TM 5-4520-244-14
Organizational Maintenance Troubleshooting Chart. .. Cont
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
EXCESSIVE SMOKE IN HEATER EXHAUST
6.
Possible cause: incorrect nozzle spray pattern
Step 1.
Clean nozzle, or replace if defective
Step 2.
Engine operating below specified speed
Refer to TM5-2805-14 and adjust engine to speed
range between 3450-3750 rpm
Step 3.
Check for correct air/fuel mixture (high altitude)
Refer to TM5-2805-14 for high altitude carburetor
adjustment
Check fuel pump discharge pressure
Step 4.
(Ref. fig. 4-8)
7.
COMBUSTOR FLAME-QUT ON OVERHEAT
Step 1.
Inspect for damaged capillary on heat sensor
Replace heat sensor
Step 2.
Fuel control valve sensor improperly positioned in air stream
Adjust sensor to correct position
Step 3.
Inspect for icing in burner nozzle bypass
Remove nozzle, clean, reinstall
8.
INCORRECT OR FLUCTUATING DISCHARGE AIR TEMPERATURE
Step 1.
Inspect for defective
temperature
gage
Replace with
functioning
component
Step 2.
Inspect for defective
temperature
selector valve
Replace with
functioning
component
9.
MAXIMUM HEAT OUTPUT NOT OBTAINABLE
Step 1.
Check for fuel system leak
Tighten all fittings
Step 2.
Test for defective fuel pump (See fig. 4-8)
Repair or replace fuel pump
Step 3.
Check fuel filter for clogged condition
Replace filter element
4-10
