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Protect yourself and others from injury – read, follow, 
and save these important safety precautions and 
operating instructions.

1-1 Symbol Usage

DANGER! – Indicates a hazardous situation which, if 
not avoided, will result in death or serious injury. The 
possible hazards are shown in the adjoining symbols 

or explained in the text.

Indicates a hazardous situation which, if not avoided, 
could result in death or serious injury. The possible 
hazards are shown in the adjoining symbols or 

explained in the text.

NOTICE

 – Indicates statements not related to personal injury.

 – Indicates special instructions.

This group of symbols means Warning! Watch Out! 
ELECTRIC SHOCK, MOVING PARTS, and HOT PARTS hazards. 
Consult symbols and related instructions below for necessary 
actions to avoid the hazards.

1-2 Arc Welding Hazards

The symbols shown below are used throughout this 
manual to call attention to and identify possible hazards. 
When you see the symbol, watch out, and follow the 

related instructions to avoid the hazard. The safety information 
given below is only a summary of the more complete safety 
information found in section 1-4 Principal Safety Standards on 
page 3
, and in welding power source Owner's Manual. Read and 
follow all Safety Standards.

Only qualified persons should install, operate, maintain, 
and repair this equipment. A qualified person is defined 
as one who, by possession of a recognized degree, 

certificate, or professional standing, or who by extensive 
knowledge, training and experience, has successfully 
demonstrated ability to solve or resolve problems relating to the 
subject matter, the work, or the project and has received safety 
training to recognize and avoid the hazards involved.

During operation, keep everybody, especially children, 
away.

ELECTRIC SHOCK can kill.

 

l

Always wear dry insulating gloves.             

 

l

Insulate yourself from work and ground.             

 

l

Do not touch live electrode or electrical parts.             

 

l

Replace worn, damaged, or cracked guns or cables.             

 

l

Turn off welding power source before changing contact tip or 
gun parts.             

 

l

Keep all covers and handle securely in place.             

FUMES AND GASES can be hazardous.

 

l

Keep your head out of the fumes.             

 

l

Ventilate area, or use breathing device. The 
recommended way to determine adequate 
ventilation is to sample for the composition 
and quantity of fumes and gases to which personnel are 
exposed.             

 

l

Read and understand the Safety Data Sheets (SDSs) and the 
manufacturer’s instructions for adhesives, coatings, cleaners, 
consumables, coolants, degreasers, fluxes, and metals.             

MOVING PARTS can injure.

 

l

Keep away from moving parts.

 

l

Keep away from pinch points such as drive 
rolls.

WELDING can cause fire or explosion.

 

l

Do not weld near flammable material.             

 

l

Do not weld on containers that have held 
combustibles, or on closed containers such as 
tanks, drums, or pipes unless they are 
properly prepared according to AWS F4.1 and AWS A6.0 (see 
Safety Standards).             

 

l

Watch for fire; keep extinguisher nearby.             

 

l

Read and understand the Safety Data Sheets (SDSs) and the 
manufacturer’s instructions for adhesives, coatings, cleaners, 
consumables, coolants, degreasers, fluxes, and metals.             

BUILDUP OF GAS can injure or kill.

 

l

Shut off compressed gas supply when not in 
use.

 

l

Always ventilate confined spaces or use approved air-
supplied respirator.

ARC RAYS can burn eyes and skin.

Arc rays from the welding process produce intense 
visible and invisible (ultraviolet and infrared) rays 
that can burn eyes and skin. Sparks fly off from the 
weld.

TG008-1.2

1

SECTION 1 — SAFETY PRECAUTIONS — READ BEFORE USING

Summary of Contents for T-Gun 450

Page 1: ...ooled MIG GMAW Welding Gun Tregaskiss com TechnicalSupport 1 855 MIGWELD 644 9353 US Canada 1 519 737 3000 International February 2022 TG008 1 2 Bernard T Gun 450 600 amp Semi Automatic Water Cooled M...

Page 2: ...ted material For customer support and special applications please call the Bernard Customer Service Department at 1 855 MIGWELD 644 9353 US Canada or 1 519 737 3000 International fax 1 708 946 6726 or...

Page 3: ...RIDAD LEA ANTES DE USAR 7 3 1 Uso de s mbolos 7 3 2 Peligros en soldadura de arco 7 3 3 Advertencias de la Proposici n 65 del estado de California 9 3 4 Est ndares principales de seguridad 9 3 5 Infor...

Page 4: ...ECHNICAL DATA 21 8 1 Neck Dimensions 21 SECTION 9 PARTS LIST 22 9 1 450 amp Model 22 9 2 600 amp Model 23 SECTION 10 TROUBLESHOOTING 24 10 1 Troubleshooting Table 24 ADDITIONAL SUPPORT MATERIALS 26 iv...

Page 5: ...gnize and avoid the hazards involved During operation keep everybody especially children away ELECTRIC SHOCK can kill l Always wear dry insulating gloves l Insulate yourself from work and ground l Do...

Page 6: ...re touching l Do not touch hot metal l Protect hot metal from contact by others NOISE can damage hearing Noise from some processes or equipment can damage hearing l Check for noise level limits exceed...

Page 7: ...0 Subpart Q and Part 1926 Subpart J Website www osha gov SR7 2022 01 1 5 EMF Information Electric current flowing through any conductor causes localized electric and magnetic fields EMF The current fr...

Page 8: ...r une connaissance une formation et une exp rience approfondies a d montr avec succ s sa capacit r soudre les probl mes li s la t che le travail ou le projet et a re u une formation en s curit afin de...

Page 9: ...une protection corporelle en cuir ou des v tements ignifu ges FRC La protection du corps comporte des v tements sans huile comme des gants de cuir une chemise solide des panta lons sans revers des ch...

Page 10: ...relatives aux CEM Le courant lectrique qui traverse tout conducteur g n re des champs lectromagn tiques CEM certains endroits Le courant issu d un soudage l arc et de proc d s connexes y compris le s...

Page 11: ...tema en cuesti n adem s de haber asistido a una capacitaci n en seguridad para reconocer y evitar los peligros que implica el proceso Durante su operaci n mantenga lejos a todos especialmente a los n...

Page 12: ...in vuelta calzado alto y una gorra PARTES CALIENTES puedan causar quemaduras severas l Permita que la antorcha se enfr e antes de tocarla l No toque metal caliente l Proteja a otros del contacto con e...

Page 13: ...genera campos el ctricos y magn ticos EMF localizados La corriente del arco de soldadura y otras t cnicas afines como la soldadura por puntos el ranurado el corte por plasma y el calentamiento por in...

Page 14: ...all pay Tregaskiss for all warranty claim costs incurred by Tregaskiss including inspection labor parts testing scrap and freight due to warranty claims submitted by Purchaser which are not covered by...

Page 15: ...00 amp Semi Automatic Water Cooled MIG GMAW Welding Guns 450 amp gun Duty Cycle Rating 100 450 amp with CO2 Shielding Gas 60 450 amp with Mixed Gases 600 amp gun Duty Cycle Rating 100 600 amp with CO2...

Page 16: ...or into quick connect block and tighten 4 Position assembly into feeder adaptor and trim liner within 1 16 1 6 mm of the drive rolls and remove burrs if necessary 5 Secure assembly into feeder 6 Threa...

Page 17: ...Insert control plug into feeder 6 Securely clamp blue hose on rear housing to water out on water cooler and red hose on rear housing to water in on water cooler 7 Recheck a proper gas flow b drive ro...

Page 18: ...e rear handle block 2 Tighten the power pin into the rear block using a 1 1 4 wrench on the rear block and a 5 8 wrench on the power pin 3 Install liner See section 7 4 Changing the Liner on page 18 4...

Page 19: ...ting of contact tip l To prevent scoring on heavy duty retaining heads do not use pliers A Removal and Replacement 1 Pull slip on nozzles off with a clockwise twisting motion 2 When insulating nozzle...

Page 20: ...h terminals with needle nose pliers 5 Depress switch plunger and nest back into housing 6 Fit switch housing into nest on handle switch leads must lie parallel 7 Align housing holes with threaded hole...

Page 21: ...wer cable 5 Cut off water line and conduit cut off clamps and pull hoses off barbed fittings 6 Slide clamps on water line and conduit 7 Thread power cable on and tighten 8 Push water line and conduit...

Page 22: ...er counterclockwise until liner is free from the power pin 3 With gun straightened grip conduit liner with pliers and remove 4 Feed replacement liner through gun using short strokes to avoid kinking T...

Page 23: ...as white line 6 Pull gas and water line off of power block At this point rear power block will be removed from gun 7 Slide rear handle off gun 8 On front of gun release front handle from neck 9 Remove...

Page 24: ...ure See section 7 2 Changing the Switch on page 16 15 At rear of gun slide rear handle up over outer jacket 16 Attach rear power block to power cable 17 Attach gas line and water line with new clamps...

Page 25: ...00 76 00 1 48 38 00 455 60 60 degree 5 73 145 00 5 27 134 00 3 00 76 00 1 48 38 00 455 180 180 degree 7 45 189 00 0 00 0 00 3 00 76 00 1 48 38 00 595 45 45 degree 7 05 179 00 4 86 123 00 3 00 76 00 1...

Page 26: ...able assembly 15 ft service actual length 14 5 ft 10 610 Handle front includes mounting screws 610 Handle rear 11 411 1 Switch 411 2 Switch housing includes mounting screws 411 3M Mounting screw 411 4...

Page 27: ...Power cable assembly 15 ft service actual length 14 5 ft 9 610 Handle front includes mounting screws 610 Handle rear 10 411 1 Switch 411 2 Switch housing includes mounting screws 411 3M Mounting scre...

Page 28: ...Contact tip size 2 Electrode eroding contact tip 3 Exceeding duty cycle 1 Replace with proper size 2 Inspect and or change drive rolls 3 Replace with properly rated Bernard MIG Gun 5 Erratic arc 1 Wor...

Page 29: ...ose or poor power connection 1 a Replace with properly rated Bernard MIG Gun b Decrease parameters to within gun rating 2 a Clean tighten or replace cable grounding connection b Tighten gun and cable...

Page 30: ...nicalSupport Scan to view the T Gun Semi Automatic Water Cooled MIG Gun Owner s Manual Scan to view the TOUGH LOCK Consumables Spec Sheet Scan to view the AccuLock R Consumables Spec Sheetl Scan to vi...

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