TM
5-3431-203-15
Section IV. OPERATOR'S MAINTENANCE
3-9. General
The instructions in this section are pub-
lished for the information and guidance of
personnel responsible for the operator's main-
tenance of the welding machine and are in
addition to those listed in paragraph 3-7.
Figure 3-4. Pilot lamps, removal and installation.
Section V. TROUBLESHOOTING
Probable
cause
Possible
remedy
3 - 1 1 . General
Interlock switch defective ---- Replace switch (para
This section provides information useful in
3-35).
diagnosing and correcting unsatisfactory oper-
3-13. Cooling Fan Does Not Operate
ation or failure of the welding machine and
its components.
symptom
Each
trouble
Possible
remedy
Probable cause
stated is followed by a list of probable causes
Repair or tighten terminal
Lead broken or terminal
of the trouble. The possible remedy recom-
loose.
mended is described opposite the probable
cause. Any trouble beyond the scope of or-
Fan motor defective --------- Replace motor (para
3-52).
ganizational maintenance shall be reported to
direct support maintenance.
3-14. Fan Assembly Noisy
Possible
remedy
Probable cause
3-12. Welding Machine Fails to Start
Mounting hardware loose ---- Tighten hardware (para
Possible
remedy
Probable cause
3-52).
Contractor open ----------- Reset contractor.
Fan blade loose ---------Tighten fan blade eetscrew
Power switch defective ----Replace switch (para
3-31).