Chubby fire grate question.

Chubby fire grate question.

PostBy: Coal-Chub-E On: Sat Sep 21, 2013 12:34 pm

While getting my chubby ready for the upcoming season I noticed I have a cracked grate. Which completely shattered when I removed it. Now Inknow why I had such difficulties shaking down my stove last winter. Ok- my question is this- what grate should I purchase. According to the chubby site, it looks like I just need an external shaker grate for $99. No where on the site do they picture the ring shown below. What is that and do I need it? It was sitting on top of the grate. Also, my fire pot style is open with the 6 slots. Thanks in advance for your info and help.
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Coal-Chub-E
 
Hand Fed Coal Stove: Coal Chubby
Stove/Furnace Make: Chubby Coal Stove

Re: Chubby fire grate question.

PostBy: tcalo On: Sat Sep 21, 2013 8:22 pm

Coal-Chub-E, your fire pot looks like it is an older style. There is a newer fire pot available but it's a bit more expensive...$235! The new fire pot is sweeeeet! The grate shakes as if it's on ball bearings. I've owned an older rear vent Chubby stove with the old style fire pot. I now own a top vent Chubby stove with the new style fire pot. I believe the grate you have is the newest grate available. Larry did away with the ring on his newer stoves. They are used on the old style fire pots such as yours. The reason is to prevent coal from jamming the grate. The grate on the old stoves sit above the bottom of the fire pot so coal could easily get jammed between the grate and fire pot wall, the ring prevents this. The grate on the new stoves sit just below the bottom of the fire pot so any coal that would potentially get caught between the grate and fire pot would just fall out completely. There is a discussion in another thread. Here is the link: another chubby. Hope that helped. Better hustle, burning season is almost here!
tcalo
 
Hand Fed Coal Stove: Chubby Coal Stove
Coal Size/Type: Nut Anthracite

Re: Chubby fire grate question.

PostBy: dcrane On: Sun Sep 22, 2013 6:58 am

Tcalo is correct about the new firepot allowing the grate to sit slightly below the bottom of the firepot (which has some advantages in terms of it not warping and cracking like that in the future), The ring you have is still available for both the new style firepot as well as the old (its not required on either and you will get varying opinions on whether or not this helps or hurts jambing), The tolerance on that ring is VERY close and I'm not sure having such a close tolerance at the point of the grate is wise (I know it works like a dream when brand new with no hot coal bed in it, but I don't know first hand how long it can keep up that way with the inevitable expansion, contraction, slight warping, etc. in months/years to come). If I was you... Im just buying a new grate to replace your broke one and you can try burning this year with and without your old ring and let us know what works best please...
dcrane
 
Hand Fed Coal Stove: Crane 404

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Re: Chubby fire grate question.

PostBy: Coal-Chub-E On: Sun Sep 22, 2013 10:08 am

Tcalo,dcrane,

Thanks for your input. So I have some decisions to make. If I weren't so cheap, I'djust buy the new pot and a new grate for $335. The stove was purchased last year as a craigslist find sight unseen for $425 so I knew it may be a risky purchase. Either way, I still love the stove. But, having said that, If there is a cheaper alternative that I'll be happy with then lets do it.

I am going to assume my grate was warped from the day i brought the stove home and that is the reason why I could never really get smooth shakedowns and hence the reason i had low fires or fires that went out every 4 or 5 days due to being ash bound. So, if i simply replace the grate and install w/out the ring, do you think I'll notice improvements in shakedown performance? Also, does my firepot design lend itself to warped grates, meaning ill be spending another $100 in a few years for another grate. If so, then it makes sense to just buy new firepot now and have that assurance going forward.

Also, is the firepot removal/installation tricky? Any tips? I think thats it for questions.

Again, thanks for allyour help.
Coal-Chub-E
 
Hand Fed Coal Stove: Coal Chubby
Stove/Furnace Make: Chubby Coal Stove

Re: Chubby fire grate question.

PostBy: dcrane On: Sun Sep 22, 2013 10:33 am

Lets assume Larry redesigned the new firepot and grate for many reasons (for the better). I cant know if your new grate will work better with or without the ring because I dont have one (I can only say its worth trying because this ring was never an original feature in a Chubby to my knowledge, it came well after the hayday of Chubby Stove Co.). I do know tight tolerances in that particular location is very tricky bussiness (its a fine line between trying to keep clinkers out, yet allowing ash to fall and allowing grate the movment it needs... getting all bound up with fines or not allowing air up through that grate the way it would without that ring in attempt to prevent clinkers from getting between the grate and the cast firepot is a VERY fine line to be walking)... only you can determine what works best for you (Larry makes it available... but frankly, i dont even think he would dictate to you that this ring is better/worst or required)...
dcrane
 
Hand Fed Coal Stove: Crane 404

Re: Chubby fire grate question.

PostBy: tcalo On: Sun Sep 22, 2013 11:20 am

Coal-Chub-E wrote:does my firepot design lend itself to warped grates, meaning ill be spending another $100 in a few years for another grate.

I have the new style fire pot in my stove and experienced a warped grate after just 1 season of burning. Could be just about anything...material itself, over fire? Although I do think there is less stress on the grate with the old style fire pot. Just my opinion, but here is my reasoning. The grate in the old fire pot rests on tabs positioned around the outside of the fire pot giving it more support as it heats up. The grate in the new style fire pot is suspended just by a pin in the center. So logically as the grate heats up there is less support making it more prone to warping.

dcrane wrote:I cant know if your new grate will work better with or without the ring because I dont have one. I do know tight tolerances in that particular location is very tricky bussiness (its a fine line between trying to keep clinkers out, yet allowing ash to fall and allowing grate the movment it needs... getting all bound up with fines or not allowing air up through that grate the way it would without that ring in attempt to prevent clinkers from getting between the grate and the cast firepot is a VERY fine line to be walking)

I ran my stove with and without the ring, it's a double edge sword. With the ring installed there is more ash buildup around the outside of the grate, however the ring keeps most of the ash in the ash pan. Without the ring there is a large amount of ash that falls outside of the ash pan creating more of a mess, the plus side is there is better air flow around the outside edges of the grate so the stove gets less ash bound. It's trial and error, whatever works best for you!
tcalo
 
Hand Fed Coal Stove: Chubby Coal Stove
Coal Size/Type: Nut Anthracite

Re: Chubby fire grate question.

PostBy: dcrane On: Sun Sep 22, 2013 2:41 pm

Larry has designed and makes a new ashpan to fix this small problem your having... call him up and order the new ashpan and a new grate, put the old ring in a closet for this year and your now all set! hope this helped out, if you need help contacting Larry just send a PM (but you should be fine by going to his site and getting his phone).
dcrane
 
Hand Fed Coal Stove: Crane 404

Re: Chubby fire grate question.

PostBy: Coal-Chub-E On: Sun Sep 22, 2013 3:06 pm

Thanks! That's the kind of answer I like! And you saved me over $200! Im gonna buy new grate and the new ash pan! The ring will NOT be used ths winter. Ill let you knw how it works.
Coal-Chub-E
 
Hand Fed Coal Stove: Coal Chubby
Stove/Furnace Make: Chubby Coal Stove

Re: Chubby fire grate question.

PostBy: tcalo On: Sun Sep 22, 2013 4:26 pm

dcrane wrote:Larry has designed and makes a new ashpan to fix this small problem your having

I have the new round ash pan, still get ash outside of it. Not a big deal, I just shovel out the bottom of the stove every few days. Problem is the grate is the same size as the ash pan so it is inevitable that some ash will not make it into the pan. Unfortunately this is the largest pan that fits through the rear opening. It is what it is...happy burning!
tcalo
 
Hand Fed Coal Stove: Chubby Coal Stove
Coal Size/Type: Nut Anthracite

Re: Chubby fire grate question.

PostBy: nortcan On: Sun Sep 22, 2013 6:55 pm

Maybe the outer ring could be grinder to have a slope or an angle to help to avoid ash building up on it. When the grate will moves from shaking the ash if some is on the angle, it will fall down in the ash pan.
nortcan
 
Stove/Furnace Make: Stuart,Peterson/ Grander
Stove/Furnace Model: Sunnyside/ Golden Bride

Re: Chubby fire grate question.

PostBy: GinoF On: Sun Nov 17, 2013 11:24 pm

i also just found a small crack in my grate. I was examing it to see if its warped. while it appears to be beat up its warped only a tad,just enough to make shaking difficult. The issue of getting stuck has also to do with the old firepot in my case. I'm working.on modifying or making an insert that converts the old firepot into a modified one which would allow me to shake it down even with the slight warp. My first attempt was using a cold weld to put a bar accross the bottom with a pin through the center of the he
grate. I know the cold weld won't hold under high heat, its just to try out initially. Then I put a larger collar pin/sleave over that center pin, it acts like a bearing. I feel confident that I'm getting close to a good design. Even by sticking my finger in the center hole and shaking I can see how jamming against the sidewalls is reduced. I messed up and used zinc, it will melt but I can try the concept without a fire for now. My plan was to weld all this in place with iron, that would be great but I'm not sure its even posible to do this with the firepot in the stove. I put some more thought into this and came up with a new but similar plan. welding a bar with a center pin that will span accross and sit on top of the tabs. To take up the difference of space of the remaining tabs pieces of iron will be cut to form a mini c-clamp to be fastened on the other tabs so that the grate can be seated level again. This approach will take away a quarter inch to a half inch of the firepot deapth but I'm okay with that. The nice thing.about this is that it can all be fabricated outside the stove then installed in less than 5 minutes. The bad part is that having a metal shop work with me to do this will cost more than a new firepot. mabe if it all works out great I can have 10 or 20 made and sell them as kits to those who dont want to send their stove out to get fixed. I would pay 200 to have something.that would install in 5 minutes. would others is what im wondering? Pardon the typos,...I'm on a phone not my pc with spellchecker..
GinoF
 
Hand Fed Coal Stove: Chubby
Coal Size/Type: Nut
Stove/Furnace Make: Chubby
Stove/Furnace Model: Bigger of the two Chubbies

Re: Chubby fire grate question.

PostBy: Coal-Chub-E On: Fri Dec 20, 2013 3:26 pm

dcrane wrote:Tcalo is correct about the new firepot allowing the grate to sit slightly below the bottom of the firepot (which has some advantages in terms of it not warping and cracking like that in the future), The ring you have is still available for both the new style firepot as well as the old (its not required on either and you will get varying opinions on whether or not this helps or hurts jambing), The tolerance on that ring is VERY close and I'm not sure having such a close tolerance at the point of the grate is wise (I know it works like a dream when brand new with no hot coal bed in it, but I don't know first hand how long it can keep up that way with the inevitable expansion, contraction, slight warping, etc. in months/years to come). If I was you... Im just buying a new grate to replace your broke one and you can try burning this year with and without your old ring and let us know what works best please...


Here’s an update burning w/out the ring. As you know, I last fall I discovered a badly cracked and disintegrating fire grate. So, I ordered a new one from Larry and was surprised that it was delivered so quickly, two days!! Thanks Larry!!

Lit the stove on December 7, 2013 and had nice continuous burn to December 19, 2013, at which point I let the fire die in anticipation of a forecasted 3 to 4 day stretch of 60 to 70 degree weather!!!!

Without the ring, the stove shakes like it’s almost on ball bearings (so much easier when compared to last year with the warped grate). BUT…..on three different occasions the shaker jammed and as a result was rendered useless. I’m guessing that w/out the ring, smaller coal pieces or compacted ash was getting wedged in between the fire pot and grate. This never happened last season with the ring in. To fix, I had to insert a poker with a hook on the tip into the firepot down thru the coal bed, lift up on the fire grate until the jam was dislodged. Not too safe!!!

As far as ash, there was ash that fell outside the ash pan. But not enough to worry about or cuase any probelms. Every week or so, Id just sccop it out.

The temps are supposed to plummet again next week. I cleaned the stove and re-inserted the ring. I’ll report back in a few weeks with how she runs with the ring in.

Thanks guys!!
Coal-Chub-E
 
Hand Fed Coal Stove: Coal Chubby
Stove/Furnace Make: Chubby Coal Stove

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