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TM 10-3930-673-20-1
2-16. MECHANICAL SYSTEM TROUBLESHOOTING
This paragraph covers mechanical system troubleshooting. The Mechanical System Fault Index, Table 2-7, lists faults for the
mechanical system of the ATLAS. Refer to schematics found at the end of this volume when performing test and corrective
actions.
Table 2-7. Mechanical System Fault Index
Fault
Page
Number
Description
No.
1
Starter does not turn engine, turns engine slowly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
Engine cranks but does not start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
Engine starts but does not continue to run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
Engine starts but idles roughly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
Engine surges, changes speed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
Engine runs roughly, misfires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7
Engine RPM does not reach rated speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
Engine produces excessive white exhaust smoke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9
Engine produces excessive black exhaust smoke. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17
Engine produces excessive noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
Engine oil pressure below normal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11
Engine oil pressure above normal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12
Engine water temperature below normal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13
Engine water temperature above normal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15
Transmission oil temperature above normal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15
Transmission disconnect slow or malfunctioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14
Steering pulls to right or left. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16
Service brakes chatter, are noisy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18
Brakes drag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19
Service brakes do not stop vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20
Parking brake does not engage/disengage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21
Compression knocks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23
Loss of power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24
Engine does not shut off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
25
Cab heater does not heat cab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26
Air conditioner does not cool cab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
27
Arctic heater does not operate correctly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-769.0

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