You can get new crank berings and seals from a bearing supply shop. I'm guessing they are needle bearings they have a little more ply in them than ball berings. Grab the crank and wiggle it if it moves side to side excessivly they are shot. I don't know if there is a new rod needle bearing still availble. See if you can find any remington parts dealers on the internet. You may need to use gasket paper for new ones if you cant find any precut new. The clutch is most likely threaded on. It will be left hand thread you need to hold the crank still and spin the clutch hub off.