Maintenance | Lincoln Electric 550, 350 instruction

D-4	MAINTENANCE	D-4

6.Remove the two trigger terminals from the modular trigger terminal housing.

7.Remove the incoming connector assembly (see Item 8 Figure A.4, Installation Section) from the gun cable.

8.Remove the damaged gun cable by sliding it rear- ward from the vacuum hose.

9.Install the new gun cable by sliding it forward through the vacuum hose.

10.Reassemble gun by reversing steps 1 through 7, noting the following:

•Route trigger leads per this section Trigger and Accessory Switch Lead Routings (see figure D.1).

•Installation torques for both the incoming connector and gun tube assemblies: 10 to 12 ft.-lbs..

•The order of connection of the trigger termi- nals (red and white leads) to the trigger assembly or in the Y connector is unimpor- tant (non-polarized connections).

•Reassemble the Y connector by reversing steps shown in 5.

•Install a new liner if it does not meet the cut dimensional range given per this section Liner Assembly Cleaning or Replacement.

MAGNUM™ PRO 350 and 550 FUME GUNS

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Lincoln Electric 550, 350 manual Maintenance

Contents

IM990 California Proposition 65 Warnings Safety Electric Shock can kill Iii Welding and Cutting Sparks can Cause fire or explosion Sûreté Pour Soudage a LʼArc Précautions DE Sûreté Thank You Table of Contents Installation Technical Specifications Magnum PRO Fume GunsMagnum PRO 350 and 550 Fume Guns Unpacking the Fume GUN Feeder END Figure A.2, Items 1 thruFeeder END Figure A.4, Items 1 thru Compatibility of Welding Machines and Wire Feeders Safety PrecautionsPrepare the Welding Machine and Wire Feeder as follows Preparing the Fume GUN for Welding Kit No. for Gun Model Select and Install a Wire Feeder Connection K KIT Select and Install GUN Consumable Parts Wire Diameter 350 amp 550 ampKP Nos. for Gun Model Connect the GUN to the Wire Feeder Removing the Fume Tube Assembly See figure A.7Connect the GUN to the Fume Collection System Product Description Operation Trigger Position See Figure B.1 Selecting or Changing Welding Also See Installation Section Load Specified Wire Into the GUNPrepare the Fume GUN for Make the Weld Accessories or Options Accessories Routine Cleaning Inspections MaintenanceGAS Diffuser Replacement Liner Assembly Cleaning or Replacement Gun Handle, See Figure D.1 Trigger and Accessory Switch Lead Routings Trigger Assembly Replacement GUN Tube ReplacementGUN Cable Assembly Replacement Assembly Cleaning or Replacement Maintenance HOW to USE Troubleshooting Guide Troubleshooting Problems Path Unkinked wire emerges Poor fume extraction Possible Areas Recommended Symptoms Possible Recommended Symptoms Cause Course of Action Magnum PRO 350 and 550 Fume Guns Magnum PRO 350 and 550 Fume Guns Precaucion Aviso DE