John Deere 750a

Discussion in 'Direct Drilling Machinery' started by Robh, May 2, 2018.

  1. Robh

    Robh Member

    I’m after a bit off info. Can anybody explain to me the difference through the ages of the 750a in the drill mechanism please. Maybe pics as well! Thanks in advance.
     
  2. Clive

    Clive Staff Member

    Location:
    Lichfield
    @Simon Chiles is the guru of 750a history and model changes
     
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  3. The 750a shouldn't have many radical changes. Its based on a 1560 USA drill more than a USA 750
     
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  4. Robh

    Robh Member

    Is there anything that is worth seeking out on them that would come with a later drill?
     
  5. Less wear and maybe electrical accuracy? Also single piece boot is considered superior to two pieceI've old old proper Yank 750 and the seeding job is probably as good as a modern one.

    Have you two in mind? Link them if you do and want an opinion
     
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  6. Simon Chiles

    Simon Chiles DD Moderator

    It’s a good job it’s raining down here.
    Basically the 750 came with 3 different types of openers, the 50 series didn’t have as many settings for seeding depth. They also were really best suited to direct drilling and had a one piece seed boot. They were normally fitted with gauge wheels that had a yellow centre.
    The 60 series opener had a free float on the pressure spring which made it capable of drilling equally well into a cultivated seedbed as well as direct. The early 60 series openers didn’t have grease able shafts for the gauge wheel/ tee boot arm in European spec but they should have sorted under a PIP. They also had wider press wheels and two piece boots. Both of these can be changed to upgrade the opener to a 90 series. The 90 series seed boot is again one piece, as it sits further back in the shadow of the disc it wears slower and also doesn’t force the seed slot open as wide making it easier to close. As said earlier the later v shape press wheels are also worth having for the same reason.
    Drill frames pre 2002 were prone to cracking and have been beefed up again since ( worse on 4 and 6 m drills). Later 3m drills had the wheel brakes and 4 wheels at the back and larger 1800 litre hopper.
    There have been at least 4 versions of the isobus drills. The first was by far the best, it had an LH Agro job computer and normally had a GSD4 ( brown box) display. The earlier KV software normally didn’t give problems either but later ( the last year or so) have had problems burning pcb’s out, however these are normally sorted under warranty ( new design board and a software upgrade). You can help yourself protect your later iso drills by knocking out the agitator pins and fitting the new blue flap for the seeding mechanism, part no A111286 when seeding at high seed rates and always when seeding peas, beans and lupins.
     
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  7. Robh

    Robh Member

    There’s the one at Ellis Machinery been there a while so maybe to dear or perhaps there’s something I’m missing??
    And also been offered the “5m” one that was from Germany a couple of years ago! Perhaps someone could enlighten me on that one.
     
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  8. That one at Ellis isn't a bad price but it will probably need spending on it. Once you've got it right it will be perfect but with discs, boots, guttlers, bushes for arms etc. it could be an extra £10k.

    You could refrub it in the States for half that.
     
  9. Clive

    Clive Staff Member

    Location:
    Lichfield
    I’ve seen the one at Ellis and it’s not bad but needs some wear taking out which can cost
     
  10. Robh

    Robh Member

    Where would you guesstimate that cost to get ware out Clive?
    What series running gear is on that drill? What would you see as a must have mod on running gear?
     
  11. Robh

    Robh Member

  12. Clive

    Clive Staff Member

    Location:
    Lichfield
    I didn’t look in detail as was not there to look at the drill specifically

    Without detailed inspection it really is impossible to say how much you might need to spend to make it perfect wear wise but be warned on a 750a things can get expensive when pins / bushes need replacing

    From memory it was on 60 series coulter but it was 9 months ago I looked so memory is shady !!

    Overall it looked a good drill as long as buyer was aware of wear and what it could cost


    The German one on big tyres had been for sale for ages (at least 5 years) its in early coulters and I was told the story behind it a long time ago but have long forgotten it !
     
  13. Robh

    Robh Member

    Thanks Clive eyes open then!
    German one has come up locally to me so may have a look.
     
  14. Tristan Ellis

    Tristan Ellis Member

    Location:
    Warwickshire
    Hello all,

    Regarding our John Deere 750a 4m @Ellis Machinery :

    It is a 2004. It came in from Europe.

    Disc diameter is about 420mm on average across all the coulters.
    The coulter boots are better than some that I have seen on these older drills. I would say that the majority of them are fine.
    The depth gauge wheels are generally OK - it depends on how far you want to go - they are all arguably serviceable. Some are wobbly, but I believe that if you shim them up you can eliminate the wobble - as the wobble is rarely to do with the bearings.
    It has the steel wheel rear press wheels.
    Metering wheel - not radar.
    I would say half of the small rubber press wheels and their bearings that run immediately behind the disc are in need of being replaced soon - but again, they would go to work tomorrow...it depends on how you see it.
    It has the LH Agro Isobus with the brown control box (reading 7087ha total work done from memory) - this has had a new wiring loom fitted by our local JD dealer, they have also recently gone through the drill with ourselves to make sure it is all operationally sound earlier this year. Calibration works.
    The most wear is in the pins and bushes throughout the coulters - this is where parts bills could go up.
    Also, some of the seed hoses are bound up with tape - so still serviceable, but looks a bit shabby!
    That's all I can think of at the moment, hope it helps. Any questions feel free to give me a shout.
    Price - it could go at £22000 ex yard.

    Regards,
    Tristan
    07876 876 926
     
  15. I have a 12 month old 3 metre as in as new condition.
     
  16. Tractor Boy

    Tractor Boy Member

    Location:
    Suffolk
    Depending on whether the 5m one has had work done on it in the last 3 years would be a warning whether to touch it or not!
    I looked at it about 2 1/2 years ago near Peterborough and it wasn’t looked after. Seed was growing in it, firming wheels bent up, seed boot springs missing, didn’t look greased and the list went on. I bought a new one!
     
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  17. Dave645

    Dave645 Member

  18. Big-Al

    Big-Al Member

    Location:
    Rugby Warwickshire
    This is the best way to grease it i find but you get a good idea of the workings of a 2016 750A.......... did this tonight at 5.30pm 1st June 18 after drilling some pheasant cover luckly i dont think any damage as i was stopped folding up and the drilll was empty on a slight slope..bugger IMG_3922.JPG
     
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  19. Simon Chiles

    Simon Chiles DD Moderator

    It looks as though the boots are worn.
    Seriously though there’s something not quite right about your story. 5.30pm? On a Friday night? I thought normally by then you’d be having a shower and getting changed ready for the pub! Not like you to be doing overtime.
     
  20. Badshot

    Badshot Member

    Location:
    Kent
    I think that 5m drill might be in a dealer local to me now.
    Might be a tiddly bit more than £22k now though :eek:
     

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