TM 9-4120-378-14
4.35 HEATER ELEMENTS. - continued
Action
Remarks
Location/Item
Removal
Remove insulation (20) from bracket (11) using a
j.
Continued
scraper.
Toluolene is flammable and its vapors
can be explosive. Repeated or prolonged
skin contact or inhalation of vapor can be
toxic. Use in well-ventilated area and
keep away from sparks or flame. Use
goggles, gloves, and apron when ap-
propriate.
Installation
a.
Clean heater mounting bracket (11) with toluo-
Iene (Item 27, Appendix E) and lint free cloth
(Item 9, Appendix E).
b.
Measure and cut piece of unicellular plastic foam
insulation (Item 25, Appendix E).
Apply adhesive (Item 18, Appendix E) to foam
.c.
insulation heater mounting bracket (11) using
acid swab brush (Item 29, Appendix E) and allow
to become tacky.
Press foam insulation (20) firmly into place.
d.
Replace terminal board TB2 if terminals are mis-
e.
sing or unserviceable.
Replace marker strip (16) if cannot be easily
f.
read, if cracked, or missing.
Insert heater elements (3) and insulator (15) into
g.
heater mounting bracket (11).
h.
Secure each heater element (3) to heater mount-
ing bracket (11) using flat washer (14), lockwash-
er (13) and nut (12).
Install heater mounting bracket (11) in unit using
i.
three screws (9) and three Iockwashers (10).
Slide heater support bracket (8) over ends of
j.
heating elements (3).
Secure heater support bracket (8) to housing us-
k.
ing two Iockwashers (6), two flat washers (7), and
two screws (5).
