track drive sprockets

[Richard Salter]

dose any one know what the wear tolerance on the drive and rear idler sprockets, we have striped the track of and the links have been hitting the drums and worn quite badly I have thought of welding a ring around the drum wear the links rest and replacing the sprockets but if i do that I will have to replace the whole lot. so would like to know the wear tolerances. Hope this makes sense
Thanks Richard