4-23. ENGINEER'S HEATER ASSEMBLY (cont)
CLEANING, INSPECTION, AND REPAIR
flammable. Wear protective goggles and gloves and
use only in a well-ventilated area. Avoid contact
with skin, eyes, and clothes and don't breathe
vapors. Do not use near open flame or excessive
heat. The flash point is 100 - 138°F (38 - 59°C). If
you become dizzy, get fresh air and medical aid
immediately. If contact with eyes is made, wash
your eyes and get medical aid immediately.
Clean parts (except motor) in dry-cleaning solvent.
Compressed air used for cleaning purposes will not
exceed 30 psi (207 kPa). Do not direct compressed
air against skin. Use goggles or full face shield.
Clean motor by blowing off dust and dirt with compressed air. If necessary to remove oil or grease, use a cloth
dampened with dry-cleaning solvent.
Inspect parts for cracks, breaks, and damage.
Inspect heater core for bent fins, loose tubes, leaks, and damage.
Inspect motor for damage. Check brushes for serviceability.
Repair consists of replacement of damaged parts.
Position switch (42) in heater frame and install four screws (40) and lockwashers (41). Install knob (39) on switch
and install screw (38). Connect wires to switch and remove tags.
Position resistor (37) in heater frame and install two screws (36), flat washers (35), lockwashers (34), and nuts
(33). Connect wires to resistor and remove tags.
Place fan guard (29) on radiator core (30) and install four screws (31) and lockwashers (32 Position fan guard
and manifold in heater frame and install four screws (26), lockwashers (27), and flat washers (28).