Water Pump Assembly

[schüppe]

Hello everybody,
is there annyboday out there who ever had assemled a new water pump for the speed six ? I have done this and found out, that after fitting in the mechanical seal, it just rotates rather stiff. For my opinion this should be usualy, as the slide rings are getting compressed by the press-in operation, but I'm not 100 % sure about this and I don't want to find out that I was wrong whwn the engine is back in.
So is ther anybody who can tell me about this ?

Thanks in advance

Carsten