That pump is definitely way different than mine but it's item #2 that is probably bad.
Check this site and see if the owners manual is listed. Didn't see anything for an Ultra-Flow. The flat for a wrench on mine is at the rear under the back cover. One manual I looked at on the site below mentioned a screwdriver slot to hold the shaft. See what you can find.
http://www.pentairpool.com/techinfo/...3.php?d=2&s=42
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