DF520 Burner pot question

I have a DF520 that I am rebuilding but I ran into a problem. The burner pot is different from anything I have seen on this site. This site has pictures of the burner pot on the bottom of the pot you can see the round clean out cover. On my unit where the clean-out cover is there is a elbow that goes there that the worm sits it and it also contains the worm bushing. This elbow goes through the clean-out cover ( the clean out cover rides on this elbow housing ) and sticks up a little inside the pot and has a taper on the top of it so the grates can set on it. Does anyone know what kind of pot this is and what the part number is or any information on this part. I can not seem to find this type of assembly anywhere I hope I gave you a good discription of it.

Nightman wrote:I have a DF520 that I am rebuilding but I ran into a problem. The burner pot is different from anything I have seen on this site. This site has pictures of the burner pot on the bottom of the pot you can see the round clean out cover. On my unit where the clean-out cover is there is a elbow that goes there that the worm sits it and it also contains the worm bushing. This elbow goes through the clean-out cover ( the clean out cover rides on this elbow housing ) and sticks up a little inside the pot and has a taper on the top of it so the grates can set on it. Does anyone know what kind of pot this is and what the part number is or any information on this part. I can not seem to find this type of assembly anywhere I hope I gave you a good discription of it.

Does it look like a gooseneck on the bottom of the pot the auger pipe fits in it and feeds the coal up from the bottom
instend of the side of the pot if so you have a old style EFM pot they used it on the 350 & the 520 the 520 had a bigger ring on it what size is it across the pot with the ring on it 14 1/2 or larger And does your DF have a round door or a
Square one if you take the front Jacket off you will see the info plate on the boiler with the year on it and ser# if you need Parts PM Scraper 23jr he refurbs all EFM's and has Parts

That is what it looks like a gooseneck that feeds the coal from the bottom of the pot. As for the size of the door I do not have that or the boiler unit. I only have the section that is attached to the back plate. Do you know if there is a parts breakbown on this unit anywhere so I can see what parts I need.

Nightman wrote:That is what it looks *censored* a gooseneck that feeds the coal from the bottom of the pot. As for the size of the door I do not have that or the boiler unit. I only have the section that is attached to the back plate. Do you know if there is a parts breakbown on this unit anywhere so I can see what parts I need.

Then your veiwing door is Round a door if you have a two piece door Memeber Scraper 23 jr will have all of the info you will need and parts PM him or PM me and I will give you his Number The only parts on the Pot is the pot bushing for the auger 6 grates a clean out ring the top pot ring two set screws on the gooseneck to hold the auger tube in and the two bolts to hold the gooseneck on the pot and there should be three stopper clips one on each side on the bottom of the pot to stop the cleanout ring from spinnig all the way around you also need the three gaskets one for under top ring one under the top of the grates and one for the bottom of the grates How is you augers & tubes also look at auger bushing for wear and the auger flights if they are thin and sharp you will need a new one how many augers do you have a short one 38 1/2 inch the long one would be 68 1/2 inch The short auger tube should be 24" the long one should be 62" do you
have the coupler to Put the tubes together you only need it if you are going to use both augers PM me if you need more info

I will check the bushing tomorrow to see if there is any wear. There are 3 stopper clips.I will have to check the auger bushing for ware.I will pm you tomorrow to night once I check everything out. Thanks a lot for the help you sure know a lot about you EFM's thats fir sure.

Ok and yes there are three clips on the 350 pot and two on the 520 pot

The man is a walking encyclopedia.

Those pots were used from the late 40's thru the mid 50's approximately. The disadvantage was that if you burned out the bottom of the pot, then entire pot assembly had to be replaced, whereas, on the newer design, only the gooseneck assembly needs to be replaced.

Here are pictures of the old style pot. This pot is using the 14 1/2" burner ring, which is currently used on the 520. There is also a 15 1/2" ring available as an option for the 520, which will allow about an extra 5,000 BTUH of heat.

One more note on this I do not think you have a DF520 The DF means Duel fuel you can burn fuel oil aswell as coal with the New DF520 The DF came out around 1981 what you have is Much older your unit could be the older 350 model or a older SF520 SF means Stoker fed boiler If the pot with the ring on it is 14 1/2 " then it would be a 350 pot if the pot with ring is 15 1/2 then it is a 520 but it also will work in the 350 with the 15 1/2 pot ring on it Take the front Jacket off the boiler and look at the info Plate There will be The Name of the boiler maker and the year it was made also will have a ser # on it Post it here and Stoker-man will give more info about it Also if the door is a two Piece one then it was made before 82 Because after 82 all of the doors are square door models before 82 they where Two Piece Round doors The square door is one Piece the door frame is part of the boiler The round door frame will bolt onto the boiler then the door goes on that also check your PM's

That is the exact one that I have and that is the exact gooseneck that I need I left PM to Scraper 23jr to see if he has anything like it I sure hope there is one around. As you can see on the picture the tapered flange on the top is wore away.

I know scrapper has one, because I have his pot assembly at efm.

coalberner, the current 520 uses a 14 1/2" ring or the rarely used option of 15 1/2"

It does have the round door. also it is the 14 1/2 ring. My friend spoke to scraper and we will be going to his place to see what he has in his stock. Because we are not just rebuilding an old efm pot assy. But also building the outer housing of the furnace to convert it over to a forced hot air system. Scraper said he might have some parts that will work for the conversion.

If you need a furnace, they are available new.

stoker-man wrote:I know scrapper has one, because I have his pot assembly at efm.

coalberner, the current 520 uses a 14 1/2" ring or the rarely used option of 15 1/2"

I know that the new 520 uses 14 1/2 pot ring what I was saying is the 15 1/2 can be used on both 520 or 350 aswell
Nightmans Friend as two 520's one new and one older one I was at Steves when the guy called yesterday