockwashers (2), and flat washers (3) securing heater support bracket (4) to unit housing.
4.
Remove one screw (5) and lockwasher (6) securing heater support bracket (7) to unit housing.
5.
Remove three screws (8) and lockwashers (9) securing heater mounting bracket (7) to inner bulkhead of unit
housing.
6.
Lift heater assembly (10) from unit housing, sliding bracket (7) away from H-channel seal (11).
DISASSEMBLY
1.
Remove heater support bracket (4) from ends of heating elements (18).
2.
For each heater element (18), disconnect leads (12 and 13) to TB3. Refer to wiring list and schematic WP 0038 00.
3.
For each heater element (18), remove nut (14), internal tooth lockwasher (15) and flat washer (16) securing heater
element (18) to heater element mounting bracket (19).
4.
Slide each heater element (18) from heater element mounting bracket (19).
5.
Remove flat washer (16) and insulator washer (17) from each heater element (18).
6.
Remove terminal board (TB3) (20) and marker strip (21) by removing two screws (22) and lockwashers (23).
7.
With TB3 removed, remove bracket (19) from bracket (7) by removing two screws (24) and lockwashers (25).
0036 00-2
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