Lincoln Electric PERKINS 350-SA - Manual (Page 18)

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Idler Maintenance
Before doing electrical work on the idler printed
circuit board, disconnect the battery.
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1. The solenoid plunger must work freely because
binding can cause engine surging. If surging
occurs, be sure the plunger is properly lined up
with the throttle lever. Dust the plunger about once
a year with graphite powder.
2. When any service is done, reassemble the rubber
bellows on the solenoid plunger with the vent hole
on the lower side.
3. Proper operation of the idler requires good
grounding of the printed circuit board (through its
mounting), reed switch and battery.
4. If desired, the welder can be used without
automatic idling by setting the “Idler Control” switch
to the “High Idle” position.
5. When installing a new battery or using a jumper
battery to start the engine, be sure the battery
polarity is connected properly. The correct polarity
is negative ground. Damage to the engine
alternator and the printed circuit board can result
from incorrect connection.
Nameplates
Whenever routine maintenance is performed on this
machine, or at least yearly, inspect all nameplates and
labels for legibility. Replace those which are no
longer clear. Refer to the parts list for the
replacement item number.
TROUBLESHOOTING
Have qualified personnel do the troubleshooting
work. Turn the engine off before working inside
the machine. In some cases, it may be
necessary to remove safety guards to perform
required maintenance. Remove guards only
when necessary and replace them when the
maintenance requiring their removal is
complete. Always use the greatest care when
working near moving parts.
Do not put your hands near the engine cooling
blower fan. If a problem cannot be corrected by
following the instructions, take the machine to
the nearest Lincoln Field Service Shop.
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CAUTION WARNING
ELECTRIC SHOCK can kill.
• Do not touch electrically live parts or
electrode with skin or wet clothing.
• Insulate yourself from work and
ground
• Always wear dry insulating gloves.
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ENGINE EXHAUST can kill.
• Use in open, well ventilated areas or
vent exhaust outside.
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MOVING PARTS can injure.
• Do not operate with doors open or
guards off.
• Stop engine before servicing.
• Keep away from moving parts.
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See additional warning information at
front of this operator’s manual
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