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Thank You for Choosing Bernard

Thank you for selecting a Bernard product. Before installing, compare the equipment received against the invoice to verify that the 
shipment is complete and undamaged. It is the responsibility of the purchaser to file all claims of damage or loss that may have 
occurred during transit with the carrier.

 

The owner’s manual contains general information, instructions and maintenance to help better maintain your MIG gun or peripheral. 
Please read, understand and follow all safety precautions.

 

While every precaution has been taken to assure the accuracy of this owner’s manual, Bernard assumes no responsibility for errors or 
omissions. Bernard assumes no liability for damages resulting from the use of information contained herein. The information presented 
in this owner’s manual is accurate to the best of our knowledge at the time of printing. Please reference Tregaskiss.com for updated 
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 email at [email protected]. Our trained Customer Service 
Team is available between 8:00 a.m. and 5:30 p.m. EST, and will answer your product application or repair questions.

 

Bernard manufactures premium semi-automatic (GMAW) and FCAW (flux-cored) welding guns, consumables, accessories and manual 
arc products. For more information on other Bernard products, contact your local Bernard distributor or visit us on the web at 
Tregaskiss.com.

Subject to Change

– The information presented in this manual is accurate to the best of our knowledge at the time of

printing. Please visit Tregaskiss.com for the most up-to-date information.

Additional Material

  – For additional support materials such as spec sheets, troubleshooting information, how-to

guides and videos, animations, online configurators and much more, please visit Tregaskiss.com.

Scan this QR Code with your smart phone for immediate access to Tregaskiss.com/TechnicalSupport

Summary of Contents for T-Gun 445-45

Page 1: ...Cooled MIG GMAW Welding Gun Tregaskiss com TechnicalSupport 1 855 MIGWELD 644 9353 US Canada 1 519 737 3000 International February 2022 TG408 1 2 Bernard T Gun 400 amp Semi Automatic Water Cooled MIG...

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: ...ON 8 TECHNICAL DATA 21 8 1 Neck Dimensions 21 SECTION 9 PARTS LIST 22 9 1 400 amp Model 22 SECTION 10 TROUBLESHOOTING 23 10 1 Troubleshooting Table 23 NOTES 25 ADDITIONAL SUPPORT MATERIALS 26 iv TG408...

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: ...N 5 SPECIFICATIONS 5 1 Specifications T Gun 400 amp Semi Automatic Water Cooled MIG GMAW Welding Gun 400 amp gun Duty Cycle Rating 100 400 amp with CO2 Shielding Gas 60 400 amp with Mixed Gases TG408...

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: ...rt 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 WARNING To prevent torch damage it is highl...

Page 18: ...18 4 Install gun to feeder as per the instructions below A Miller Tweco 4 Tweco 5 Lincoln Hobart Power Pin 1 Insert power pin to shoulder and secure 2 Insert control plug to control housing of gun 3 I...

Page 19: ...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 expo...

Page 20: ...ate handle 5 Remove switch from nest in handle 6 Remove switch from switch lead connectors with needle nose pliers 7 Push switch lead connectors firmly onto switch terminals with needle nose pliers 8...

Page 21: ...from nest in handle 7 Unthread power cable 8 Cut off water line and conduit clamp and pull hoses off barbed fittings 9 Slide on new clamps on water line and conduit 10 Thread power cable on connection...

Page 22: ...er type Using a 10 mm wrench turn thread in liner retainer counterclockwise until liner is free from the power pin 3 With gun straightened grip conduit liner with pliers and remove 4 Feed replacement...

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: ...un slide rear handle up over outer jacket 3 Attach rear power block to power cable 4 Attach gas line and water line with new clamps and crimp to power block 5 Slide rear handle to rear power block and...

Page 25: ...ON 8 TECHNICAL DATA 8 1 Neck Dimensions A B C D Neck Angle Inches mm Inches mm Inches mm 445 45 45 degree 5 63 142 95 4 02 102 16 2 50 63 50 445 60 60 degree 4 99 126 75 5 14 130 56 2 50 63 50 TG408 1...

Page 26: ...211 5 Switch assembly 211 5 8 Switch with extended lever 12 662 10 Control wire 10 ft service 662 12 Control wire 12 ft service 662 15 Control wire 15 ft service 13 412 8 Switch lead connector ITEM P...

Page 27: ...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 28: ...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 29: ...NOTES TG408 1 2 25...

Page 30: ...hnicalSupport 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 Sheet Scan to vi...

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