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D-2
MAINTENANCE
D-2
Replace brushes when they wear within 1/4”(3.5mm)
of the pigtail. A complete set of replacement brushes
should be kept on hand. Lincoln brushes have a
curved face to fit the commutator. Have an experi-
enced maintenance person seat these brushes by
lightly stoning the commutator as the armature rotates
at full speed until contact is made across the full face
of the brushes. After stoning, blow out the dust with
low pressure air.
To seat slip ring brushes, position the brushes in
place. Then slide one end of a piece of fine sandpaper
between slip rings and brushes with the coarse side
against the brushes. With slight additional finger pres-
sure on top of the brushes, pull the sandpaper around
the circumference of the rings - in direction of rotation
only - until brushes seat properly. In addition, stone
slip ring with a fine stone. Brushes must be seated
100%.
Arcing or excessive exciter brush wear indicates a
possible misaligned shaft. Have an authorized Field
Service Shop check and realign the shaft.
IDLER MAINTENANCE
Before doing electrical work, disconnect the bat-
tery.
------------------------------------------------------------------------
When installing a new battery or using a jumper bat-
tery 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
Engine Control Unit can result from incorrect connec-
tion.
1.
Proper operation of the idler requires good
grounding of the Engine Control Unit, current
sensing printed circuit board and battery.
2.
If desired, the welder can be used without automat-
ic idling by setting the “Idler” switch to the “High”
position.
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 replace-
ment item number.
CLASSIC
®
300HE
CAUTION
Содержание CLASSIC 300 HE
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