AUTO ARC 255 Spécifications

Auto Arc 255And M-25 GunProcessesDescriptionRMIG (GMAW) WeldingFlux Cored (FCAW) WeldingArc Welding Power Source AndWire FeederOM-157 066VNovember 200

OM-157 066 Page 66 Minutes Welding 4 Minutes Resting2-3. Welding Power Source Duty Cycle And OverheatingDuty Cycle is percentage of 10minutes that uni

OM-157 066 Page 72-5. Installing Work Clamp1 Work Cable2 BootSlide boot onto work cable. Routecable out front panel opening frominside.3 Negative (–)

OM-157 066 Page 82-7. Installing Welding GunRef. ST-800 921-C1 Drive Assembly2 Gun Securing Knob3 Gun EndLoosen securing knob. Insert gunend through o

OM-157 066 Page 92-9. Setting Gun Polarity1 Polarity Changeover LabelAlways read and follow manufac-ture’s recommended polarity.3/4, 11/16 inTools Nee

OM-157 066 Page 102-11. Electrical Service GuideInput Voltage 200 230 460 575Input Amperes At Rated Output 46 40 20 16Max Recommended Standard Fuse Or

OM-157 066 Page 112-13. Threading Welding Wire1 Wire Spool2 Welding Wire3 Inlet Wire Guide4 Pressure Adjustment Knob5 Drive Roll6 Outlet Wire Guide7 G

OM-157 066 Page 12SECTION 3 – OPERATION3-1. Front Panel ControlsRef. ST-171 639-C / Ref. ST-174 843-AControls For Standard Units1 Wire Speed ControlTh

OM-157 066 Page 133-2. Center Baffle ControlsRef. ST-800 919-B / S-171 6011 Wire Mode SwitchFor better control of wire speed usethe Low position when

OM-157 066 Page 143-3. Weld Parameter Chart

OM-157 066 Page 15Ref. 200 062

OM-157 066 Page 16SECTION 4 – MAINTENANCE & TROUBLESHOOTING4-1. Routine MaintenanceY Disconnect power before maintaining.. Maintain more oftenduri

OM-157 066 Page 174-3. Fuses F1 And F2Ref. ST-800 928-BY Turn Off unit, and disconnectinput power.1 Fuse F1 (See Parts List ForRating)F1 protects the

OM-157 066 Page 184-6. Cleaning Or Replacing Gun LinerRef. ST-800 797-C3/8 inTo Reassemble Gun:Insert new liner.Install and tighten wire outlet guide.

OM-157 066 Page 194-7. Replacing Switch And/Or Head TubeRef. ST-800 795-C1 Remove handlelocking nut.2 Remove switch housing. Note: If installing newsw

OM-157 066 Page 204-8. TroubleshootingWelding Trouble RemedyNo weld output; wire does not feed. Secure power cord plug in receptacle (see Section 2-12

OM-157 066 Page 21SECTION 5 – ELECTRICAL DIAGRAMSB-173 544-EFigure 5-1. Circuit Diagram For Welding Power Source

OM-157 066 Page 22Notes

OM-157 066 Page 23SECTION 6 – PARTS LIST1Figure 6-2 – 235689101112131416151718Figure 6-6 - 20ST-800 930-D. Hardware is common andnot available unless

OM-157 066 Page 24DescriptionPartNo.Dia.Mkgs.ItemNo.Figure 6-1. Main AssemblyQuantity8 146 165 PANEL, side LH 1. . . . . . . . . . . . . . . . . . .

OM-157 066 Page 25ST-800 931-D. Hardware is common andnot available unless listed.1234567891011121314151618172021222325262728 (Fig. 6–3)2930312419Figu

The following terms areused interchangeablythroughout this manual:MIG = GMAWTABLE OF CONTENTSSECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING 1. . .

OM-157 066 Page 26DescriptionPartNo.Dia.Mkgs.ItemNo.Figure 6-2. Baffle, Center w/Components (Fig 6-1 Item 2)Quantity1 058 427 RING, retaining spool 1.

OM-157 066 Page 27See Table 6-1Drive Roll & Wire Guide Kits.148 529-H. Hardware is common andnot available unless listed.Figure 6-3. Wire Drive An

OM-157 066 Page 28DescriptionDia.Mkgs.ItemNo.Figure 6-3. Wire Drive And Gears (Fig 6-2 Item 28)QuantityPartNo.1 602 009 SCREW, .250-20 x 1.25 soc hd g

OM-157 066 Page 29ST-802 288. Hardware is common andnot available unless listed.123678910111213141516171854Figure 6-4. Panel, Rear w/ComponentsDescrip

OM-157 066 Page 30ST-802 287. Hardware is common andnot available unless listed.124567891011121314153Figure 6-5. Panel, Front w/ComponentsDescriptionP

OM-157 066 Page 31Ref. 800 792-B1 23456789101417111211121391516Figure 6-6. Exploded View Of Gun

OM-157 066 Page 32QuantityDescriptionPartNo.ItemNo.Figure 6-6. Exploded View Of Gun (Fig 1 Item 20)1 200 258 NOZZLE, slip type .500 orf flush 1. . .

Notes

Notes

Effective January 1, 2000(Equipment with a serial number preface of “LA” or newer)This limited warranty supersedes all previous manufacturerswarrantie

PRINTED IN USA 1/00Model Name Serial/Style NumberPurchase Date (Date which equipment was delivered to original customer.)DistributorAddressCityState Z

OM-157 066 Page 1SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USINGsom _nd_4/981-1. Symbol UsageMeans Warning! Watch Out! There are possible hazardswi

OM-157 066 Page 2Arc rays from the welding process produce intensevisible and invisible (ultraviolet and infrared) raysthat can burn eyes and skin. Sp

OM-157 066 Page 31-3. Additional Symbols For Installation, Operation, And MaintenanceFIRE OR EXPLOSION hazard.D Do not install or place unit on, over,

OM-157 066 Page 41-5. EMF InformationConsiderations About Welding And The Effects Of Low FrequencyElectric And Magnetic FieldsWelding current, as it f

OM-157 066 Page 5SECTION 2 – INSTALLATION2-1. SpecificationsRated Welding Amperage Range Maximum Open-Amperes Input at Rated LoadOutput, 50 or 60 Hz,