Two shear pins in two months

Two shear pins in two months

PostBy: Short Bus On: Thu Dec 25, 2014 7:18 pm

I've broken two sheer pins in the last two months, both broke due to rocks. I only broke one due to rocks, in the previous four years. This is in the "chestnut" sized coal, from the only supplier in Alaska, in Healy. My auger is inside a trade size three inch water pipe, I'm starting to wish it was a four inch.
Short Bus
 
Stoker Coal Boiler: Kewanee boiler with Anchor stoker
Coal Size/Type: Chestnut / Sub-bituminous C
Other Heating: Propane wall furnace back up only


Re: Two shear pins in two months

PostBy: davidmcbeth3 On: Thu Dec 25, 2014 11:59 pm

Rocks? That's terrible. But looks like you're stuck with your supplier, only having one and all.

Maybe time to stock up on pins and other parts...

Or the old handyman's special, duct tape !
davidmcbeth3
 
Coal Size/Type: nut/pea/anthra
Stove/Furnace Make: Hitzer
Stove/Furnace Model: 503

Re: Two shear pins in two months

PostBy: rockwood On: Fri Dec 26, 2014 12:18 am

That sucks!
Have you been using the "chestnut" size all four years?
rockwood
 
Hot Air Coal Stoker Furnace: Stokermatic coal furnace
Hand Fed Coal Stove: Rockwood Stoveworks Circulator
Baseburners & Antiques: Malleable/Monarch Range
Coal Size/Type: Soft coal: Lump and stoker (slack coal)

Re: Two shear pins in two months

PostBy: Hambden Bob On: Fri Dec 26, 2014 7:14 am

Crap ! .... It looks like you either stock up for the "Pinfest" ahead,go to the 4",or...ehh-gads,start screening your supply ! Ulp ! You'll crack this nut wide open,but I'll bet your doing a bunch of common-sense thinking before you do ! Good Luck,My Northern Frontier Friend ! :gee:
Hambden Bob
 
Hot Air Coal Stoker Stove: Harman 1998 Magnum Stoker
Hand Fed Coal Stove: Blower Model Coal Chubby 1982-Serial#0097
Coal Size/Type: Rice-A-Roni ! / Nut
Other Heating: Pro-Pain Forced Air

Re: Two shear pins in two months

PostBy: waldo lemieux On: Fri Dec 26, 2014 12:06 pm

Nut coal through a 3" pipe seems ambitious to me. Maybe try smaller coal?
waldo lemieux
 
Stove/Furnace Make: efm
Stove/Furnace Model: s-20

Re: Two shear pins in two months

PostBy: Short Bus On: Sat Dec 27, 2014 7:02 am

They only screen out two sizes here, 6" to 1 1/2" for hand feed, and 1 1/2" to about 1/2" for stokers, they call it Chestnut. Remember here we are dealing with a different animal, Sub-bituminous coal, tradition has standardized this to different sizes, probably for good reason. This will all blow over, I did the previous four years with only one rock and a piece of steel I let fall in the coal out of my shop. Jumping to a perfect solution isn't always the best plan, but venting on the coal board is easy. Thanks for your support.
Short Bus
 
Stoker Coal Boiler: Kewanee boiler with Anchor stoker
Coal Size/Type: Chestnut / Sub-bituminous C
Other Heating: Propane wall furnace back up only

Re: Two shear pins in two months

PostBy: Short Bus On: Mon Dec 29, 2014 6:51 am

The saga continues, this time I broke an auger, very frustrating, just got it going again. Once I dug the broken auger out, I had to put on snow shoes, and go out digging in the approximate location till I found a spare auger, thank God I had one. I also am glad I noticed the new auger was about five inches longer than the old, and I cut it off before installation. The old auger was probably original from the fifties, cast iron and severally pitted with rust due to about fifty five years of storage and the stoker coming from the bottom of a burned down house in eastern Washington (state). I noticed the new auger had a cast drive lug on it and that was brazed to a shaft and spiral of steel welded to the shaft, should work. I'm sure glad my dad found those two parts stokers in Fairbanks 25 years ago, and they had never been run, and had about five spare augers, one unit was missing the gear box, but can't have everything.
Short Bus
 
Stoker Coal Boiler: Kewanee boiler with Anchor stoker
Coal Size/Type: Chestnut / Sub-bituminous C
Other Heating: Propane wall furnace back up only

Re: Two shear pins in two months

PostBy: rockwood On: Wed Jan 21, 2015 10:32 pm

Had anymore issues with rocks?

How big were the rocks that broke the shear pins and auger?
rockwood
 
Hot Air Coal Stoker Furnace: Stokermatic coal furnace
Hand Fed Coal Stove: Rockwood Stoveworks Circulator
Baseburners & Antiques: Malleable/Monarch Range
Coal Size/Type: Soft coal: Lump and stoker (slack coal)


Re: Two shear pins in two months

PostBy: hank2 On: Thu Jan 22, 2015 8:56 pm

Good going on the spare parts, Short Bus! Your Dad was wise to pick up those spare stokers, years a go.
Many years ago I lived in an ancient stone mill building converted to a home. Heated the place ( or tried to) with an obsolete stoker boiler made by a defunct company called Bair-matic ( or Bair-o-matic?). Believe they were from Schuylkill Haven, Pa. Parts were unobtanium. By luck, I heard of a scrapper that had some Bair-matic stuff. Picked up a couple sets of nice condition iron grate bars. They tended to warp every five years to an unusable point. That old stoker ran 365 days a year except for a once a year clean out.
Rocks are bad news. I'm getting about one rock, or slag piece in about every hopper full with my hand fired. The coal is otherwise real good quality. I believe that I almost broke off the shaker handle a couple of times.

Hope that your auger troubles are done for a long time.
hank2
hank2
 
Hand Fed Coal Stove: DS Machine 1400 WH ciculator; 1880's small cannon in reserve
Coal Size/Type: Nut
Other Heating: small New Yorker oil fired boiler; mostly used for domestic HW