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5. MAINTENANCE
▲
DANGER: Risk of injury due to unexpected start-up.
Switch off the power supply and close off the gas supply, when connecting or disconnecting torch
‰
Switch off the power supply when changing consumable parts
‰
5.1.
GENERAL MAINTENANCE
5.1.1.
CLEANING
5.1.1.1.
Remove the nozzle from the front of the neck.
5.1.1.2. Remove all spatter from the head, gas diffuser and the nozzle. These components must be clean and free of all debris to ensure
efficient gas flow and to prevent short circuit.
5.1.1.3.
Check all front end consumables for damage and wear. Replace with new genuine parts if necessary.
5.1.1.4.
To maintain the best performance repeatedly check and clean the front end tip and shield periodically. Also use an anti-spatter
spray on the tip and shield to reduce the build up of debris.
5.1.2.
LINER REPLACEMENT (STEEL LINER)
WARNING: Risk of injury such as piercing or puncture caused by electrode tip, wear protective gloves and glasses
‰
5.1.2.1. Switch off the power source and disconnect the torch from the power source (remove the wire from inside the torch buy winding
back inside the machine.)
5.1.2.2.
Lay down the hose assembly straight and remove gas nozzle, contact tip and tip adaptor from torch neck.
5.1.2.3.
Unscrew liner retention nut from central plug and pull the liner out of the torch.
5.1.2.4. Fit the new liner using a push and twist action until the liner is fully inserted. Refit the liner retention nut.
5.1.2.5. Cut off the excess length of the spiral wire liner flush with the torch neck or the tip adaptor.
5.1.2.6. Refit the torch to the machine
NOTE: Ensure the cut end of the liner does not protrude into the hole where the wire passes. it is recommended to grind the front
of
the liner to 40 Deg and deburr.
5.1.2.7. Screw down liner retention nut by hand and cut off the excess length of the spiral wire liner flush with torch neck or tip adaptor.
5.1.2.8.
Unscrew liner retention nut and pull out spiral wire liner.
5.1.2.9.
Sharpen the spiral wire liner at the front to an angle of approx. 40° and deburr.
6. TROUBLESHOOTING
1. Wire feed unit operates but no gas
flow:
Gas cylinder empty
Gas regulator closed
Faulty solenoid
Restriction in torch cables
2. Bird nesting
Contact tip overheating/Burnback
Incorrect contact tip size
Incorrect or blocked liner
Restriction in torch cable
Excessive cable kinkage
Excessive feed roll pressure
Misaligned drive rolls or wire guides
© Jack Sealey Limited
3. Burnback
Improper voltage setting
Contact tip overheating
Incorrect or blocked liner
Excessive cable kinking
Erratic wire feed
Improper stick out
4 Erratic Wire Feeding or Arc
Adjust welding voltage
Improper drive roll tension
Improper drive roll size
Worn drive rolls
Incorrect or blocked liner
Incorrect wire guide size
Misaligned drive rolls or wire guide
Gaps at liner or wire guide junctions
Incorrect contact tip size
Contact Tip overheating
Spatter adhesion on exit geometry of
tip bore
Excessive cable kinkage
Poor earth or cable connections
Weld joint area dirty
Original Language Version
MIG/T15.V2, MIG/T25.V2 Issue 1 31/10/22
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