Tri-Burner Fix

A Coal stoker furnace or stove controls most operations including automatically feeding the coal. They are quite similar to any conventional oil and gas units and easily operated for extended periods of time. They commonly use rice coal but may use larger sizes like buckwheat. They can be used as primary heat, supplementary heat or have a dual set up with your existing oil/gas furnace.
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pconn171
Member
Posts: 83
Joined: Mon. Sep. 08, 2008 12:57 pm
Stove/Furnace Make: Reading
Stove/Furnace Model: Susquehanna
Location: Pittsburgh, PA

Post Wed. Dec. 26, 2012 11:12 pm

My tri-burner motor stopped working and at first glance I thought I would need to replace the stoker because it's quite an integrated system. I took it apart and realized that the bushing was a little sloppy. My thought was that the dusty fines were wearing on the bushing causing some excessive play. The shaft that rides in the bushing is also the shaft that centers the rotor in the stator. I think that the play became so large that the rotor was actually touching the stator wall preventing it from spinning. My fix was to replace the bushing with a bearing. The shaft was a strange dimension that didn't offer a direct drop-in bearing so I had to add an adapter to the shaft to fit a standard bearing. The bearing is sealed and should perform much better than the factory bushing. (fyi - I contacted the factory that made the motor to see if they had the same spec with a sealed bearing option and they didn't offer the unit anymore and they said they didn't make them for Reading Stove anymore)

Been running 24/7 since October without a hiccup or an indication that it wasn't the proper fix. Before updating, it wouldn't even spin and if it did, it vibrated excessively and would stop intermittently.

Below are my pics of the fix...
Stock Assembly.JPG
Stock Bushing.JPG
Stock Shaft.JPG
Updated Shaft with Adapter.JPG
Sealed Bearing.JPG
Updated Assembly.JPG

jtmalt
New Member
Posts: 12
Joined: Thu. May. 10, 2012 11:49 pm
Stove/Furnace Make: Alaska
Stove/Furnace Model: Kast Console II

Post Wed. Dec. 26, 2012 11:43 pm

Wow, that's a pretty impressive fix. I never would have thought you could get a sealed bearing for that, let alone a shaft adapter!

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Rick 386
Member
Posts: 2474
Joined: Mon. Jan. 28, 2008 4:26 pm
Stoker Coal Boiler: AA 260 heating both sides of twin farmhouse
Hot Air Coal Stoker Stove: LL Hyfire II w/ coaltrol in garage
Coal Size/Type: Pea in AA 260, Rice in LL Hyfire II
Other Heating: Gas fired infared at work
Location: Royersford, Pa
Contact:

Post Thu. Dec. 27, 2012 8:34 am

Nice but can you supply part numbers and/or source so that others may be able to rebuild their tri burner motors ??

Rick
Master of "Trial and Error."


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LsFarm
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Posts: 7385
Joined: Sun. Nov. 20, 2005 8:02 pm
Stoker Coal Boiler: Axeman Anderson 260
Hand Fed Coal Boiler: Self-built 'Big Bertha' SS Boiler
Baseburners & Antiques: Keystone 11, Art Garland
Location: Michigan

Post Thu. Dec. 27, 2012 10:45 am

Very nicely done!! did you machine the shaft adapter or was it commercially available?

Greg L
Burning Pea/Buckwheat through an antique stoker [semi retired SSboiler],
Running an Axeman-Anderson 260M boiler burning Pea, About 150-250#per day
Farming, Fixing, Fabricating and Flying: 'spare time' what's that?

pconn171
Member
Posts: 83
Joined: Mon. Sep. 08, 2008 12:57 pm
Stove/Furnace Make: Reading
Stove/Furnace Model: Susquehanna
Location: Pittsburgh, PA

Post Fri. Dec. 28, 2012 10:03 pm

Sorry - no these aren't commercially available. I had them custom machined from a machine shop. The drawings are below for the parts and the bearing was purchased from McMaster Carr - part# 6384K342. The press fit with the bearing was a little on the tight side so I'd modify the hole diameter a little if you were to copy this.
Bearing Housing.PDF
(55.79 KiB) Downloaded 40 times
Sleeve.PDF
(56.5 KiB) Downloaded 24 times

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Freddy
Member
Posts: 6603
Joined: Fri. Apr. 11, 2008 2:54 pm
Stoker Coal Boiler: Axeman Anderson 130 (pea)
Hot Air Coal Stoker Stove: Reading piece o' junk in the barn (rice)
Coal Size/Type: Pea size, Superior, deep mined
Location: Orrington, Maine

Post Sat. Dec. 29, 2012 5:32 am

Very cool. I love little projects like this! Are there two, one for the other end of the shaft? Or...is that what is the sleeve is for?

Thanks for sharing.
Orrington, Maine
Fred

"If you can't say something nice, don't say anything at all".


pconn171
Member
Posts: 83
Joined: Mon. Sep. 08, 2008 12:57 pm
Stove/Furnace Make: Reading
Stove/Furnace Model: Susquehanna
Location: Pittsburgh, PA

Post Sun. Dec. 30, 2012 9:06 pm

I'm not exactly sure what the other side is. I'd have to take another look. It's the side that has the gear on it that fits into the gear reduction system so it might be guided by that. It's definitely in a cleaner area and it facing downward though so the dust wouldn't fall into it.

The shaft adapter is purely because the shaft is a very strange diameter and you can't get a standard bearing and/or bushing to fit it. It's not metric or a standard SAE size so I just made an adaptation to use a standard bearing.

coaldale
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Posts: 5
Joined: Tue. Mar. 02, 2010 2:24 pm
Stove/Furnace Make: reading
Stove/Furnace Model: lehigh

Post Sat. Jan. 05, 2013 1:18 pm

Did you ever consider having more of them made and selling them?

pconn171
Member
Posts: 83
Joined: Mon. Sep. 08, 2008 12:57 pm
Stove/Furnace Make: Reading
Stove/Furnace Model: Susquehanna
Location: Pittsburgh, PA

Post Tue. Feb. 05, 2013 12:29 pm

coaldale wrote:Did you ever consider having more of them made and selling them?
I did at first, but I don't think there's a huge market for this, which is why I put the drawings up anyway. I also don't know if all tri-burners are the same, but I know this one fits mine.

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