TM-9-2320-272-23-2
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 2 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-2 - Page 337 of 1417
References (cont.)
Volume 3, WP
0491
Volume 3, WP
0504
Volume 3, WP
0505
Volume 3, WP
0506
Volume 3, WP
0507
Volume 3, WP
0509
Volume 3, WP
0510
Volume 3, WP
0539
Volume 3, WP
0541
Volume 3, WP
0544
Volume 4, WP
0559
Volume 4, WP
0560
References (cont.)
Volume 4, WP
0672
Volume 4, WP
0673
Volume 4, WP
0714
Volume 5, WP
0790
Volume 5, WP
0819
Volume 5, WP
0820
Equipment Condition
Vehicle parked and shut down.
(TM
9-2320-272-10)
Table
1.
Field Preventive Maintenance Checks and Services.
ITEM
NO.
INTERVAL
ITEM TO BE
CHECKED OR
SERVICED
PROCEDURE
EQUIPMENT
NOT READY/
AVAILABLE IF:
1
Semiannual
Starter
NOTE
Prior to road test, perform all Before opera-
tions and Weekly checks listed in
TM
9-2320-272-10 in addition to those that
follow.
Start engine (TM 9-2320-272-10). While starting engine,
listen for unusual noises and difficult cranking.
Starter is inoperative or
makes excessive grinding
noise.
2
Semiannual
Accelerator
Pedal and
Engine
a.
Observe response to accelerator pedal.
Accelerator pedal is
sticking or binding.
(1)
Listen for unusual noises.
(2)
Observe for hesitation or varying idle speed.
(3)
Check for sticking or binding of pedal. If
accelerator pedal binds or sticks, troubleshoot (Volume
1, WP
0004).
b.
Be alert for excessive vibration, fuel odor, oil,
coolant or exhaust dripping, and any indication of
malfunction.
Engine knocks, rattles, or
smokes excessively.
3
Semiannual
Throttle
Check throttle control travel and freedom of movement.
Pull throttle control all the way out, rotate, and release.
Throttle control should return to original position.
If
control sticks or binds, lubricate (Volume 5, WP
0820)
or replace (WP
0270).
Throttle control is sticking
or binding.
TM 9-2320-272-23-2
0207
0207-2
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