TM 5-4940-200-35
CHAPTER 2
GENERAL MAINTENANCE INSTRUCTIONS
Section I. SPECIAL TOOLS AND EQUIPMENT
illustrated in TM 5-4940-200-35P.
5. Special Tools and Equipment
No special tools or equipment are required for
7. Specially Designed Tools and Equipment
the maintenance of this shop set.
No specially designed tools or equipment are
required for the maintenance of this shop set.
6. Field and Depot Maintenance Repair
Field and depot maintenance repair parts are listed and
Section II. TROUBLESHOOTING
8. General
This section provides information useful in
Probable cause
Possible remedy
diagnosing and correcting unsatisfactory operation or
failure of the shop set and its components. Each trouble
Cycle selector switch...........Replace cycle selector
symptom stated is followed by a list of probable causes
switch defective
of the trouble. The possible remedy recommended is
described opposite the probable cause.
Field rheostat defective .......Replace a defective rheo-
9. Engine Speed Fluctuates
Ten-range switch
Repair or replace the ten-
Probable caus e
Possible remedy
defective.
Governor defective .............Repair or replace the gover-
Field circuit open.................Inspect the field rheostat
and connections to rheo-
stat . Repair or replace a
Governor adapter drive........Repair or replace the gov-
defective rheostat
defective
ernor adapter drive
Generator-welder
Test and repair generator-
defective.
10. Generator-Welder Will Not Start or Come Up To
Speed
Circuit breaker defective- .....Repair or replace a defec-
Probable cause
Possible remedy
tive circuit breaker
Power takeoff damaged
Repair or replace the power
Welding polarity control
Replace a defective welding
switch defective
polarity control switch
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