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Lincwelder 225 Rotor Removal


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  #1  
Old 12-28-2014, 09:52:21 PM
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Default Lincwelder 225 Rotor Removal

Today I picked up a Lincoln Lincwelder 225 for $100. The engine is locked up because of the upturned exhaust allowed water to enter the engine. This is not an issue as we have a NOS Onan with the correct tapered shaft sitting in the shop we plan to replace the Original Onan CCKA with. My question is, from my research the rotor has a left hand ACME thread in it and it is 5/8-10 pitch... is this correct for all units? I am comfortable with building a puller, but I would like to verify the thread pitch. I have read that common practice is to re-thread the end of the rotor to 5/8-11 NC left hand as this is an easier to obtain thread. Has anyone on here done this?
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Old 12-30-2014, 03:40:53 AM
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Default Re: Lincwelder 225 Rotor Removal

No taper on the rotor. It's bolted to the big fan/adapter that has the taper.

Release/pull "ALL" the brushes. Remove/unbolt the rotor support bearing retainer, Pull motor and rotor out together. It's been a few years since I pulled one but that's the basics.

The later Lincolns with an Onan and a "single" starting battery have the tapered rotors. The dual battery Lincwelder 225DC rotor has 4 or 6 bolts attaching it to that fan/adapter.

Might have a picture of the rotor around here someplace....
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Old 12-30-2014, 02:25:32 PM
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Default Re: Lincwelder 225 Rotor Removal

6 bolts it is...
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Old 01-02-2015, 01:35:46 AM
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Default Re: Lincwelder 225 Rotor Removal

Thanks! It has the dual batteries, so the fan is on the crank then? Anything specia (i.e.a tool)l to pulling the fan off the tapered crank? We haven't had time to pull it down yet. When the new engine goes on, it'll be a single battery system as the NOS engine we have has its own starter motor so we figure going stand alone simplifies the whole thing (not to mention requires only the cost of one battery). We also have to wire in a 220v outlet when we reassemble as currently it only has the twin 110v outlets.
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Old 03-25-2016, 10:31:54 PM
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Default Re: Lincwelder 225 Rotor Removal

Its been a while, but the welder is back together with a NOS onan p218 we had (pulled from a generator in a brand new RV almost 20 years ago as the owner insisted he'd rather have a Kohler engine on the generator)... Interesting enough, the crank on the oem welder engine did have taper to it, but different from what the replacement engine had. Somewhere we have another NOS crank for the engine that would have been correct for the welder... after searching for it for literally months, we decided we'd have to make due! So, a little machine work was required we bored the OEM crank (leaving it a little under sized for a sweat fit), turned off the portion we needed and then heated it and pressed it into place. We decided to drill and place a roll pin just to make sure it couldn't slip. With the rotor providing external support, there shouldn't be an issue.


We also had to make a couple of custom exhaust manifolds for it, nothing big there though. Little plate and a pipe nipple took care of that:


Quick run:




It still needs some finish work, but runs well and should make for a nice back-up generator and portable welder as the need arises.
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