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Thanks to all involved for your advice, after checking the circuits as advised by Eddie 49 and making a new bush for the variac controlling the voltage all seems to be working. When I tested the diodes the right one was0.6 the left one was 0.47 I hope these readings are ok. Again thanks for your...

The diodes are hopefully the Plessey ones I have inserted an image of

Thanks for your help. I removed and tested the two diodes on the aluminium plate and got no reading either way. When I hold in the contactor in nothing happens, I will have another look while testing using your advice.

sorry to seem ignorant, down to no experience, can you tell me which is the rectifier? Also have you any idea where I can purchase new brushes for the rheostat

Checked the tip to earth nothing on it

Sorry to be a nuisance, yet again. everything seems to be working now contractors wire feed and gas but I now find I have no spark, any suggestions please.

Resoldered pcb joints, don’t know which one was at fault, but it’s now working. Thanks for your help much appreciated.

Removed the plastic case and held in relay, wire feed roller continues to work but contactor drops out, but roller continues to work without trigger pulled in. Tried new relay still the same as original fault

Thanks for your information, it’s infuriating, it worked great. I didn’t use it for a while then when I needed it it wouldn’t work

I have a boc Transmig 140, when I operate the trigger the contactor pulls in, it operates the wire feed and gas, but drops straight out. Can anyone please help

Thanks for your help.sorry about the delay in responding.

How do I start a new thread, my problem is Transmig not working. Relay works, when trigger is pulled contactor pulls in and trips straight out. Wire feed and gas start momentarily.while contactor is in. Any help would be greatly appreciated