Hobart Welding Products 140 Maintenance & Troubleshooting, Routine Maintenance, Disconnect power

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.A complete Parts List is available at www.HobartWelders.com

SECTION 7 − MAINTENANCE & TROUBLESHOOTING

7-1. Routine Maintenance

 

 

 

 

 

 

 

 

Y Disconnect power

. Maintain more often

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

before maintaining.

during severe conditions.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

n = Check

Z = Change

~ = Clean

l = Replace

 

* To be done by Factory Authorized Service Agent

 

Every

 

 

 

 

3

 

 

 

 

Months

 

 

 

 

 

l Damaged Or Unreadable l Repair Or Replace

~ Clean And Tighten Weld

 

Labels

Cracked Weld Cable

Terminals

Every

OR

 

 

 

6

 

 

 

 

 

 

 

Months

 

 

 

 

~Inside Unit

Reference

7-2. Overload Protection

1

7-3. Drive Motor Protection

1 Supplementary Protector CB1

CB1 protects unit from overload. If CB1 opens, unit shuts down.

Reset supplementary protector.

802 441

Drive motor protection circuit protects drive motor from overload. If drive motor becomes inoperative, release gun trigger and wait until protection circuit resets allowing drive motor to feed wire again.

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Contents Processes OM-925Description From Hobart to You Table of Contents − MIG Welding Gmaw Guidelines − ACCESSORIES/CONSUMABLESTypical MIG Process Connections Symbol Usage Marks a special safety messageArc Welding Hazards Electric Shock can killARC Rays can burn eyes and skin Welding can cause fire or explosionFlying Metal can injure eyes Buildup of GAS can injure or killCalifornia Proposition 65 Warnings EMF Information Principal Safety StandardsAbout Pacemakers LES Fumées ET LES GAZ peuvent être dangereux UNE Décharge Électrique peut entraîner la mortIndique un message de sécurité particulier LE Soudage peut provoquer un incendie ou une explosion DES Particules Volantes peuvent blesser les yeuxDES Pièces Chaudes peuvent provoquer des brûlures graves LE Bruit peut endommager l’ouïeRisque D’INCENDIE OU D’EXPLO LA Chute DE L’APPAREIL peut blesser’EMPLOI Excessif peut SUR DES Organes Mobiles peuvent provoquer des blessuresBoulevard, Rexdale, Ontario, Canada M9W 1R3 téléphone En ce qui concerne les stimulateurs cardiaques− Specifications Symbols And DefinitionsSpecifications − DefinitionsWarranty Duty Cycle And OverheatingOutput Duty Cycle % Exceeding duty cycle canVolt-Ampere Curves Voltage15.0 10.0 100 110 120 130 140 150 160− Installation Installing Welding GunInstalling Work Clamp Drive assembly. Tighten thumbscrewProcess/Polarity Table Changing PolarityInstalling Gas Supply CO2 gas regulator/flowmeterSelecting a Location And Connecting Input Power Do not move or operate unit Where it could tipInstalling Wire Spool And Adjusting Hub Tension Align locking hole in spool with locking pin on spool hubTurn off welding power source Installing Contact Tip And NozzleUse with solid or flux cored wire Threading Welding Wire Lay gun cable out straightPressure Indicator Scale Tighten− Operation Source or -2. Do not switch under loadControls Material Thickness Reference Chart Weld Parameter Chart 217 618-A − Maintenance & Troubleshooting Routine MaintenanceDisconnect power Overload Protection Drive Motor ProtectionChanging Drive Roll Or Wire Inlet Guide Turn Off power before replacing contact tipReplacing Gun Contact Tip Tools Needed 030/.035 GrooveDisconnect gun from unit Cleaning Or Replacing Gun LinerTo Reassemble Gun Remove handle locking nut Secure head tube in vice Replacing Switch And/Or Head TubeSlide handle Troubleshooting Table Trouble Remedy− Electrical Diagram Circuit Diagram− MIG Welding Gmaw Guidelines Typical MIG Process ConnectionsTypical MIG Process Control Settings Wire Size Amperage RangeThickness to Amperage a Select VoltageHolding And Positioning Welding Gun Conditions That Affect Weld Bead Shape PushPerpendicular Drag Short Normal LongGood Weld Bead Characteristics Poor Weld Bead CharacteristicsGun Movement During Welding Troubleshooting − Excessive Spatter Troubleshooting − PorosityTroubleshooting − Excessive Penetration Possible Causes Corrective ActionsTroubleshooting − Incomplete Fusion Troubleshooting − Lack Of PenetrationTroubleshooting − Burn-Through Troubleshooting − Distortion Troubleshooting − Waviness Of BeadWeld bead Common MIG Shielding Gases Troubleshooting Guide For Semiautomatic Welding EquipmentApplication Welding arc not stable Wire slipping in drive rolls Readjust welding parametersWelding power source Drive rolls if necessary− ACCESSORIES/CONSUMABLES AccessoriesReplacement Drive Rolls ConsumablesWork like a Pro Start Your Professional Support ServiceAssistance Contact your Distributor for Hobart Welding Products
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