Lincoln 225 a.c. To miller 250d h.f. - Lincoln Precision Tig 225 Ready Pak With Cart K2535 2

I had a problem like this a few days ago try taken of the air filter to were u can see the choke it may not be opening rite just cause it opens don't mean itsnot opening rite get a small spray bottle put gas in it and as u start ur welder spray the choke with with the gas a lil if it starts turn ur switch to run for while it workd for me if that don't maybe change the spark plugs

Is the amperage adjust crank or the HF switch not working?
To repair the amperage crank you need to buy a new shunt block screw @ $ 80.00 or make your own by threading 8" length of 3/8" BRASS rod (dont use steel).
Can send pics of procedure.

Depending in the city you are in. Here in N California the average price for the Miller Bobcat 225 is 3,425.00. Try your local Praxair Distribution welding store.

If this was useful please vote.

Check the oil safety switch maybe it is bad. It will stop running if low on Oil or wont start.

I had the same problem except it was with a miller welder. it was a bad ground connection on the ground cable. if you have an ohm meter. turn off your machine,but do not unplug it. check for resistance from chassis ground on machine to input ground if your input on the machine is good you may have a bad cable,input connection or the ground clamp may not be making a good connection to the cable. good luck!

clean your contacts your gap should be .008 its like points in a car

The following link will provide you with information about a 225 thunderbolt. We have serviced many Miller welders over the years and find them to be very reliable. Good luck with your project.
http://www.millerwelds.com/om/o316g_mil.pdf

I was warrenty repair shop for lincoln, esab ,miller, hobart,and clark for five years .my expereance with lincoln as far as customer sevice they dropped the ball alot,miller on the other hand had great cusomer service.My opinion the miller family is the way to go for dependability,parts,and service.

did someone turn the dial while welding?what has happened is the contacts are welded in that postion.I worked on welders for lincoln,hobart,esab and miller as warrenty repair shop.I never was able to dislodge the welded contacts to work smooth agian,you have to buy new dial and probley have tech. put it in.

I think I can help you do this, let's start with the general and you can ask questions if we don't cover everything you need.

The HF251D connects to the welding machine using 3 cables, you connect the Electrode terminal on the welding machine (the Lincoln) to the Electrode In terminal inside the HF251. Connect the Work terminal on the Lincoln to the Work In/Out inside the HF251, also connect the work (ground) clamp of your torch to this terminal. Be careful to select the correct size cables for the maximum current you intend to weld with.

The 3rd cable is the gray 14 pin round control cable that comes out the back of the HF251, it needs to be plugged into your Lincolns RMT14 socket. You'll also need to make sure that the Lincoln is set for remote control, this is usually a switch on the front panel. I'm pretty sure that the remote control cables have a standard pin layout, but we can check this by comparing the specs in both owners manuals.

After that you connect the torch and gas bottle to the HF251, start the Lincoln, and TIG weld until you're happy.

I've got a manual for the HF251 and can get a shop manual for it if we need it. What I'm not sure about is your Lincoln - what model is it exactly?

regards,
Carl