Thank for your excelent description of this motor, now things get more and more clear for me, regarding the heat on the motor I can hold my hand on it for quite a while I guess its like 55-60 degrees celsius hot (130-140 degrees F) witch I thought was to hot.
I had the motor at a motor company and they had a quick look at it and mesured the cap and said that it was broken, but they didnt bech tested it, hopefully the cap that i bought from them was a better one then the original.
I was thinking about one thing, is it a good idea to amp measure the motor in when its in service, to find out how much power its consuming and compare that with the specification of the pump?