Have Hobart 140 Handler, The motor won't run to feed the wire, even whith out wire. gas will come on when trigger depressed.Where can I find parts to fix?

Make sure the trigger switch is applying power to the motor. If there is no reading when you checked for OHMS then the motor is open. You'll have to get a new one.

Looking at the Hobart manuals, that is how they set them up at the factory.

One way to make a change to that is to wire in a solid state relay or solid state Triac and pick up an energizing voltage off of location RC2-1 or RC2-2 on the control board when the trigger is pressed, or as an alternate location from the feed motor through a resistor and rectifier. Once you know if the voltage goes low, or voltage goes high at your point of signal, you pick the contact you want on the relay so when the wire is feeding out, the gas is flowing. and when it is not feeding wire out, the gas is shut off.

Sound like you have a bad trigger on the gun. Does gas spray when you pull the trigger? Check the wire plug that goes from the pistol to the unit. It should be under the liner hose where it connects to the machine. Then use a voltage meter on the wires going to the drive feed motor, and see if you get current when you pull the trigger. If gas doesn't spray neither, sounds like you got a bad trigger switch

Probably the bridge rectifier. I had a 120 and thats what happened to it...

If the machine has diodes check them. Also if it has a bridge rectifier check it. My 120 would not feed wire and the bridge rectifier was bad.

Take the drive motor off and blow out dust, chips, wire pieces, etc. and then rinse out with contact cleaner, blow dry, re-install. Had to do this every so often with mine. Hope that helps.

You do not indicate if the wire is already out of the nozzle. If not, commonly the wire can jab the side of the tube it runs through and cannot advance.

IF the wire is already threaded, then there MAY be a fuse to protect the motor.

The click MAY be the gas valve, or the relay driving the motor and/or the main transformer for welding current. The circuitry for these is relatively simple and a voltmeter is your friend to troubleshoot this.

Make sure selector switch is not in between settings, this is where the wire feed voltage comes from.

does it have a reset button? if so it has gone bad, if not there is a fuse or something inside. they protect that circuit against shorting at the working end of the gun. happens ALL the time.
Hawk

A schematic would certainly help, give Hobart a call and ask for a wiring diagram. or manual. Hobart are very helpful and may even give you guidance, you may have to pay the postage, they usually fax these documents so it will not cost you anything.