750a mods

[Clive]

Get a lot of play in the jaw that grips the square end which leads to reduction in seed depth accuracy over time

On our old drill we machined the jaws and shimmed the forks, Current drill is going to need the same doing before this autumn I think - it’s not a small job !

JD really let themselves down with various aspects of the drills engineering, a few more bushes and shims from new would make it a million times better to run

 

[Simon Chiles]

Lots of my are quite seized, drill only 3 seasons old. Wondering if I’m over greasing

What grease are you using? Technically you should use polyurea, it’s what they use at the factory. The problem is that polyurea and lithium greases don’t mix and can go into a hard paste which may be causing your problem.

It also helps if you move the depth adjustment at the same time as greasing.

 

[Simon Chiles]

Get a lot of play in the jaw that grips the square end which leads to reduction in seed depth accuracy over time

On our old drill we machined the jaws and shimmed the forks, Current drill is going to need the same doing before this autumn I think - it’s not a small job !

JD really let themselves down with various aspects of the drills engineering, a few more bushes and shims from new would make it a million times better to run

If you’ve got wear between the gauge wheel shaft and the adjustment fork already you haven’t been tightening the clamping bolt up enough, I tell everyone to keep it tight but might be guilty of not stressing enough that it really needs to be super tight. If you’re lucky you might find that by murdering them up you might remove the play. If you’re doing big acreages I’d be tightening them once per week.

 

[Clive]

If you’ve got wear between the gauge wheel shaft and the adjustment fork already you haven’t been tightening the clamping bolt up enough, I tell everyone to keep it tight but might be guilty of not stressing enough that it really needs to be super tight. If you’re lucky you might find that by murdering them up you might remove the play. If you’re doing big acreages I’d be tightening them once per week.

its tightened very regaulary - your old drill had loads of wear in those forks which is why we machined and shimmed them after our first autumn with it, the wear leads to a lot less accuracy in seed depth

its a bad design - a 50p shim would sort it if JD could just have been bothered, just like a few more bushes wouldn't have gone a miss on the opener, its a great drill bit spoilt by some lazy (cost cutting probably) engineering in areas like that

 

[Fish]

Tackling this job today. After around 3500 acres the 3/8 boot retaining bolt has lost about 1mm allowing the boot to slop about, so I'm replacing it with a 12mm to take the slop out.

 

[Simon Chiles]

its tightened very regaulary - your old drill had loads of wear in those forks which is why we machined and shimmed them after our first autumn with it, the wear leads to a lot less accuracy in seed depth

its a bad design - a 50p shim would sort it if JD could just have been bothered, just like a few more bushes wouldn't have gone a miss on the opener, its a great drill bit spoilt by some lazy (cost cutting probably) engineering in areas like that

That drill was still on the originals when you bought it, as it had long stopped counting at 9999.99ha I reckon it had done 30,000+ acres and you clocked another 2500 so I don’t think they had lasted too bad. I suspect JD designers would think that was more than acceptable.

 

[Will Blackburn]

How do you find the total ha meter on the isobus drills?

 

[SilliamWhale]

View attachment 757032 View attachment 757030 Tackling this job today. After around 3500 acres the 3/8 boot retaining bolt has lost about 1mm allowing the boot to slop about, so I'm replacing it with a 12mm to take the slop out.

What drill bit you using?

 

[Fish]

What drill bit you using?

No need to drill, the 12mm bolt goes straight in, it's just a bit larger that the original 3/8, which to be fair, is sloppy from the get go.
As recommended by Matt Hagay in the vid put up by York in the John Deere 750a thread.
I've used a 8.8 grade bolt, could have used a 10 or even a 12 bolt, but I want the bolt to ware, not the drill if possible.

 

[Clive]

That drill was still on the originals when you bought it, as it had long stopped counting at 9999.99ha I reckon it had done 30,000+ acres and you clocked another 2500 so I don’t think they had lasted too bad. I suspect JD designers would think that was more than acceptable.

without doubt it had done plenty but to have a few more bushes or shims on cast parts would not cost much more at production surely and make the drills a lot better and easier to take wear out of

 

[Farmer.sa]

We had David Purdy come out about a boot problem we are having, we also have problems with the shaft seizing up he recommends JD high load grease it’s not cheap but won’t break the bank having a couple of cartridges for that job.
We are also currently fitting the new pro series boot to our drill so will be interesting to see how good it is

 

[H.Jackson]

Have been using the polyurea grease only problem is were the two grease types have mixed, first outside three coulters stopped taking grease the rest are fine, will pump out the old grease when changing next time.

 

[SilliamWhale]

Where was the website for the guage wheel shim washers again? I'm sure it was on a thread last week? Can't find it anywhere!

 

[Clive]

Where was the website for the guage wheel shim washers again? I'm sure it was on a thread last week? Can't find it anywhere!

We made them Will and had forks machined locally - not sure anyone sells them ?

 

[Simon Chiles]

Where was the website for the guage wheel shim washers again? I'm sure it was on a thread last week? Can't find it anywhere!

https://thefarmingforum.co.uk/index.php?threads/750a-packing-washers.266778/

 

[Tractor Boy]

Finally got these row cleaners on. Took some scheming and some professional fabricating.

 

[Clive]

Finally got these row cleaners on. Took some scheming and some professional fabricating. View attachment 768792 View attachment 768794

looks a good job - they have certainly helped here when in hi trash situations like wheat after oats and OSR after wheat (where we don't use the tine drill)

not got the bars on our drill though as you know, still cant understand why we don't seem to need them but yours does

 

[Robert]

Finally got these row cleaners on. Took some scheming and some professional fabricating. View attachment 768792 View attachment 768794

Proper job. Please let us know how they perform.

 

[all_arable]

Makes it look even tighter under the the drill than it did before and that's not overly generous!

 

[Fish]

^^^ I was thinking the same, greasing the front centre openers is going to be an interesting experience.