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Welding Shop

Miller Big 30A


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  #1  
Old 07-13-2018, 12:42:43 PM
J.B. Castagnos J.B. Castagnos is online now
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Default Miller Big 30A

I picked up a Miller Big 30A welding machine, I think early 90's vintage. It was going to scrap, went under water in flood 2 years ago. Someone had drained the crankcase and filled the Deutz engine with Diesel. I drained and filled with oil, drained the fuel tank, replaced filters. Had to remove the fuel cut solenoid to get it started, replaced and it now starts and runs. The generator produces 130 vac, 61 cycles. The welding machine isn't producing. Is there a trouble chart available for these machines? There's a voltage control knob for the welder, I would think this would excite it, goes through a circuit board. It's amazing how quick the engine starts cold with no glow plugs.
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Old 07-16-2018, 09:44:19 PM
Railroads Railroads is offline
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Default Re: Miller Big 30A

Never lucky enough to happen across anything cool like this. There probably is some kind of trouble shooting chart for this machine. Might better post in the generator section. Welding section is a little quite more often than not.

Robert
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Old 07-21-2018, 04:52:53 PM
rprohask rprohask is offline
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Default Re: Miller Big 30A

Not to draw folks away from this forum, but I got a great deal of help on the MillerWelds
website:
https://forum.millerwelds.com/forum/welding-discussions

Posting requires a login, but searches (I think) don't. There is also a support website, from
which you might be able to obtain some manuals:
https://www.millerwelds.com/support/manuals-and-parts

The site wants a serial number to find manuals, but that never worked well for me,
It's also possible to search by hand using the model number and that worked better.

If the machine drowned in fresh water I think there's a good chance of reviving it.
If it drowned in salt, I'd hesitate to spend much (any!) money getting it going.

Good luck,

bob prohaska
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Old 07-26-2018, 10:24:05 PM
J.B. Castagnos J.B. Castagnos is online now
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Default Re: Miller Big 30A

Thanks for the responses guys, I never saw them until I went to post this. This machine was fresh water, happened in the flood of August 2016. I requested help from the Miller tech line by email, never got a response. I decided to give them a call, tech was very helpful, sent a service manual by email. Checking the diagrams and going over the wiring we found that the exciter wire was on the wrong terminal, don't know when this happened. It now produces voltage and will strike an arc, have to put leads on it to see how it welds, looks promising. This machine was 30 miles away, I paid a friend with a roll back to pick it up for me, oil and filters, fresh fuel and fuel hoses, still under $100 total invested. I hate to turn something down when it's offered, don't want to ruin my bad reputation.
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Old 07-27-2018, 06:30:05 AM
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Elden DuRand Elden DuRand is offline
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Default Re: Miller Big 30A

J.B.:

You must be like me. I get great pleasure in "cheating the junk man".

It surprises me the amount of stuff that is thrown away and how little it takes to make it useful again.
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Old 07-27-2018, 07:03:35 AM
AngrySailor AngrySailor is offline
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Default Re: Miller Big 30A

Quote:
Originally Posted by Elden DuRand View Post
J.B.:

You must be like me. I get great pleasure in "cheating the junk man".

It surprises me the amount of stuff that is thrown away and how little it takes to make it useful again.
One guy I know is a scrapie and he is ruthless. He will crush anything for $50/ton or whatever the rate is that day. I was given a box of brand new brass ball valves from 1/8-1 1/4” npt, about 50 valves all with tags still on them. He saw it and says “I can get $x per pound for those! I said no I will be using some and the rest are probably $10-30 each. His response was “yeah but if they were mine I would t be waiting for someone to buy them when I can get my money now” I can only imagine the rare/useful stuff that gets crushed but hey, we gotta ban drinking straws!

J.B. Glad to hear you got it working!
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Old 08-07-2018, 07:55:17 PM
dkamp dkamp is offline
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Default Re: Miller Big 30A

Scrappies allow nothing to get between them, and their next hit of meth. Got a buddy that works at a yard, saw four pieces of large copper come in, sawed up with a sawzall... scrapper got $48 bucks for it, and was arrested at the gate as he left. It was a section of radio broadcast transmission line, stolen from a jobsite the day before. Cost for that piece was $6,700.

Jail.
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