Lincoln Electric IM663 RED-D-ARC D300K 3+3 - Manual (Page 16)

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.
D-1 MAINTENANCE D-1
D300K 3+3
SAFETY PRECAUTIONS
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.
-----------------------------------------------------------------------
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.
------------------------------------------------------------------------
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 operatorʼs manual and
the Engine manual as well.
-----------------------------------------------------------
WARNING
4. When necessary, remove the sediment bowl, if so equipped,
from beneath the fuel tank and clean out any accumulated
dirt and water.
5. Follow the engine service schedule in this manual and the
detailed maintenance and troubleshooting in the engine
manufacturerʼs manual.
Cooling System
The D300K 3+3 is equipped with a pressure radiator. Keep the
radiator cap tight to prevent loss of coolant. Clean and flush the
cooling system periodically to prevent clogging the passage
and overheating the engine. When antifreeze is needed, always
use the permanent type. Code 10567 Capacity = 1.2 qts (4.5
Ltrs.). Codes 10956, 11214, 11488, 11549 Capacity = 9.5 qts
(9.0 Ltrs.).
Bearings
This welder is equipped with a double-shielded ball bearing
having sufficient grease to last indefinitely under normal ser-
vice. Where the welder is used constantly or in excessively dirty
locations, it may be necessary to add one half ounce of grease
per year. A pad of grease one inch wide, one inch long, and
one inch high weighs approximately one half ounce. Over-
greasing is far worse than insufficient greasing.
When greasing the bearings, keep all dirt out of the area. Wipe
the fittings completely clean and use clean equipment. More
bearing failures are caused by dirt introduced during greasing
than from insufficient grease.
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 rotating armature when stoning the
commutator.
------------------------------------------------------------------------------------
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.
WARNING