kuhn mower vibration

[HOLMBYRE]

hi, can anyone help???
I've a kuhn centre pivot trailed mower, it has a bad vibration when you start to cut, its ok when not cutting when you lift it at the ends.... All the pto shafts seem tight, well greased. Any idea?????
thanks

 

[del_boy]

Conditioner out of balance? Missing any fingers/tines?

 

[Mouser]

Conditioner bearings or end of conditioner tube weld let go. They Had problems with welds 7 or 8 years ago.

 

[HOLMBYRE]

Conditioner bearings or end of conditioner tube weld let go. They Had problems with welds 7 or 8 years ago.

I'll have a look,
thanks

 

[wildnwoolly]

hi, can anyone help???
I've a kuhn centre pivot trailed mower, it has a bad vibration when you start to cut, its ok when not cutting when you lift it at the ends.... All the pto shafts seem tight, well greased. Any idea?????
thanks

Check the top and bottom bushes where it pivots in the middle.The top and bottom bolts that hold the main beam to the mower will be worn and have too much play.Very simple job too change

 

[Mur Huwcun]

Can you run without the conditioner to test? Incidentally had a krone few years ago that had a flail missing and another brocken one!! Running it at around 80-90 rpm over the rated speed and it was as quiet as a mouse!!! At 1000rpm you though it was going to bounce off into the sunset!!!

 

[HOLMBYRE]

Check the top and bottom bushes where it pivots in the middle.The top and bottom bolts that hold the main beam to the mower will be worn and have too much play.Very simple job too change

The bolts do have a some play in them, will see if I can get them out to replace or pack them up. Thanks

 

[HOLMBYRE]

only two conditioner fingers half broken, will replace and see if that makes any difference.
Ta

 

[wildnwoolly]

The bolts do have a some play in them, will see if I can get them out to replace or pack them up. Thanks

We tried that put 2 new bushes in and tightened up and was good again.

 

[HOLMBYRE]

We tried that put 2 new bushes in and tightened up and was good again.

is it the bolts that hold the donut pto universal thing at the mower end of the drawbar???

 

[sc4545]

is it a 303?

 

[HOLMBYRE]

is it a 303?

Yes.

 

[sc4545]

I would say the drive from the gearbox is worn causing this vibration

 

[wildnwoolly]

is it the bolts that hold the donut pto universal thing at the mower end of the drawbar???

Yes. Top and bottom bolts hold it on. Ours was vibrating like you say and we tightened the bolts up solid but you could still move the donut pto so we screwed out a bolt and found a bush in there. Replaced them and vibration disappeared.