350 restoration

350 restoration

PostBy: plumber On: Tue Mar 18, 2014 7:40 pm

So I'm attempting to restore a 350. So far I've snapped a few studs off the panel where the Flue is. Any suggestions on how to repair them. Are the studs anything special?
As well, what should I use to seal the panels back up? What's on there now looks like ribbon gasket.
Oh, I've also got to get some plugs and bushings out of the boiler. The guy who had this before had a 3/4 supply and return, and only used one side.
So far I broke some studs and need a new tankless coil.
plumber
 
Stoker Coal Boiler: EFM 350

Re: 350 restoration

PostBy: Rob R. On: Tue Mar 18, 2014 8:08 pm

Are you using the hot wrench on those fasteners?
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: 350 restoration

PostBy: plumber On: Tue Mar 18, 2014 8:29 pm

Yup, hot wrench after a few days in a kroil bath. I'm thinking if the studs are nothing special I might drill and tap them and screw in some stainless bolts from the inside.
plumber
 
Stoker Coal Boiler: EFM 350

Re: 350 restoration

PostBy: plumber On: Wed Mar 19, 2014 6:12 am

After further cleaning of the base and taking a closer look at everything. My idea of drilling and tapping the broken fasteners won't work, they would interfere with setting the boiler. They appear to be 5/16 x 1 press studs. Looks like I've got to find a Fastenall. I might as well replace them all while I'm at it as they all look like rough shape, even after running them with a thread chaser. I'm thinking I'll replace them with stainless.
Now to find a coil and figure out how to seal up the panels when I reassemble the base.
plumber
 
Stoker Coal Boiler: EFM 350

Re: 350 restoration

PostBy: Rob R. On: Wed Mar 19, 2014 7:28 am

I use high temperature silicone to seal the side panels, and a piece of flat rope gasket on the rear.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: 350 restoration

PostBy: Pacowy On: Wed Mar 19, 2014 8:20 am

plumber wrote:After further cleaning of the base and taking a closer look at everything. My idea of drilling and tapping the broken fasteners won't work, they would interfere with setting the boiler. They appear to be 5/16 x 1 press studs. Looks like I've got to find a Fastenall.


I think the originals were "elevator bolts". The last time I checked Fastenal didn't carry those, but they did have "step bolts" that are very similar.

Mike
Pacowy
 
Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite

Re: 350 restoration

PostBy: ryan20strohl On: Wed Mar 19, 2014 10:23 am

Y would the flue bolts interfer with setting the boiler on top my father has a 350 and we just drilled out the old ones and welded new bolts in.
ryan20strohl
 
Stoker Coal Boiler: efm stoker and allen stoker
Coal Size/Type: rice and buck
Other Heating: allen stoker
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Re: 350 restoration

PostBy: plumber On: Wed Mar 19, 2014 10:28 am

Not the flue bolts themselves, the studs on the removable panel where the flue is.
plumber
 
Stoker Coal Boiler: EFM 350

Re: 350 restoration

PostBy: plumber On: Wed Mar 19, 2014 10:37 am

Should the ash door have some kind of gasket?
As well, does anyone know what the darker blue is on the older boilers?
plumber
 
Stoker Coal Boiler: EFM 350

Re: 350 restoration

PostBy: Lu47Dan On: Wed Mar 19, 2014 1:18 pm

Plumber, If you have 4-1/2" grinder get a couple thin (0.045" thick) cutting wheels, cut the studs off at the nut, heat the nut red hot, and apply candle wax (paraffin) to the nuts after they cool a little, re heat the nuts to melt the wax. Do this several times than heat them up and try to remove them with a box end wrench.
I have had a few nuts that would not break loose and did this trick to break them loose.
Watch out as the wax creates a lot of smoke when applied to the hot nuts.
Another trick is to just heat the nuts red hot and try to remove them.
When you assemble the new fasteners use copper anti-seize on bolt threads.
Dan.
Lu47Dan
 
Hand Fed Coal Stove: Sears circulator air tight stove.
Other Heating: Crown 115,000 BTU oil fired boiler(house) Weil Mclain 150,000BTU oil fired boiler(Shop)

Re: 350 restoration

PostBy: Rob R. On: Wed Mar 19, 2014 1:32 pm

plumber wrote:Should the ash door have some kind of gasket?


Yes.

Are you rebuilding this unit to sell or are you swapping it for the LL110?
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: 350 restoration

PostBy: plumber On: Wed Mar 19, 2014 1:42 pm

No, the EM is for me. I'm going to put the 350 in my house and the leisure line is going to my rental. It's family occupied, they'll have a choice on what to burn.
Now the ash door, should flat rope gasket on the door work?
plumber
 
Stoker Coal Boiler: EFM 350

Re: 350 restoration

PostBy: Pacowy On: Wed Mar 19, 2014 2:08 pm

plumber wrote: Now the ash door, should flat rope gasket on the door work?


I'd vote for fat instead of flat. The door alignment isn't always great on the older units and a fat round rope gasket provides a little forgiveness for that.

Mike
Pacowy
 
Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite

Re: 350 restoration

PostBy: ricoman2737 On: Wed Mar 19, 2014 2:46 pm

I believe that you can purchase a coil from Tunnessen Radiator. They are located in Hazelton, Pa. Telephone : 570-454-1161.

John
ricoman2737
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Buckwheat
Other Heating: Lennox Fuel Oil boiler as a backup
Stove/Furnace Make: EFM
Stove/Furnace Model: DF520

Re: 350 restoration

PostBy: Rob R. On: Wed Mar 19, 2014 3:13 pm

Pacowy wrote:
plumber wrote: Now the ash door, should flat rope gasket on the door work?


I'd vote for fat instead of flat. The door alignment isn't always great on the older units and a fat round rope gasket provides a little forgiveness for that.

Mike


I used 1/2" or 5/8" rope gasket on mine, can't remember which. Don't go nuts with the glue, it hardens the gasket if you use too much.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy