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Welding Shop

Hobart GR303


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  #1  
Old 04-08-2018, 11:27:46 AM
DJB6.03CE DJB6.03CE is offline
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Default Hobart GR303

Good day
In a few weeks I will have my hands on a Ford six driven Hobart Brothers welder.

Any chance someone would have a manual I could get a copy of?

Generator hasn't been used for ten years but I was told it was working when it was laid up.

It's on its factory trailer for 500CAD

Scrap value should be atleast that if I can't get it running.
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Old 08-25-2018, 06:13:03 PM
DJB6.03CE DJB6.03CE is offline
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Default Re: Hobart GR303

https://i.imgur.com/PpU4c8s.jpg

---------- Post added at 04:13:25 PM ---------- Previous post was at 04:07:55 PM ----------







Finally got around to fixing a Hobart GR303 spec 5404.
new fuel pump, voltage regulator, carburetor, idle control board, belts hoses, alternator, GM HEI style distributor and a few new gauges.

---------- Post added at 04:30:32 PM ---------- Previous post was at 04:13:25 PM ----------

https://youtu.be/Oo1-ZBKP0ZI

---------- Post added at 05:13:03 PM ---------- Previous post was at 04:30:32 PM ----------

Close up of the auto idle board substitution I used.
The factory board uses a negative trigger, this one uses a positive trigger. Pretty easy to change.

http://imgur.com/gallery/UBchbM3

And the feild flash board first thing to check if welder has no output.

http://imgur.com/gallery/87NTQWu
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  #3  
Old 08-25-2018, 06:16:50 PM
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Default Re: Hobart GR303

Pretty good old machines and very smooth in arc quality. That 200ci Ford engine is very reliable and parts are easily sourced.
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Old 12-17-2018, 11:21:22 PM
CrisHart CrisHart is offline
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Default Re: Hobart GR303

I have some salvaged parts from a GR303 as well as a copy of the manual in pdf form. This had the 170 CC Ford engine. The salvaged parts are a motor control board, a small board with diodes, and the large diodes mounted to a board between the engine and the genny. And a few resistors, etc. San Francisco CA---free to anyone who needs to rebuild their GR303! If outside my area I will pack and ship for nominal fee.
Moderators--if I'm not allowed to trade here please lmk and I'll refrain from doing so.
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Old 12-18-2018, 08:39:14 AM
DJB6.03CE DJB6.03CE is offline
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Default Re: Hobart GR303

Those parts sound like gold for someone.!!
Not a lot of parts for these out there.
Thankfully they are pretty simple machines.
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Old 01-26-2019, 02:13:31 PM
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Default Re: Hobart GR303

Blasting through some 1/4 inch plate with a 1/8th rod.
At 300amps and 90ocv just for fun.
Testing auto idle down.

https://youtu.be/7tE2rEpKXdg
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