John Deere 4400 hydrostat charge pump

[WVAhills]

I have a John Deere 4400 compact tractor hydro and the charge pump on the hydro transmission is bad,is there anywhere these can be purchased other than John Deere or where can I get one rebuilt ?

Thank you

 

[dfkrug]

The charge pump for the HST is the power steering pump on the
left front side of the engine. If it is bad, then it may be rebuildable
if not damaged. Have you measured your charge pressure? Have
you opened up the gear pump to see if it is bad?

I don't know where you can buy a new pump except from JD. A good
hyd shop should be able to replace seals, if that's the only problem
it has.