Chainsaw Repair

Anybody know the seal part number other then oem, like a manufacturer of the seal part number?

Me neither.

Here you go if you're going aftermarket. http://www.weedeaterman.com/product_p/o503473701.htm

The polyamide caged bearing is considered superior for high speed use.

Some people's theory was that the plastic cage would cause no harm to the piston/cylinder.

My experience is that when the cage goes, the rod hits in the bottom of the case when the balls all get on one side and metal gets up on top of the piston anyway.

When replacing crank bearings, you DO NOT put the bearings on the crank and pull it into the case! Bearing fitment to the case is an interference fit, to do it without using heat will gall the bearing cups and ruin the case! You heat the case in the oven or with a heat gun and tap the case on a block of wood, the old bearings will drop out. You then reheat the case and drop a new bearing that has been in the freezer overnight into the case.

You then use the crankshaft assembly tool to pull the crank into the clutch side of the case, then install the gasket and pull the crank and clutch side of the case into the flywheel side using the opposite side of the assembly tool. There are two large threaded counter bored bolts each tapped for the clutch and flywheel side of the crank.