Lincoln Electric IDEALARC R3R 375-I - Manual (Page 12)

D-1 MAINTENANCE D-1
ELECTRIC SHOCK can kill.
• Have an electrician install and ser-
vice this equipment.
• Turn the input power off at the fuse
box before working on equipment.
• Do not touch electrically hot parts.
ROUTINE MAINTENANCE
1. The fan motor has sealed bearings which require no
service.
2. In extremely dusty locations, dirt may clog the air
channels causing the welder to run hot. Blow out
the machine at regular intervals.
POCKET AMPTROL
Routine cleaning should be the only maintenance
required. The probe tip should be kept in condition to
provide sharp edges at the ends to assure penetration
of heavy oxide coatings on the work piece. A blunted
tip could result in giving different welding currents for a
given dial setting.
POWER RECTIFIER REPLACEMENT
Refer to the troubleshooting section “Power Rectifier
Bridge Assembly Checking Procedure” if a rectifier fail-
ure is suspected
NOTE: Since proper material and correct assembly
procedures are critical, field disassembly of the power
rectifier bridge sections can do more harm than good.
Return a defective rectifier bridge section (or the entire
bridge) to the factory for repairs.
IDEALARC® R3R 375-I, 500-I AND 600-I
WARNING