Maintenance; Safety Precautions; General Instructions; Cooling System - Lincoln Electric Red-D-Arc Welderentals D300K 3+3 SE Operator's Manual

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SAFETY PRECAuTIONS

WARNING
have qualified personnel do the maintenance
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 any rotating parts. If
a problem cannot be corrected by following the
instructions, take the machine to the nearest
Red-D-Arc location.
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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.
------------------------------------------------------------------------
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 enclosure or
guards off.
• Stop engine before servicing.
• Keep away from moving parts.
------------------------------------------------------------------------
See additional warning information
throughout this operator's manual and
the Engine manual as well.
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General Instructions

1. Blow out the welder and controls with an air hose
at least once every two months. In particularly
dirty locations, this cleaning may be necessary
once a week. Use low pressure air to avoid driving
dirt into the insulation.
2. "Current Range Selector" contacts should not be
greased. To keep the contacts clean, rotate the
current control through its entire range frequently.
Good practice is to turn the handle from maximum
to minimum setting twice each morning before
starting to weld.
3. Put a drop of oil on the "Current Range Selector"
shaft at least once every month.

MAINTENANCE

4.
Follow the engine service schedule in this manual
and the detailed maintenance and troubleshooting
in the engine manufacturer's manual.

Cooling System

The D300K 3+3 SE is equipped with a pressure radia-
tor. Keep the radiator cap tight to prevent loss of
coolant. Clean and flush the cooling system periodi-
cally to prevent clogging the passage and overheating
the engine. When antifreeze is needed, always use
the permanent type.

bearings

This welder is equipped with a double-shielded ball
bearing having sufficient grease to last indefinitely
under normal service.

Commutator and brushes

uncovered rotating equipment can be dangerous.
use care so your hands, hair, clothing or tools do
not catch in the rotating parts. Protect yourself
from particles that may be thrown out by the rotat-
ing armature when stoning the commutator.
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Shifting of the commutator brushes may result in:
- Change in machine output
- Commutator damage
- Excessive brush wear
Periodically inspect the commutator, slip rings, and
brushes by removing the covers. DO NOT remove or
replace these covers while the machine is running.
Commutators and slip rings require little attention.
However, if they are black or appear uneven, have
them cleaned by an experienced maintenance man
using fine sandpaper or a commutator stone. Never
use emery cloth or paper for this purpose.
Replace brushes when they wear within 1/4" of the
pigtail. A complete set of replacement brushes should
be kept on hand.
D300K 3+3 SE
WARNING
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