Section V. TROUBLESHOOTING
Probable cause
Possible remedyu
41. General
Brushes improperly seated _ Seat brushes (par. 79).
This section provides information useful in diag-
Commutators rough or
Clean and polish commutators
dirty.
nosing and correcting unsatisfactory operation or
Field rheostat incorrectly
Adjust or replace a defective
failure of the shop set and its components. Each
adjusted or defective.
field rheostat (par. 20).
trouble symptom stated is followed by a list of
probable causes of the trouble. The possible remedy
46. Generator-Welder Output Too High
recommended is described opposite the probable
Probable cause
Possible remcdy
cause. Any trouble beyond the scope of organiza-
Ten-range switch in-
Adjust ten-range switch cor-
correctly adjusted.
rectly (par. 20).
tional maintenance will be reported to field mainte-
Cycle selector switch in
Place cycle selector switch in
nance, third echelon.
wrong position.
correct position (par. 17).
42. Generator-Welder Will Not Start (Power
47. Governor Does Not Maintain Constant
Takeoff Drive)
Engine Speed
Probable cause
I'ossible remedy
Probable cause
Possible remedy
Power takeoff not engaged.
Engage power takeoff (par. 16).
Drive V-belt improperly
Adjust drive V-belt (par. 64).
Power takeoff shift lever or
Repair or replace the power
adjusted.
linkage defective.
takeoff lever and/or linkage
Linkage out of adjustment_
Adjust linkage (par. 62).
Engine surging -----
Adjust governor (par. 62).
Power takeoff clutch
Adjust power takeoff clutch
Remove adapter drive cable,
Governor adapter drive
slipping.
clean and install (par. 64)..
cable sticking in shield.
43. Generator-Welder Will Not Start (Electric
48. Generator-Welder Will Not Come Up To
Drive)
Speed
Probable cause
Possible remedy
Probable cause
Possible remedy
No line voltage ___ _
Check line voltage.
Motor-generator switch not
Position motor-generator switch
Power takeoff not engaged _
Engage power takeoff (par. 20).
in MOTOR ON position.
Governor adapter drive
Adjust governor adapter drive
Overload trip reset button
V-belts improperly
Press overload trip reset button
V-belts (par. 64).
adjusted.
tripped.
(par, 17).
Declutcher lever not
Power takeoff clutch
Disengage declutcher lever (par.
Adjust power takeoff clutch
disengaged.
17).
slipping.
44. Generator-Welder Has No Output
49. Alternating Current Power From Gen-
Probable causee
Possible remedy
erator-Welder Lacking
Weld-off-engine start switch
Put weld-off-engine start switch
Probable cause
Possible remedy
in wrong position.
in proper position (pars. 16
Brushes not seated
Reseat brushes (par. 79).
and 17).
properly.
Burned or excessively worn
Replace brushes (par. 79).
Brushes sticking in brush
Clean brush holders (par. 79).
brushes.
holders.
Welding cables loose. -----
Tighten welding cables (par.
Adjust brush spring tension
Improper brush spring
tension.
Brushes improperly seated _
Seat brushes (par. 79).
Clean and polish commutator
Commutator dirty or
Commutators rough or
Clean and polish commutators
rough.
dirty.
Properly position motor gen-
Motor generator switch not
Improper brush spring
Adjust brush spring tension
erator switch (par. 20).
in GENERATOR ON
tension.
position.
Loss of residual magnetism-
Magnetize exciter field (par.
Press overload trip reset button
Overload trip reset
80).
button tripped.
Clean brushes and brush holders
Brushes sticking in brush
45. Generator-Welder Output Too Low
holders.
Probable cause
Possible remedy
Field rheostat defective ---
Replace field rheostat (par. 20).
Cycle selector switch in
Place cycle selector switch in
wrong position.
correct position (par. 17).
50. Welding Voltage Too Low
Burned or worn brushes---
Replace brushes (par. 79).
Possible remedy
Probable cause
Improper brush spring
Adjust brush spring tension
tension.
Brushes worn -------------
Replace brushes (par. 79).
Ten-range switch in-
Adjust ten-range switch (par.
Tighten brush connections (par.
Brush connections loose .
20).
correctly adjusted.
79).
TAGO 5672-A
