630 rhythmic growl

[edinmo]

I recently bought a 630 that runs well with no visible oil leaks. Changed the 1st reduction gear oil. No shavings and the oil quantity was perfect. The hydraulic system, transmission, pto, and 1st reduction all have correct oil levels. So I don't think any internal seals or engine maiin seals are leaking. But I do notice a growl that has a definite rhythm to it. Seems to be on the clutch side with the clutch engaged or disengaged. Any ideas what might be causing it.

 

[JD Dave]

It could be a bad bearing in the drive train or a gear missing a tooth. Might help us if you can post a video with sound.

 

[ET]

If you disengage the pto drive gears, does it go away.

 

[edinmo]

Doesn't go away when the PTO is disengaged. It's there when in neutral with clutch engaged or disengaged. I'll work on posting a video.

 

[JIM MN]

So, there is a growl any time the tractor is sitting, running?

 

[edinmo]

Yes, that rhythmic growl is always there.