2021 Kubota U35 Swing Motor Noise

[JonnyTree]

Hello everyone,
I have a brand new (80 hrs) Kubota U35-4 that once up to full operating temperature makes a loud and distinct ticking noise from the swing motor every time you start and stop rotation of the house. The sound is not unlike the sound of a turn signal ticking only much louder. It does not make this sound while the machine is cold and the hotter the machine gets the more sensitive to rotation and louder the sound gets. Attached is a photo of a hydraulic line on the backside of the swing motor that if you hold onto it while the machine is rotating and making that sound you will feel a jump or surge in that line that coincides with the sound. My local Kubota dealer told me that while it is not normal they were unable to identify the cause and are not willing to work on the machine until something is obviously broken. I’m not satisfied with that result and thought that maybe there was somebody out there who has had the same problem and could point me in the right direction. Any help is appreciated and any other information I can offer I am more than willing to do so.

 

[mrmikey]

Sounds as if it's mechanical. I.E. a bad bearing or something in the gear train, possibly even in the motor itself . Probably the reason you feel it in the motor is the little bit of a resistance the bad???? is causing and the pressure spikes a bit. Any way you can operate the swing and use a stethoscope to try and pinpoint the noise? A piece of rubber hose will work in a pinch.
Any way you can remove the motor and run it disconnected? Doing than may give you the option of rotating the cab by hand to see if the noise is in the actual swing section or the motor

My local Kubota dealer told me that while it is not normal they were unable to identify the cause and are not willing to work on the machine until something is obviously broken

Right, when the warranty has expired I bet...........Mike