Contactor for a Hobart Handler 135

Date 01-03-2013 01:22

Those little un-hobarts have IC relays in them. More then likely the relay the trigger is connected to took a dump. They have a habit of the relays failing and techs replace the board at about 2/3 the cost of the machine. They are replaceable...but I am sorry I forget where I found them. If I stumble on it I will send you the link. First thing trace the trigger/gun wires back to the board and make sure your getting closed/open at the board.

By jwright650 (*****)

Date 01-03-2013 13:06

Thanks Tommy...I'll try to do some additional troubleshooting with my meter on the lil machine and see if that lil relay is the culprit. I haven't opened the case yet, I was assuming it had a set of contactors that pulled in when the trigger closed. I laid a screwdriver across the terminals where the trigger wires plug into the back of the board on the "door side" of the cabinent(nothing happened, no wire feed)....like I stated, I haven't opened up the box yet. I expect the relay didn't like the triggering to tack that sheetmetal to the door frame of my garage.
Post up a link where you found that relay, if you think about it later.

By Northweldor (***)

Date 01-03-2013 14:18 Edited 01-03-2013 14:32

Thyristor failure is quite common. Try opening the box and jumping the thyristor contacts. Also, a phone call to Hobart's excellent service dept. will likely find a technician who will guide you through test procedures beyond those in your manual, and supply part #s which can be ordered at your local Miller dealer. A search on the Hobart forum will get you much more information, and if all else fails, this outfit has been used successfully by some Hobart users for board repair/replacement.

http://innovatcorp.com/

By jwright650 (*****)

Date 01-03-2013 14:35

Thanks Ron.
I'll crack open the case and see what's inside. Thanks for the reminder about using Hobart's service department.