Hobart 125 EZ, H-9B Changing Drive Roll Or Wire Inlet Guide, Slide replacement wire guide into

Page 23

6-4. Changing Drive Roll Or Wire Inlet Guide

+ −

6 5

.030/.035 VK Groove

Stamped .030/.035

Tools Needed:

5/16 in

1 Pressure Adjustment Knob

2 Pressure Assembly

Pivot pressure adjustment knob down, and lift pressure assembly up.

 

+ −

 

3

Pivot Tube Plate

 

 

 

4

Securing Screws

 

 

 

5 Pressure Arm Pivot Tube

 

2

 

6

Inlet Wire Guide

 

 

 

Remove screws and pivot tube

 

 

 

plate. Lift out pressure arm pivot

 

 

 

tube, and slide inlet wire guide out of

 

 

 

tube.

 

 

 

Slide replacement wire guide into

 

 

 

tube, and place tube back into drive

 

 

 

assembly. Be sure tip of wire guide

 

1

 

is as close to drive roll as possible

 

 

 

without touching.

 

 

 

Reinstall plate and tighten screws.

 

 

7

7

Retaining Knob

 

 

Rotate counterclockwise and

 

 

 

 

 

 

remove knob.

 

 

 

8

Drive Roll

 

 

 

The drive roll consists of two

 

 

 

different sized grooves. Each side

3

4

 

is stamped with the proper size.

 

 

 

Select the groove that matches the

 

 

 

wire size on the wire spool. Install

 

+ −

 

drive roll onto motor shaft so that

 

 

correct groove size stamp faces out

 

 

 

away from drive housing.

 

 

 

9

Retaining Knob Opening

 

 

 

Install retaining knob by placing

 

 

 

opening over drive roll (opening

 

 

 

faces rear of unit). Rotate retaining

 

 

 

knob clockwise to secure drive roll.

 

 

 

Position wire into outer groove of

 

.024 Groove

 

drive roll (see Section 4-7).

 

 

 

 

Stamped .024

8

9

804 123-A / 804 129-A

OM-923 Page 19

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Contents File Flux Cored Fcaw OM-923Processes DescriptionFrom Hobart to You Table of Contents Warranty Electric Shock can kill Symbol UsageMarks a special safety message Arc Welding HazardsBuildup of GAS can injure or kill ARC Rays can burn eyes and skinWelding can cause fire or explosion Flying Metal can injure eyesCalifornia Proposition 65 Warnings About Pacemakers Principal Safety StandardsEMF Information Indique un message de sécurité particulier UNE Décharge Électrique peut entraîner la mortLES Fumées ET LES GAZ peuvent être dangereux DES Pièces Chaudes peuvent provoquer des brûlures graves LE Soudage peut provoquer unIncendie ou une explosion DES Particules Volantes peuvent blesser les yeuxDES Organes Mobiles peuvent provoquer des blessures Risque D’INCENDIE OU D’EXPLOLA Chute DE L’APPAREIL peut blesser ’EMPLOI Excessif peut SUREn ce qui concerne les stimulateurs cardiaques Principales normes de sécuritéDuty Cycle And Overheating − SpecificationsSpecifications Volt-Ampere Curves Polarity − InstallationInstalling Work Clamp Process/Polarity TableInstalling 4 in 102 mm Wire Spool Installing Wire Spool And Adjusting Hub TensionDo not move or operate unit where it could tip Turn off welding power source Installing Contact Tip And NozzleInput Power Threading Welding WireControls − OperationOperating The Gun Drive Motor Protection − Maintenance &TROUBLESHOOTINGRoutine Maintenance Overload ProtectionSlide replacement wire guide into Changing Drive Roll Or Wire Inlet GuideReplacing Gun Contact Tip Cleaning Gun Liner Replacing Gun Liner End of wire at spool13/16 in 21 mm Does not run Troubleshooting TableTrouble Remedy Circuit Diagram − Electrical DiagramTypical Fcaw Process Connections − Wire Welding GuidelinesAmperage Typical Control SettingsWire Size Amperage Range Thickness to Amperage aHolding And Positioning Welding Gun Conditions That Affect Weld Bead Shape Gun Movement During Welding Poor Weld Bead CharacteristicsGood Weld Bead Characteristics Possible Causes Corrective Actions Troubleshooting − Excessive SpatterTroubleshooting − Porosity Troubleshooting − Excessive PenetrationTroubleshooting − Burn-Through Troubleshooting − Lack Of PenetrationTroubleshooting − Incomplete Fusion Wire does not feed Troubleshooting − Waviness Of BeadTroubleshooting − Distortion Troubleshooting Guide For Semiautomatic Welding EquipmentMain Assembly − Parts ListDia Part Description Quantity Pkg 225209 Wire Drive AssemblyPage Assistance ServiceSupport Hobart Welding Products Contact your Distributor for