John Deere 456a Bale Tension Problem

[Lars S]

Hi,

Just after some advice on my John Deere 456a conventional baler. It is fitted with the hydraulic bale tension system, but unfortunately the drive chain that drives the hydraulic pump seems very slack and keeps coming off every few bales. I have tried to tension the chain again by adjusting the pump mounting bracket but with no luck. Just wondered if anyone had come across this before?

 

[Chae1]

Just run it off tractor hydraulics. My hesston had a chain driven hydraulic pump too. I did away with it.

 

[FG.]

I run a 456a .
I assume you cant get enough adjustment?.
Maybe you need a new chain, if that's the case or theres a bearing failure on the drive sprocket, that's taking all the adjustment?

 

[yellowbelly]

Converted ours to manual tensioning (don't have it any more for a pic).

Two lengths of 1" threaded bar up the sides and a length of 2"x1" bar across the top.

 

[FG.]

Converted ours to manual tensioning (don't have it any more for a pic).

Two lengths of 1" threaded bar up the sides and a length of 2"x1" bar across the top.

Did you not put any springs in?

 

[Goweresque]

Replace the hydraulic rams with some old springs off a scrapped baler, best thing I did with my 459, hydraulic tensioning on a small baler is an unnecessary complication, just another thing to go wrong at a crucial time.

 

[yellowbelly]

Did you not put any springs in?

It's a long time ago now, but I don't think so.

 

[Deere 6430]

I have a set of the springs and adjusting handles, so all you’d need to convert it to manual if interested.