TM 5-3431-201-10
Section IV. TROUBLESHOOTING
36. Engine Exhaust Smoke Excessive
31. General
Probable cause
Possible remedy
This section provides information useful in
Air cleaner clogged ............ .Service air cleaner
diagnosing and correcting unsatisfactory operation or
Engine operating
failure of the welding machine and its components.
temperature too low.
Close radiator shutter with
Each trouble symptom stated is followed by a list of
manual control and
probable causes of the trouble. The possible remedy
report condition to
recommended is described opposite the probable cause.
organizational main-
Any operational trouble beyond the scope of the
tenance.
operator shall
be reported to organizational
maintenance.
37. Engine Lacks Power
Probable cause
Possible remedy
32. Engine Hard to Start or Fails to Start
Fuel strainer and fuel
Service the fuel strainer
Probable cause
Possible remedy
filter clogged.
and fuel filter (pars.
Fuel tank empty ................. Fill tank (par. 6).
50 and 51).
Water or dirt in fuel ............ Service fuel strainer and
Air cleaner clogged ............ Service air cleaner
.....................................
fuel filter (pars. 50 and
.....................................
51). Drain and flush fuel
.....................................
tank. Refill tank.
38. Engine Knocks-or Develops Excessive Noise
Starting procedure............... Refer to starting instruc-
Probable cause
Possible remedy
improper. ......................
tions (par. 13).
Fuel grade improper ........... Drain and refill tank with
Battery leads loose or.......... Tighten leads or clean
proper grade of fuel
terminal corroded.......... . terminals (par. 49),.
Oil level low ....................... Add oil to crankcase and
33. Engine Stops Suddenly
bring up to proper
Probable cause
Possible remedy
level. Refer to current
Oil pressure low ................. Inspect oil level. Add oil to
lubrication order.
proper level or report
Caution:
condition to organiza-
If the engine knocks or is noisy when
tional maintenance.
the crankcase oil is at the proper
Fuel tank empty ................. Fill tank (par. 6).
level, stop the engine. Immediately
Air cleaner clogged ............. .Service air cleaner
report the condition to organizational
High-coolant temperature
Add water to radiator
maintenance. Continued use could
switch operates.
cause serious damage to the engine.
34. Engine Overheats
39. Welder Runs But Will Not Generate Current
Probable cause
Possible remedy
Probable cause
Possible remedy
Coolant level low ................ Add water to radiator
Polarity reversing switch
Place handle in positive or
may be in the neutral
negative position.
Cooling system clogged ..... Service cooling system
position.
Fan V-belts slipping ............ Adjust V-belts. par. 48).
40. Arc is Loud and Spatters Excessively
Exhaust system clogged ..... .Remove restriction.
Probable cause
Possible remedy
Polarity may be wrong ........ Inspect polarity. Reverse
35. Engine Oil Pressure Low
polarity or try an
Probable cause Possible remedy
electrode of the opposite
Crankcase oil level low ....... Add oil and bring up to
polarity.
proper level. Refer to
current lubrication
41. Winterization Heater Fails to Ignite
order.
or Keep Burning
Probable cause
Possible remedy
No fuel pressure ................. Inspect the fuel supply;
add fuel if necessary.
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