Motor for 520

Stoker Coal Boilers automatically feed the coal and have controls and pumps just like any conventions boiler. They are intended to be used as a primary heat and often have domestic hot water coils as an added bonus. They can be set up independently or in dual sytem with your existing oil/gas boiler. They can accommodate both hot water base board or steam plumbing.
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Dave 1234
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Posts: 189
Joined: Tue. Nov. 13, 2012 9:05 am
Stoker Coal Boiler: 1948 International boiler, EFM S-20 stoker
Coal Size/Type: Buck,
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Post Tue. Oct. 15, 2013 7:21 am

Good morning all,
My motor on the 520 is getting noisey. I think some place I read about a replacment motor that is needle bearing design.
Does anyone have experience with this? Any motor model numbers to call and order?

Thanks Dave

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Rob R.
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Posts: 11368
Joined: Fri. Dec. 28, 2007 4:26 pm
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Tue. Oct. 15, 2013 10:09 am

Make sure the fan isn't loose on the shaft.

I am running a Marathon motor on mine, perfect fit and smooth operation. Item # 4782 from http://www.marathon-motors.com

Note, the motor is fully enclosed, not open on the face like the one in the picture.

Visit Alternate Heating Sytems

Dave 1234
Member
Posts: 189
Joined: Tue. Nov. 13, 2012 9:05 am
Stoker Coal Boiler: 1948 International boiler, EFM S-20 stoker
Coal Size/Type: Buck,
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Post Thu. Oct. 17, 2013 7:06 am

Rob Thanks !
I took the motor and housing off last night. Both the housing bolts and the motor bolts were loose. The fan is tight, she is much quieter now.
The fan is sheet metal, did the old ones use cast iron? Will an old one fit in my housing ?

Dave

User avatar
Rob R.
Site Moderator
Posts: 11368
Joined: Fri. Dec. 28, 2007 4:26 pm
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Thu. Oct. 17, 2013 9:48 pm

As far as I know, the fans have always been steel. The newer ones use a different coupling between the fan and the gearbox, but the original design works well and is preferred by many.

I had the same problem one time...changed the motor and put it all together finger tight. Tested fine, and then I forgot to snug the bolts. Next day it was vibrating pretty good, 10 second fix.

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