harley wrote:I have a koker 160 new install and the coal bed seems to be thick it is the same height as the sides of the burn grate i thinned it with a poker
and the fire seemed to burn much hotter and brighter should it thin this out and if so could someone please tell me how this is done
The coal bed thickness you are talking about sounds about right. If you look inside the stove at the back end of the coal bed you will see a steel plate that the coal is forced under. This can not be adjusted and the coal will only be as high as the plate allows it to be which at that end of the burn grate is about even with the top of the side rails. I have included a picture of mine that shows the plate fairly clearly.
The reason your coal bed appeared to burn hotter and brighter when you thinned the coal bed out is that you essentially lowered the air resistance of the combustion air blowing up through the thinner bed. With the air "effectively" blowing harder, the coal will burn hotter, BUT you are burning less coal across the grate than what the koker was designed to burn so you really aren't gaining anything.
Also for those having problems with coal feeding in kokers. Based on what my stove dealer told me to do to ensure proper coal feeding. You need to shim the back of the stove so that is is leaning slightly forward, just a smidge beyond level. This causes the stoker bed to tilt slightly downward. If the bed is tilted upward, coal won't feed well. My basement floor is level, so I have the back of my stove shimmed up maybe 1/4". Again, just enough to get the bed tilted downward.