TM 5-4520-256-14
5-4. HEAT EXCHANGER MAINTENANCE - Continued.
a.
Removal.
(1)
Remove nut (2).
(2)
Remove four screws (6), four lockwashers (5), four flat washers (4), and sealing plate (3).
(3)
Remove cap nut (19), two nuts (16), two lockwashers (17), and two flat washers (18).
(4)
Remove two nuts (14), two lockwashers (13), two flat washers (12), and rod (15).
(5)
Remove nut (7), nut (9), rod (10), hose (11), and perforated plate (8) from air intake tube of heat
exchanger.
(6)
Repeat for other two rods.
(7)
Slide heat exchanger (20) out of heater unit.
(8)
Remove nut (21) and sightglass tube (1) from rear of heat exchanger (20).
b.
Cleaning.
WARNING
Cleaning solvent, Federal Specification P-D-680, is toxic and flammable. Use only in a well-
ventilated area. Avoid prolonged breathing of fumes. Keep solvent away from flames. Do not
use in excessive amounts. Avoid skin contact.
(1)
Clean heat exchanger with cleaning solvent (item 11, Appendix E).
(2)
Allow to dry.
c.
Installation.
(1)
Install sightglass tube (1) and nut (21) to rear of heat exchanger (20).
(2)
Slide heat exchanger (20) into heater unit. Be sure sightglass tube fits into hole in heater unit.
(3)
Install two nuts (14), two flat washers (13), and two lockwashers (12) to rod (15).
(4)
Install two flat washers (18), two lockwashers (17), two nuts (16), and cap nut (19).
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