LB 85 plough struggling to turnover

[DrWazzock]

Seems to need full revs to get my plough to turnover. Goes over alright one way, but the other way the turnover ram seems to get stuck midway at the changeover point. The plough then opens up which isn’t helpful.
Anything obvious or just generally knackered. The 4 bolts holding the arm and end plate on the turnover shaft were loose. I tightened these up. Shaft well greased etc. Ram joints not that slack.

 

[Lowland1]

Seems to need full revs to get my plough to turnover. Goes over alright one way, but the other way the turnover ram seems to get stuck midway at the changeover point. The plough then opens up which isn’t helpful.
Anything obvious or just generally knackered. The 4 bolts holding the arm and end plate on the turnover shaft were loose. I tightened these up. Shaft well greased etc. Ram joints not that slack.

Is it the valve box thing. I had the same problem and borrowed a valve from a neighbour and it worked so had to buy a new one.

 

[dannewhouse]

Is tractor lifting it fine on linkage on tick over? Just checking it's not tractor pump going weak.
Otherwise I'd point at the valve aswell

 

[DrWazzock]

It could be.
As I could detect some slight movement I have retightened the bolts holding the turnover arm plate onto the front end of the shaft and this time used loctite and the air impact wrench.
Hoping this sorts it out but if not then might be expensive valve.
Tractor oil seems alright but maybe a dud quick release fitting is slowing flow. Doesn’t seem to whip it over fast enough to carry itself over centre.

 

[DrWazzock]

No improvement after tightening bolts and swapping spools over.
Present work around is to close the plough up manually using the spook valve before turning it over. This way it doesn’t start opening up again when half way over.
To me it looks like the valve within the control block that switches to open the plough up on detecting turnover ram fully retracted has a weak or incorrectly adjusted spring but it’s a new plough and system to me.

 

[KB6930]

There's a screw on the box for setting the pressure have a fiddle with that but just remember where you started from so you can put it back if necessary.

Have you got a free flow return? If you have try the return pipe into that out of curiosity someone I came across once ran they're plough like that and it worked well but I can't remember why he did it

 

[MF-ANDY]

Try new q/r ends on the pipes.

 

[dannewhouse]

Does the tractor tip a loaded trailer at a sensible pace etc? If it doesn't "whip" the plough over you sound to be fighting a supply volume problem, could be bad ends/poor return etc or poor supply from tractor is pump tired especially if it gets worse as tractor gets hotter during Day

 

[DrWazzock]

Now even with the plough set closed right up, it struggles to get it over centre.
Wondering if the turnover shaft bearing is seizing. You would think it would have enough momentum to carry it over. It’s almost as if the turnover ram retracts too early and pulls it back before it’s got over centre. There an is eccentric anchor at the other end of the ram. maybe it needs looking at. Can the turnover ram reach full extension before the plough is going over centre if the eccentric anchor is wrongly adjusted or if there is wear in the ram end joints?

 

[Matthew Britton]

In my limited experience of those ploughs, it sounds like the valve block.