To my surprise I have just had a warranty claim rejected on my straw chopper. The sprocket where the shear pin fits has worn, the shear pin fits in what I presume is a hardened bush with a knurled outer edge which fits into the sprocket. The sprocket had worn so that the hole where the bush fits in had become elongated so in the end the bush would fall out when the shear pin broke. The dealer/manufacturer is now claiming this is a wearing part so not covered by warranty which doesn’t sound right to me, surely the whole point of fitting the bush is so the sprocket doesn’t wear. Any advice on how to proceed would be welcome, my feeling is that the dealer/manufacturer aren’t honouring a genuine warranty claim. Also, has anyone else encountered this problem on their straw chopper, as if it is a wearing part I would expect others to have encountered this problem on older machines.