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

  TM-9-2320-272-23-1 - Page 270 of 1313

FIELD MAINTENANCE
GENERAL TROUBLESHOOTING INDEX
GENERAL TROUBLESHOOTING INDEX
Malfunction/Symptom
Troubleshooting Procedure
ENGINE
1.
Engine Will Not Crank.
......................................................................................................................
WP
0006
2.
Engine Cranks But Will Not Start.
.....................................................................................................
WP
0007
3.
Starter Cranks Engine Slowly, Hard To Start.
...................................................................................
WP
0008
4.
Engine Stops During Normal Operation.
...........................................................................................
WP
0009
5.
Engine Stops When Accelerator Is Returned To Idle Position.
.........................................................
WP
0010
6.
Engine Fails To Stop.
........................................................................................................................
WP
0011
7.
Engine Runs, But Misfires.
................................................................................................................
WP
0012
8.
Engine Idle Rough Or Erratic.
...........................................................................................................
WP
0013
9.
Poor Acceleration And/Or Lack Of Power.
........................................................................................
WP
0014
10.
Engine Surges.
..................................................................................................................................
WP
0015
11.
Excessive Oil Consumption.
..............................................................................................................
WP
0016
12.
Low Oil Pressure.
..............................................................................................................................
WP
0017
13.
Engine Oil Contaminated.
.................................................................................................................
WP
0018
14.
Excessive Vibrating Or Clunking.
......................................................................................................
WP
0019
15.
Excessive Fuel Consumption.
...........................................................................................................
WP
0020
16.
Engine Cranks But Will Not Start In Cold Weather (Fuel System
Operating Properly).
..........................................................................................................................
WP
0021
17.
Exhaust Color Blue During Normal Operation.
..................................................................................
WP
0022
18.
Exhaust Color White During Normal Operation.
................................................................................
WP
0023
19.
Exhaust Color Black During Normal Operation And Idle.
..................................................................
WP
0024
20.
Excessive Exhaust Noise.
.................................................................................................................
WP
0025
21.
Exhaust Fumes In Cab.
.....................................................................................................................
WP
0026
22.
Engine Does Not Reach Normal Operating Temperature.
................................................................
WP
0027
23.
Engine Overheats.
............................................................................................................................
WP
0028
24.
Loss Of Coolant.
...............................................................................................................................
WP
0029
25.
Contaminated Coolant.
.....................................................................................................................
WP
0030
TRANSMISSION
1.
Excessive Noise During Shifting.
......................................................................................................
WP
0031
TM 9-2320-272-23-1
0005
0005-1


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