Hi Norm,
The engine will rotate, it's just that at a particular point of the rotation it's slightly more difficult than it was, and it's definitely not compression related. I rotated it by hand before trying to pull the boss off, no issues, standard pressure when rotating (Approx. twice per rotation), but now, during one revolution at a single point, it will seem more difficult to turn. The only thing I can think of is that either the crank pin has moved, or the crank pin has moved and the conrod has been bent. I haven't gotten to the point of disassembling to find out why yet though.
For the boss, there are different versions depending on if you've got a disc with or without reinforcing. If you look at the original 2 blade disc, you'll note that it has wings on the side that turn up a little. I can only assume this is to create some sort of upward force. However, if you look at the 4 blade reinforced disc (CAO9445G), it has no such wings, which is why I went for disc CA09444G. The problem is that without the reinforcing, it's about half the thickness. One way to deal with this is to put a washer between the boss and disc, which I didn't really want to do or to replace the boss with one designed for both self-drive and a non-reinforced disc.
All of that said, I think I may have jumped the gun, because I'm now realising that while the push versions have a boss that's the same size, one for the reinforced disc and one for a non-reinforced disc, the self-propelled may only have a boss designed for a reinforced disc, which means that this may all be for nought :-/ I need to check more part numbers.
I would still like to know how on earth to get these off though. Has anyone had experience removing these without something like an anvil, and in a case where a 2-3 jaw puller has been unsuccessful?
Cheers,
pau13z
