TM 5-3895-383-24
Testing & Adjusting
Troubleshooting
Troubleshooting can be difficult. The Troubleshooting Index
gives a list of possible problems. To make a repair to a
problem, make reference to the cause and correction on the
pages that follow.
This list of problems, causes, and corrections will only give an
indication of where a possible problem can be, and what
repairs are needed. Normally, more or other repair work is
needed beyond the recommendations in the list.
Remember that a problem is not normally caused only by one
part, but by the relation of one part with other parts. This list is
only a guide and cannot give all possible problems and
corrections. The serviceman must find the problem and its
source, then make the necessary repairs.
NOTE:
For each problem, a list of possible causes and
corrections is given. The list of probable causes
and corrections should be performed in numeric
sequence.
Troubleshooting Problem List
1.
Engine Crankshaft Will Not Turn
When Ignition Switch Is On ..........................................31
2.
Engine Hard To Or Will Not Start
Engine Crankshaft Turns Too Slowly .........................31
3.
Engine Hard To Or Will Not Start
Engine Crankshaft Turns Freely .................................32
4.
Engine Misfiring Or Running Rough ..........................34
5.
Engine Stall At Low RPM ..............................................36
6.
Knock Or Miss At Idle ...................................................36
7.
Rough Idle .......................................................................37
8.
Low Power ......................................................................37
9.
Engine Speed Is Not Stable .........................................38
10.
Engine Overspeeds On Start .......................................39
11.
Too Much Vibration........................................................39
12.
Loud Combustion Noise................................................39
13.
Valve Train Noise ..........................................................40
14.
Oil In Cooling System ...................................................41
15.
Mechanical Noise (Knock) In Engine .........................41
16.
Fuel Consumption Too High ........................................41
17.
Too Much Valve Lash ...................................................42
18.
Little Or No Valve Lash ................................................42
19.
Oil At The Exhaust ........................................................42
20.
Engine Has Excessive Early Wear .............................42
21.
Coolant In Lubrication Oil ............................................43
22.
Too Much Exhaust Smoke (Black Or Gray) ..............43
23.
Too Much Exhaust Smoke (White Or Blue) ..............45
24.
Engine Has Low Oil Pressure .....................................46
25.
Engine Uses Too Much Lubrication Oil .....................47
26.
Above Normal Coolant Temperature .........................48
27.
Below Normal Coolant Temperature .........................50
28.
Exhaust Temperature Too High ..................................50
29.
Starter Motor Does Not Turn .......................................51
30.
Alternator Gives No Charge ........................................51
31.
Alternator Charge Rate Is Low
Or Not Regular ..............................................................51
32.
Alternator Charge Too High ........................................52
33.
Alternator Has Noise ....................................................52
34.
Fuel In Lubrication Oil ..................................................52
35.
Fuel In Coolant ..............................................................53
36.
Loss Of Coolant .............................................................53
37.
Air Inlet Heater (If Equipped) .......................................54
38.
Soot In The Inlet Manifold ............................................55
39.
Air In Fuel ......................................................................55
6-30
