Rebuilding Bukh DV24 raw water pump, again!

Wrong. Short slot to the impeller end, long slot to the camshaft end (IIRC)

But then the shaft isn't a very tight fit on the impeller pin, it's quite 'loose'. I had it around the other way because I thought it the shaft should be a tight fit....
 
But then the shaft isn't a very tight fit on the impeller pin, it's quite 'loose'. I had it around the other way because I thought it the shaft should be a tight fit....
If fitted the wrong way round the shaft will not seal properly on the 2 seals nor will it locate properly in the bearings resulting in excessive shaft and seal wear - Oh dear - those were the symptoms you had before.......
 
Wrong. Short slot to the impeller end, long slot to the camshaft end (IIRC)

The longer slot is narrower and doesn't fit over the drive pin. And the shorter slot is a very loose fit on the impeller pin.

So must be the other way - long to impeller, short to drive pin.....
 
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