Yesterday I made a trip up to Port Carbon PA to visit my Aunt. On the way, I stopped at Mark's Supply in Shenandoah. I picked up some new grates, spare side rails, a new style coupler and a couple ash tubs. Joe's advise on grates is that you should replace them when they warp, don't wait until they brake. After comparing the new ones to the grates I used last season I noticed that, one grate was not very warpped at all, another was a bit warpped and the third one is deffinatly warpped.
The new style coupler has a set screw that goes strait onto the shaft of the motor. This means the ears on the blower that engaged the old style coupler need to be removed or bent over and flattened to make room on the motor shaft.
While I was at Mark's Supply some of the old heating contractors where there getting parts. While talking to one of them, he said at one point he had a Yellow Flame 4 grate boiler. He also said it was the biggest "Coal Hog" he ever saw, "went through 2.5 ton a month!". I was considering finding a boiler to put my 4 grate stoker into, but after hearing that, I guess I will just refurb my newer 3 grate stoker for the coming winter.
Back to my Aunt. I didn't know this before but walking around down at the corner of her yard I found a BIG chunk of COAL! My Aunt said one of the neighbors was a coal miner (decads ago) and he brought it home with him one day.
It's about 4 feet or so long, about 2 feet wide and maybe 3 feet high. Something like half a ton or so.
That's a nice sized coal rock!