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4.4.
ASSEMBLING THE EARTH CLAMP: (Refer to fig.3) Feed the eyelet on the end of the earth lead through the hole in the clamp arm as shown in
fig.3A.
4.4.1.
Drop the eyelet over the terminal and firmly fix with the bolt provided as shown in fig.3B.
4.5.
INSTALLING THE GAS CYLINDER. The welder is designed to accommodate small or medium sized gas cylinders up to a maximum
height of 1000mm. Contact your local Gas dealer for supply.
4.5.1.
Place the gas cylinder onto the rear platform of the welder. Drop one end of the fixing chain into one side of the retaining bracket.
Draw the chain around the cylinder and place it into the slot on the other side of the bracket leaving as little slack in the chain as possible.
4.6.
ATTACHING THE REGULATOR. Whichever gas you are using it is advisable to 'crack' the cylinder valve before attaching the regulator.
This means opening and closing the valve very quickly in order to blow away any dust and dirt that may have accumulated in the gas
outlet. Stand to one side whilst doing this.
4.6.1.
CO² GAS. Ensure that the threads on the gas bottle are undamaged and free of oil and grease before attaching the regulator. (Oil or grease
in the presence of high pressure gases can be explosive.) Ensure that the regulator has an undamaged gasket fitted. The regulator will
screw directly to the threads on the gas bottle. Tighten with a spanner.
4.6.2.
ARGON GAS OR ARGON MIXTURES. Cylinders containing Argon gas and Argon mixtures have a female thread and will require the use of
a Bull Nose Adaptor to attach the regulator to the cylinder as indicated in fig.4. Ensure that the threads on the gas bottle are undamaged and
free of oil and grease before attaching the regulator. (Oil or grease in the presence of high pressure gases is explosive.) Fit the Bull Nose
Adaptor to the cylinder first and tighten with a spanner. Ensure that the regulator has an undamaged gasket before fitting onto the Bull
Nose Adaptor. Tighten with a spanner.
4.6.3.
Slide a worm drive hose clip over each end of the gas hose supplied. Push one end of the hose onto the regulator outlet and the other
end over the gas inlet spigot on the back of the welder. Tighten the clips to ensure a good seal.
4.6.4.
Close the regulator valve by turning it anticlockwise before opening the cylinder valve. Stand to one side when opening the cylinder valve.
4.6.5.
Set the regulator flow rate to 5-8 litres/min depending on the material to be welded, and whether there are draughts which are strong
enough to disturb the gas flow
4.7.
CONNECT THE EARTHING CABLE TO THE WELDER. Take the dinse plug on the end of the earth clamp cable and insert it into the
earthing socket in the bottom left hand corner of the welder front cover (see fig.1E) ensuring that the spigot on the plug enters the
keyway in the socket. Fully insert the plug then turn it through 90º to lock it in place.
© Jack Sealey Limited
fig.1
fig.2
fig.5
fig.6
Original Language Version
fig.3
fig.4
MIGHTYMIG250.V2 Issue 2(F) 22/12/21
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