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 TM 9-4120-425-14&P
HEATER SUBASSEMBLY UNIT MAINTENANCE - Continued
0028-00
REMOVAL - Continued
8.
Bracket (29) and grommet (19) can remain in place unless damaged.
9.
Refer to WP 0027-00 for unit maintenance of cutout switches (22) and (25).
INSTALLATION
1.
Clean heater brackets (10 and 29) with warm soapy water and lint free cloth (Item 9, WP 0121-00).
2.
Replace terminal board TB4(17) if terminals are missing or unserviceable.
3.
Replace marker strip (18) if cracked, missing or cannot be easily read.
4.
Insert heater elements (3) and insulator (14) into heater support bracket (11).
5.
Secure each heater element (3) to heater support bracket (10) using flat washer (13), lockwasher (12) and nut (11).
6.
If disassembled, secure cutout switch mounting bracket (29) with its switches (22 and 25) to heater support bracket
(10) with three screws (26) and three lockwashers (27).
7.
Slide heater angle bracket (7) over ends of heating elements (3).
8.
Place the heater subassembly into the housing, line-up screw holes.
9.
Secure heater support bracket (10) into unit using six screws (8) and six lockwashers (9).
10. Connect unit power leads to terminal board TB4(17) and remove tags.
11. Install junction box. See WP 0035-00.
12. Install circuit breaker panel and control module. See WP 0033-00 and WP 0034-00.
13. Install top covers. See WP 0019-00.
0028-00-3
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