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TM 10-6630-247-13&P
4-14. DISTILLATION UNIT MAINTENANCE- cont.
b.
Cleaning. Refer to figure 4-4.
(1)
Using wiping rag, remove fuel deposits, oils, and dust from refractory (2).
(2)
Clean sides of heater housing (8) with wiping rag,
c.
Inspection. Refer to figure 4-4.
(1)
Inspect heater housing (8) for cracks, dents and evidence of overheating.
(2)
Check for bent or cracked control knob (10), Knob should turn smoothly in both direction,
(3)
Inspect power cord (9) for cuts, torn insulation or damaged plug.
NOTE
Distillation unit heater does not have an insulating spacer installed
under the refractory.
(4)
Inspect heating element (4, figure 4-5) for burned, broken or shorted coils.
(5)
Inspect refractory (6) for cracks, broken or missing pieces, and loose or missing terminal
lugs (5).
d.
Repair. Refer to figure 4-5.
(1)
Remove two screws (1) and flat washers (2) securing heating element leads (3) to lugs (5).
(2)
Straighten element leads (3) and pull defective element (4) from top of refractory (6). -
NOTE
It will be necessary to stretch the coils of the replacement heater element
to fit around refractory dividers.
(3)
Place new heater element (4) on top of refractory (6) with element leads (3) positioned
through refractory (6) at lugs (5).
(4)
Stretch coils of heating element (4) around dividers (7) as shown.
(5)
Loosely install two flat washers (2) and screws (1) in lugs (5).
(6)
Wrap element leads (3) around screws (1), then tighten screws,
4-14
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