1969 miller big 40

[Justinchearne]

Hey thanks.

[ryanjones2150]

My limited electronics experience tells me that's what resistors do, get hot. It might be normal.

[Justinchearne]

Have another question for yall. On the adjustable resistor R2 in diagram. I was wondering what ohm is needed for this. Right now it's at 11 which is what I measured the old one at. Reason I ask is when I'm welding it gets pretty warm. The rheostat is not getting hot and the wires aren't but the resistor is. It's a 20 ohm resistor as per the parts list. Thanks

[Justinchearne]

Hey thanks man. Heck I had to get it welding so I can build a gas tank for it. My plastic can with a pipe nipple screwed in the bottom isn't really working out for a tank.

[ryanjones2150]

I'm not smart enough to post pictures either. It's cool you got an old wore machine and brought it back to life. That's my style brother.

[Justinchearne]

I guess this is the only one I can post for some reason. It says file size to big. Stands to reason I guess it is a Big 40. I'll take more of welder and try again

[H80N]

Yes sir. I'll post some more pics when I get it all painted. I painted engine when I got it back from machine shop and put it together. Well seems I'm not smart enough to post the pics I have.

They upgraded the system so some stuff is a bit odd... try this...

http://forum.millerwelds.com/forum/welding-discussions/563100-posting-images-to-the-forums

[Justinchearne]

Yes sir. I'll post some more pics when I get it all painted. I painted engine when I got it back from machine shop and put it together. Well seems I'm not smart enough to post the pics I have.

[H80N]

Pretty neat when a company supports a 46 year old piece of equip....

just one of the many reasons I buy and use blue

Just the best... Period...

[H80N]

Thank you I called the number you sent. They emailed me a complete manual and its welding now.

Very Cool...!!!!.... glad to help.

how about some pics...??

are you going to paint it and clean it up..??

bet there are a lot of years left in it.....

[Justinchearne]

Thank you I called the number you sent. They emailed me a complete manual and its welding now.

[H80N]

if that does not work for you... give them a call and they may be able to email you the page or photocopy the manual for a fee

1-800-4-A-MILLER (1-800-426-4553)

Many times they will email the pertinent page for free as part of their customer support... they really go the extra mile...

[Justinchearne]

I looked at the 1973 schematic and I saw that one only has 3 brushes on the rear of the rotor. Where as mine as two in the rear and two about midway. I've looked all over Internet and the only thing I can come up with is. Early 70's.

[Justinchearne]

I looked at the 1973 schematic and I saw that one only has 3 brushes on the rear of the rotor. Where as mine as two in the rear and two about midway. I've looked all over Internet and the only thing I can come up with is. Early 70's.

[H80N]

My guess i that the 1973 schematic is darned close if not identical to the 1969

See page 15 Figure 11-1

https://www.millerwelds.com/files/owners-manuals/O450_MIL.pdf#page=19&zoom=140,-33,391

if that does not work for you... give them a call and they may be able to email you the page or photocopy the manual for a fee

1-800-4-A-MILLER (1-800-426-4553)