
B-2
OPERATION
B-2
SAE-300
®
HE
ENGINE BREAK-IN
LincolnElectricselectshighquality,heavy-dutyindus-
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, wet stacking (oil or tar like sub-
stanceattheexhaustport),orexcessivesmokeisnot
normal.
Largermachineswithacapacityof350amperesand
higher, which are operated at low or no-load condi-
tionsforextendedperiodsoftimeareespeciallysus-
ceptible to the conditions described above. To
accomplish successful engine break-in, most diesel-
poweredequipmentneedsonlytoberunatareason-
ably heavy load within the rating of the welder for
some period of time during the engine’s early life.
However, if the welder is subjected to extensive light
loading, occasional moderate 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
resistive load bank. Note that any attempt to
short the output studs by connecting the welding
leadstogether,directshortingoftheoutputstuds,
orconnectingtheoutputleadstoalengthofsteel
willresultincatastrophicdamagetothegenerator
andvoidsthewarranty.
2.Settheweldercontrolsforanoutputcurrentand
voltage within the welder rating and duty cycle.
Notethatanyattempttoexceedthewelderrating
or duty cycle for any period of time will result in
catastrophic damage to the generator and voids
thewarranty.
3.Periodically shut off the engine and check the
crankcaseoillevel.
WELDER OPERATION
DUTY CYCLE
The NEMA output rating of the SAE-300
®
HE is 300
amperesat32arcvoltsona60%dutycycle(consult
Specifications in this manual for alternate ratings).
Dutycycleisbasedonatenminuteperiod;thus,the
welder can be loaded at rated output for six minutes
outofeverytenminuteperiod.
CURRENT CONTROL
Do not adjust the “Current Control” while welding
because this can damage the control.
------------------------------------------------------------------------
The “Coarse Current Control” is the main Current
Adjusterandtogetherwiththe“FineCurrentControl”
adjuststhecurrentfromminimumtomaximum.Open
circuit voltage is also controlled by the “Fine Current
Control”permittingcontrolofthearccharacteristics.
A high open circuit voltage setting provides the soft
“buttering” arc with best resistance to pop-outs pre-
ferredformostwelding.Togetthischaracteristic,set
the“CoarseCurrentControl”tothelowestsettingthat
still provides the current you need and set the “Fine
CurrentControl”nearmaximum.
When a forceful “digging” arc is required, usually for
vertical and overhead welding, use a higher “Coarse
Current Control” setting and lower open circuit volt-
age.
Some arc instability may be experienced with EXX10
electrodes when trying to operate with long arc tech-
niquesatsettingsatthelowerendoftheopencircuitvolt-
agerange.
ELECTRIC SHOCK can kill.
• Do not touch electrically live parts or
electrode with skin or wet clothing.
• Insulate yourself from work and ground.
------------------------------------------------------------------------
FUMES & GASES can be dangerous.
• Keep your head out of the fumes.
• Use ventilation or exhaust to remove
fumes from breathing zone.
------------------------------------------------------------------------
WELDING SPARKS can cause fire or
explosion.
• Keep flammable material away.
------------------------------------------------------------------------
ARC RAYS can burn.
• Wear eye, ear, and body protection.
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-
WARNING
CAUTION
Содержание SAE-300 HE
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