TM-9-2320-272-23-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-1 - Page 296 of 1313
ENGINE CRANKS BUT DOES NOT START - Continued
T0039DAA
Figure 11.
Fuel System.
b.
Check fuel shut off solenoid and circuitry, and emergency fuel shutoff.
c.
Visually inspect AFC standard pump filter for dirty or clogged condition (Volume 2, WP
0259).
d.
Visually inspect fuel pump with VS governor filter for dirty or clogged condition (Volume 2, WP
0260).
(M936A1 and M928 models)
e.
Visually check primary fuel filter for leaks or damage (Volume 2, WP
0258).
f.
Check fuel lines and connections for leaks, obstructions, and damage.
g.
Tighten all connections where a leak is detected.
CONDITION/INDICATION
IS FUEL SYSTEM IN GOOD OPERATING CONDITION?
DECISION
NO - Fuel filter leaking or damaged. Replace fuel filter (Volume 2, WP
0258). Go to Step (22) to verify problem
is solved.
NO - Bad fuel lines. Replace fuel lines (Volume 2, WP
0254). Go to Step (22) to verify problem is solved.
NO - Bad AFC standard pump filter. Replace AFC standard pump filter filter (Volume 2, WP
0259). Go to
Step
(22) to verify problem is solved.
NO - Bad fuel pump with VS governor filter. Replace fuel pump with VS governor filter (Volume 2, WP
0260).
Go to Step (22) to verify problem is solved.
YES - Go to Step (12).
TM 9-2320-272-23-1
0007
0007-11
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