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Hobart air force 400 plasma cutter. Power on, changed tip, nut when press gun, power light goes out and makes a power surge sound?

Posted by Anonymous on

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Posted on Jan 02, 2017

co7196
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Do you prefer a hobart? This is one reason not to buy one. They are hard to get service for also.I've owned and used extensively several plasma cutters and the best in my opinion is the thermal dynamic 3/8
Its easy on consumables and can sliver stainless to 1/32 . Hobarts are home depot grade. that is probably the best place to find one. good luck

Posted on Jun 24, 2009

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1 Answer

Why dont i have any power to my hobart plazma cutter


Maybe blew a fuse . maybe malfuncttion. i would contact company for proper assistance.
Customer Service Hobart Welders

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Machine turns on, air compressor runs but will not strike an arc


sounds like the voltage is not getting to the tip. I would suggest taking this in for repair.

Dec 07, 2013 | Hobart Airforce 250ci Plasma Cutter 12...

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Hobart 400 plasma cutter. when i hit the trigger nothing but one short blast of air.


Make sure you have a good ground. If ground is good, make sure you are holding the tip level to the work and right up close.

Aug 31, 2011 | Hobart Plasma Cutter - Airforce 400

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Only cuts for 3 seconds, device still on


Possibly an internal short in the torch tip... the expendable components failing in the tip will cause the sensors in the machine to register a "no cut" or "free air arc" state and kill the power to the tip to prevent damage to the unit. Replace the tip components and double check the grounds connections.

Apr 03, 2010 | Hobart Airforce 250ci Light Weight Plasma...

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Hobart airforce 250 ci has power but will not operate


make sure that there is air to the plasma and set at the proper psi. Make sure that the contact tip and nozzle is in the cutting head correct.

Dec 18, 2009 | Hobart Airforce 250ci Plasma Cutter 12...

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Troubleshooting help


Hi,


I would recommend replacing the electrode, and maybe the tip, other that that it sounds like you aren't getting a good enough ground for it to start.

Aug 23, 2009 | Hobart 500474 Airforce 400 Plasma Cutter

2 Answers

Safety light


check the gun lead all the way back to unit,if there is a nic or cut in that lead (main power lead)the unit will not fire,sadly you cannot fix the lead ,it has to be replace with new one,

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Hobart 250 has power to unit, but will not run.none of the lights come on.


Sounds like you have more than one problem. Check all fuses. Bringing it to a welder repair shop might be a good idea. Welding suppy houses may be able to help you in your area, and maybe recommend someone.

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