Buzzing Hydraulics for main bucket

[kyis]

CT 332 skid steer. Hydraulics for main bucket are very noisy mostly when warm and worst from the ground up to about 3 feet and especially lifting slowly. Rotating bucket is quiet. Whole tractor a little hydro noisy seems like. Help please. Lack of service? Just acquired. About 1400 hours. Fluids full, well at least that big tank in the back. Need to finish job bad, but don't want to ruin anything

 

[kyis]

ran is some more, get it hot enough all the hydraulics get noisy

 

[Tx Jim]

Have you changed hyd filter lately??

 

[jenkinsph]

Have you changed hyd filter lately??

My thoughts too, sounds like the pumps are starved for oil. I would change the hydraulic filter before continuing the job.

 

[kyis]

Thanks!
thought I would change fluid also but have question about type. Will post new. Manual says to use same oil for engine and Hyrdraulics? John Deere Plus-50, which is now Plus-50 II