Quantcast MALFUNCTION 1: Manifold heater inoperative-(Continued) - TM-9-2815-220-240166

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TM 9-2815-220-24
INTAKE MANIFOLD HEATER ABNORMAL OPERATION
0023 00
MALFUNCTION 1: (Continued)
Manifold heater inoperative.
PROCEDURE
OBSERVATION
ANALYSIS
Fuel System Checks
WARNING
Keep hands away from nozzle during test.
Note fuel with each firm stroke
Purge Pump: Disconnect
Moderate flow with each
of purge pump.
purge pump fuel hose quick
stroke indicates normal purge
disconnect coupling at
pump operation.
engine main fuel back flow
valve. Hold coupling valve
If flow is not evident, purge
open and operate purge
pump is defective, or purge
pump.
lines are blocked or leaking.
See appropriate vehicle
technical manual.
Note fuel flow with each stroke
Fuel Filter: Disconnect fuel
Moderate flow with each
of purge pump.
tube between fuel check
stroke indicates no in-line
valve tee and manifold
filter restriction. Filter
heater fuel filter and
satisfactory.
operate purge pump.
No flow, or restricted flow,
indicates filter is plugged.
See appropriate vehicle
technical manual.
WP 0023 00-4

 


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