TM 5-3805-260-24
TROUBLESHOOTING
Troubleshooting can be difficult. On the following pages there is a list of possible problems. To make a
repair to a problem, make reference to the cause and correction.
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 can not give all possible problems and corrections. The
serviceman must find the problem and its source, then make the necessary repairs.
TROUBLESHOOTING SYMPTOM INDEX
Item
Problem
Item
Problem
1.
Engine Will Not Start.
18.
Coolant in Lubrication Oil.
2.
Misfiring or Running Rough.
19.
Too Much Black or Gray Smoke.
3.
Stall at Low rpm.
20.
Too Much White or Blue Smoke.
4.
Sudden Changes in Engine rpm.
21.
Engine Has Low Oil Pressure.
5.
Not Enough Power.
22.
Engine Uses Too Much Lubrication Oil.
6.
Too Much Vibration.
23.
Engine Coolant is Too Hot.
7.
Loud Combustion Noise
24.
Starting Motor Does Not Turn.
8.
Loud Noise (Clicking) From Valve Com-
25.
Alternator Gives No Charge.
partment.
26.
Alternator Charge Rate is Low or Not Regular.
9.
Oil in Cooling System.
27.
Alternator Charge Too High.
10.
Mechanical Noise (Knock) in Engine.
27.
Alternator Charge Too High.
11.
Fuel Consumption Too High.
28.
Alternator Has Noise.
12.
Loud Noise From Valves or Valve Drive
29.
Exhaust Temperature is Too High.
Components.
30.
Compressor Passes Excessive Oil
13.
Little Movement of Rocker Arm and Too
31.
Noisy Compressor Operations
Much Valve Clearance.
32.
Excessive Buildup and Recovery Time
14.
Valve Spring Lock is Free.
33.
Compressor Fails to Unload
15.
Oil at the Exhaust.
34.
Compressor Leaks Oil
16.
Little or No Valve Clearance.
35.
Compressor Constantly Cycles
17.
Engine Has Early Wear.
36.
Compressor Head Gasket Failure
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