I've replaced this seal a few times already and if I remember right, there's only one seal. I was just looking through the parts manual and there are 2 listed:

10217886
12553792

The first one looks to be the right one, but then what's the second one??

Thanks.

 

10217886 is the one for the front cover. There is a seal on the back of the water pump that covers the ball bearings at the end of the shaft. I think that is the second part number.