TM 5-4520-208-15
clogging. Refer to TM 6-2806-208-14
b. Removal.
for procedures on removal and repair
(1) On Model BT400-40 heaters, remove
of the fuel filter body.
by disengaging cabinet latches.
(2) On Model BT400-40-1 heaters, dis-
d. Inspection.
engage cabinet latches and open cab-
(1) Position gasket and sediment bowl
inet.
in fuel filter body.
(3) Loosen knurled nut on the bail and
(2) Hinge bail to fuel filter body. Secure
release bail from sediment bowl.
the bowl on fuel filter by tightening
(4) Remove sediment bowl and gasket
knurled nut.
from fuel filter body.
(3) Secure cabinet in place and engage
c. Cleaning and Inspection.
cabinet latches.
(1) Clean the filter bowl with an approved
solvent and dry thoroughly.
49. Gasoline Engine Power Unit Air
(2) Examine the bowl gasket for evidence
Cleaner Servicing
of leakage. Replace a defective gasket.
(3) Inspect wire filter screen in fuel filter
Refer to TM 5-2805-208-14 for procedures
on servicing the gasoline engine air cleaner.
body for sediment or other evidence of
Section V. TROUBLESHOOTING
53. Electric Motor Power Unit Lacks Power
50. General
Possible remedy
Probable cause
This section provides information useful in
Vaneaxial fan rubbing on Tighten mounting cap
diagnosing the correcting unsatisfactory opera-
fan mounting ring.
screws to aline fan or
replace damaged part
tion or failure of the heater and its compo-
nents. Each trouble symptom stated is fol-
Motor bearings defective -- Replace motor, (para 12).
lowed by a list of probable causes of the trouble.
The possible remedy recommended is described
54. Electric Motor Power Unit Stops
opposite the probable cause. Any trouble be-
Suddenly
yond the scope of organizational maintenance
Possible remedy
Probable cause
shall be reported to direct support mainte-
Electric cable broken --- Replace cable (para 106).
nance.
ON-OFF switch defective__ Replace ON-OFF switch
51. Gasoline Engine Power Unit Troubles
55. Electric Motor Power Unit Runs Hot
Refer to TM 5-2805-208-14 for trouble-
Possible remedy
Probable cause
shooting procedures relating to the Model
Tighten fan mounting cap
Vaneaxial fan robbing
1A08-III Military Standard Engine.
screws to aline fan or
on fan mounting
replace damaged part
ring.
Connect to proper power
Line voltage low from
52. Electric Motor Power Unit Fails to
source.
power source.
Start or is Hard to Start
Insufficient ventilation__ -- Check screen in air inlet
door. Screen may be
Possible remedy
Probable cause
clogged, restricting air
Tighten connection at
Connection loose or
flow. Clean screen.
power source.
incomplete at power
source.
56. Electric Motor Power Unit Noisy
Electric cable broken ______ Replace cable (para 106).
Possible remedy
Probable cause
Motor fan binding---__-Strighten bent cover or
Motor bearings worn __ -- Replace motor (para 12).
replace damaged fan.
37
