sometimes easy things (at first sight) start to be a big mess: I had ordered two inner oil seals from N&P for the rear wheel hub and got only one...
My experience from the last 30 years was stating: 50% chance to get that huge oil seal in at first try without any trouble...
And - due to Murphy's law - it did not work because the oil seal was stuck half way in and did not move a bit anymore.
So in the end I ruined the oil seal during the attempt to get it in. After taking it out I found out that the hub had inside two damages from a chisel or screw driver. I think someone used a tool like that to get out an oil seal back in time and ruined the surface of the hub that way. The damaged spots stopped then the new replacement part so that it could not slip into the hub. See:
![Image](http://www.steel-toys.com/Div/OS1.jpg)
In addition I found out that the diameter of the replacement oil seal (modern design with rubber lid) was slightly wider than the original leather made oil seal.
So I grinded off the chisel damages and a bit of the hub surface with the Dremel powertool and built a tool to get the oil seals "squeezed in" intact.
Here you can see the difference between the NOS oil seal that you can usually get (with rubber lid) and a BRANDNEW aftermarket oil seal (THANK'S to Skyrookie for the supply with this much better part!
![Thumb Up :thumbup:](./images/smilies/icon_thumup.gif)
![Image](http://www.steel-toys.com/Div/OS2.jpg)
To get it in to the hub I made a small "reverse-pulley" that is squeezing the oil seal into the hub. It consists of a M14 threaded bar, a flat steel bar cut-off and a slice of a round steel with 95 mm diameter. = Stupid & simple. See:
![Image](http://www.steel-toys.com/Div/OS3.jpg)
As you can see on the "anchor side" with the flat steel is there a lot of torque necessary to get the oil seal in - so if you want to copy the tool don't "undersize" it!
So here it is in action:
![Image](http://www.steel-toys.com/Div/OS4.jpg)
In a professional Garage you would use a large press for doing so - but this small & cheap home-made tool is a pretty nice alternative to an expensive professional pressing tool.
- So it took me then only about 3 min. to get the oil seal intact in place.
![Cool 8)](./images/smilies/icon_cool.gif)
Keep 'em Rolling,
Joakim