Section VI. TROUBLESHOOTING
2. Each malfunction
stated is followed
by a list
probable causes of the trouble. The corrective
This section provides information u s e f u l in
a c t i o n recommended is described opposite the
diagnosing and correcting unsatisfactory operation
or failure of the shop set and its components.
Malfunctions which may occur are listed in table 4-
a. Place power selector switch to
Dynamotor-welder will not start
a. Power selector switch in OFF
when internal power is used.
b. Increase RPM (para 2-13a).
b. RPM too low.
Interchange any two incoming power
E x t e r n a l power lines connected
wrong direction when external
power is used.
a. Air cleaner clogged.
h. Electric pressure switch defective
or out of adjustment.
Electric pressure switch defective or
out of adjustment.
5. Side lifting hydraulic system does
a. Air in hydraulic system.
b. Side lifting cylinder defective.
not operate properly.
c. Side lifting hydraulic pump
6. Sides lower too quickly or too
Adjust or replace flow control valve
Side lifting hydraulic pump flow
c o n t r o l v a l v e n o t adjusted
properly or defective.
Section VII. MAINTENANCE OF ELECTRICAL SYSTEMS
a. Removal. Remove the service and blackout
The shop set contains three electrical systems: A
b. Cleaning and Inspection.
24-volt D. C. system, an alternating current system,
(1) Clean all parts with approved cleaning
both 120- and 240- volts, and a D.C. welding
solvent and dry thoroughly.
system. The 24-volt system, powered by the bat-
(2) Inspect all parts for damaged threads,
teries, is comprised of the driving lights and the.
bends, cracks, breaks and other damage. Inspect
internal emergency lights. The alternating current
for a defective lamp and any corrosion. Replace any
system includes all shop set lights, switches, and
receptacles for 120- and 240-volts. Refer to figures
c. Installation. Install the service and blackout
1-4, 1-5, and 1-6, for the wiring diagrams.
4 - 1 2 . Service and Blackout Clearance Lights