TM 5-3825-226-24
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
1.
Engine Will Not Start.
2.
Misfiring or Running Rough.
3.
Stall at Low rpm.
4.
Sudden Changes in Engine rpm.
5.
Not Enough Power.
6.
Too Much Vibration.
7.
Loud Combustion Noise.
8.
Loud Noise (Clicking) From Valve
Compartment.
9.
Oil in Cooling System.
10.
Mechanical Noise (Knock) in Engine.
11.
Fuel Consumption Too High.
12.
Loud Noise From Valves or Valve Drive
Components.
13.
Little Movement of Rocker Arm and Too
Much Valve Clearance.
14.
Valve Spring Lock is Free.
15.
Oil at the Exhaust.
16.
Little or No Valve Clearance.
17.
Engine Has Early Wear.
Item
Problem
18.
Coolant in Lubrication Oil.
19.
Too Much Black or Gray Smoke.
20.
Too Much White or Blue Smoke.
21.
Engine Has Low Oil Pressure.
22.
Engine Uses Too Much Lubrication Oil.
23.
Engine Coolant is Too Hot.
24.
Starting Motor Does Not Turn.
25.
Alternator Gives No Charge.
26.
Alternator Charge Rate is Low or Not Regular.
27.
Alternator Charge Too High.
28.
Alternator Has Noise.
29.
Exhaust Temperature is Too High.
30.
Compressor Passes Excessive Oil
31.
Noisy Compressor Operations
32.
Excessive Buildup and Recovery Time
33.
Compressor Fails to Unload
34.
Compressor Leaks Oil
35.
Compressor Constantly Cycles
36.
Compressor Head Gasket Failure
2-23
