Stator/Mag Ring Puller

When you need a Rotax speciality tool the Rotax service centers rent them out. Just give the a call and ask.

Thanks Roger,

I tried to buy one at Lockwood; M46x20, but not "in-stock". Actually thru some searching on this site I noted Don said puller is M46x1.5 with a question mark, so 20 designation seems dubious.

I'm here in Philippines and sent an email to Rotax Rep that has PI in its territory. No reply for a week. Trying to rent one from states might be problematic, but thanks for rental suggestion.

Today I ordered a M50x1.5 mag puller from Amazon. Local machine shop figures they can insert brass welding rods and thread onto flywheel hub...hmmmm. Liked your mushroom insert tip about grinding bolt.

TKS,

Robert

The puller stated in the 912/914 MMH is part number 887375, which is now replaced by the 877379.  This is the same puller that is used to remove the sprag clutch housing on the 912iS engine.  I have one and I will measure the thread diameter and post it a bit later today.  Also, the crankshaft protection piece is critical, and is sold as a separate part from the puller. The protection piece (mushroom) is a hardened steel disk about 11mm thick that is shaped to sit captive on the end of the crankshaft.  You apply grease to the side that sits against the crankshaft, and it works as a thrust bearing.  

a few answers, first to Don about the description.  The M46 is diameter and 20mm is thread length.  When described as an M46 X1.5 the 1.5 is the metric thread pitch and not related to the length.  

For all who will put a crankshaft protector on the crank end it is important to use some grease on the contact area only, never on the threads, this holds it in place against falling off inside the puller while you run it in.  I always use a bit of grease on the contact between the bolt head and protector face to allow for a smooth turning of the metal to metal parts.  

Do not get an grease on the threads as they are supposed to be dry when you assemble them for the correct torque values.  

We should all be aware that you are removing a part that is attached to a taper.  As such these parts will have a very high contact strength and the use of a correct puller is important.  Always be sure that the puller is fully threaded down to the flywheel to avoid stripping of the tool. 

Cheers

RW is correct.  I measured mine and the hub thread is 46x1.5 with 20mm thread length.