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PRE-OPERATION SERVICE
CAUTION
READ the engine operating and maintenance instruc- tions supplied with this machine.
WARNING
Fuel can cause fire or explosion.
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• Stop engine while fueling.
•Do not smoke when fueling.
•Do not overfill tank.
•Keep sparks and flame away from tank.
•Wipe up spilled fuel and allow fumes to clear
before starting engine.
Oil
This unit is supplied from the factory with the engine crankcase filled with a high quality SAE 10W/30 oil. This oil should be acceptable for most typical ambient temperatures. Consult the engine operation manual for specific engine manufacturer’s recommendations. Upon receipt of the welder, check the engine dipstick to be sure the oil is at the “full” mark. DO NOT overfill.
Fuel
Fill the fuel tank with the grade of fuel recommended in the Engine Operator’s manual. Make sure fuel valve on the sediment bowl is in the open position.
Cooling System
The radiator has been filled at the factory with a
Battery Charging
WARNING
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 
working 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.
The Classic III & Classic III D are each equipped with a wet charged battery. The charging current is auto- matically regulated when the battery is low (after start- ing 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.
CLASSIC III AND IIID