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INSTALLATION
A1.6 A1.6
CLASSIC® 300D & 300G
ENGINE BREAK-IN
Lincoln Electric selects high quality, heavy-duty indus-
trial engines for the portable welding machines we
offer. While it is normal to see a small amount of
crankcase oil consumption during initial operation,
excessive oil use, wetstacking (oil or tar like substance
at the exhaust port), or excessive smoke is not normal.
Larger machines with a capacity of 350 amperes and
higher, which are operated at low or no-load conditions
for extended periods of time are especially susceptible
to the conditions described above. To accomplish suc-
cessful engine break-in, most diesel-powered equip-
ment needs only to be run at a reasonably heavy load
within the rating of the welder for some period of time
during the engineʼs early life. However, if the welder is
subjected to extensive light loading, occasional moder-
ate to heavy loading of the engine may sometimes be
necessary. Caution must be observed in correctly
loading a diesel/generator unit.
1. Connect the welder output studs to a suitable resis-
tive load bank. Note that any attempt to short the
output studs by connecting the welding leads
together, direct shorting of the output studs, or con-
necting the output leads to a length of steel will
result in catastrophic damage to the generator and
voids the warranty.
2. Set the welder controls for an output current and
voltage within the welder rating and duty cycle.
Note that any attempt to exceed the welder rating or
duty cycle for any period of time will result in cata-
strophic damage to the generator and voids the
warranty.
3. Periodically shut off the engine and check the
crankcase oil level.
Battery Charging
The Classic® 300 D is equipped with a wet charged
battery. The charging current is automatically regulat-
ed when the battery is low (after starting the engine) to
a trickle current when the battery is fully charged.
When replacing, jumping or otherwise connecting the
battery to the battery cables, the proper polarity must
be observed. This system is NEGATIVE GROUND.
GASES FROM BATTERY can explode.
• Keep sparks, flame and cigarettes
away.
BATTERY ACID can burn eyes and
skin.
• Wear gloves and eye protection and be
careful when boosting, charging or work-
ing near battery.
To prevent EXPLOSION when:
a) Installing a new battery - disconnect the
negative cable from the old battery first and
connect the negative cable to the new battery
last.
b) Connecting a battery charger - remove the
battery from the welder by disconnecting the
negative cable first, then the positive cable and
battery clamp. When reinstalling, connect the
negative cable last.
c) Using a booster - connect the positive lead to
the battery first, then connect the negative lead to
the ground lead on the base.
To prevent ELECTRICAL DAMAGE when:
a) Installing a new battery.
b) Using a booster.
Use correct polarity - Negative Ground.
To prevent BATTERY DISCHARGE, if you have an
ignition switch, turn it off when engine is not
running.
• To prevent BATTERY BUCKLING, tighten nuts on
battery clamp until snug.
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WARNING
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