Thanks for the tips, found the speed seal from National Seal (Federal Mogul) Part# 99177 for the OM603.

In looking over the old hub, I also noticed some slight buggering of the hub to crank mount inner surface, 180 deg opposite of the woodruff key slot, so I assume this hub had been changed out before my ownership at least 150k miles ago and the last mechanic also had to force the hub onto the crank, causing this.

I used some emory cloth on the crank stub to polish the slight burrs smooth to keep the hub from binding in this area as it is fitted on.

In reading various posts from people the hub to crankshaft fitment seems all over the place, with many folks saying it slid onto the crank easily, to needing to slightly tap it on, all the way to needing to crank down on the crank bolt to get it to seat properly. So which is it?

Most hubs that I have done in the past (non-MB) fall into the easily slips on to needs some slight tapping, a tight fit, but no need to force it on. Is the OM603 any different?

PS, my hub bolt is marked 10.8 so I need to get a new torque wrench to get it up to the 320NM tightening spec.

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Stable Mates:
1987 300TD 310K mi (Hans)
2008 Jeep Grand Cherokee OM642 165k mi (Benzrokee)