power steering pump pulley end float D1 300tdi

Anyone know if end float on power steering pulley is ajustable at all or is it a new pump-mine has a lot of movement in and out,not stripping belts yet and still working-did a search,found a post about a key way that wears,dunno if this is serviceable at home,or as it is not stripping belts,is it a concern?

It it is a new pump, Paddocks have them starting at £48 ex vat. I bought one of theirs for my 300Tdi, and it lasted longer than the original.

There's nothing serviceable in the pump from what I remember.
Cheers!

Thanks for that Graham