Loud hydro pump in 5254

[Hivoltage98]

I just bought a 5254 with 227 hours on it. I decided to change all the hydro fluid and filters since it needed it at 200 and I'm assuming that it never got changed. I contacted cub cadet and they told me 15-w50 synthetic was a good choice to substitute their fluid. So I did. The pump was a little loud when I bought her but now it's louder.
Once it warms up it quiets down but I want to make sure I'm not missing anything.
Thanks

 

[gtrippleb]

Not sure if these will help or not.

Domestic Series 5000 Compact Tractor Professional Shop Manual
Domestic Series 5000 Compact Tractor Shop Manual

Cub Cadet 5000 Compact Tractor Professional Shop Manual
Cub Cadet 5000 Compact Tractor Shop Manual

 

[Hivoltage98]

Thanks grippleb, I use them for all thier worth