Hydro whine: 600 hr thoughts

[HomeBrew2]

Did my 600 hr service today.
(My BX23 is supposed to get the hydro oil and filt changed ea 300 hr.)
For the last, maybe 50-100 hrs I've been thinking the hydro seemed to be whining louder than I thought I remembered it did when new. I poo poo'd that thought.
Imediately after the service, I noticed a marked reduction in the hydro whine ... close to night and day ... maybe, dusk to high noon.
Not sure what to think. I didn't notice any diff at the 300 hr service. But, I did work her a lot harder the 2nd 300. No appreciable chips in the sump screen ... ever. I might feel a little more power to the wheels. Pretty subtle if true. Dunno.
Maybe I'll change the filter at 150 hrs. next time. Maybe do the whole shebang at 200 hrs. ...
Cheers!

 

[DiskDoctr]

Maybe was a little low on fluid. You would have topped it off when you refilled.

Similar to power steering whine when low in a car...

-JC

 

[DiskDoctr]

Maybe was a little low on fluid. You would have topped it off when you refilled.

Similar to power steering whine when low in a car...

-JC

 

[JimMorrissey]

Brew...I noticed a reasonable reduction when I went from UDT to SUDT. Did you happen to change oils (specs/brand)?

 

[JimMorrissey]

Brew...I noticed a reasonable reduction when I went from UDT to SUDT. Did you happen to change oils (specs/brand)?

 

[HomeBrew2]

DD, You have a point, though I'm pretty sure I checked it when I found the whine to be more noisy. Also, I usually got jerky feedback in the steering wheel when PS fluid low in car.

Jim, no change in oil ... Kubota SUDT.

 

[HomeBrew2]

DD, You have a point, though I'm pretty sure I checked it when I found the whine to be more noisy. Also, I usually got jerky feedback in the steering wheel when PS fluid low in car.

Jim, no change in oil ... Kubota SUDT.

 

[neverenough]

Most likely the filter was starting to get plugged. Not uncommon to have the filter start to plug up prior to the recommended service interval.

 

[neverenough]

Most likely the filter was starting to get plugged. Not uncommon to have the filter start to plug up prior to the recommended service interval.

 

[HomeBrew2]

Thanks for confirming one of my thoughts. Sounds like you have experience with this. Would you recommend changing filters at the 1/2 way mark of fluid change?

Cheers!