ARC WELDER. Inspect and service the arc welder daily or as required
WHEELS. The wheels should be inspected daily and repaired if need be. If a
major damage is discovered, the wheel should be replaced.
METERS. Inspect meter before and during operation. If a malfunction is noticed,
and if the meter is beyond repair, it should be replaced at once. Inspect and
replace, at the same time, the instrument shunt if need be.
RECEPTACLE. Inspect receptacle before and during operation. If the receptacle
is not operating properly, it should be replaced at once.
TERMINAL BOARD. Inspect terminal boards. If not functioning properly
replace with a new one.
CABLE ASSEMBLY. Check cable assembly. If damage appears, replace with a
new one immediately.
ELECTRODE HOLDER ASSEMBLY.
The electrode holder assembly shoul
inspected carefully before operating the machine. If the holder assembly is
beyond repair, it should be replaced at once.
BRUSHES. Inspect the brushes and replace them if necessary
SWITCHES. If a switch fails to operate properly, it should be replaced at once
RESISTORS. If, for any reason, a resistor is thought not to be operating pro-
perly, it should. be tested with a tester. If the resistor is not good, it should
be replaced with a new one.
RHEOSTAT. If the rheostat is not operating properly, it should be replaced
Figure 7. Daily preventive maintenance service.