Our Used 750a just arrived

Fat hen

Member
Acquired a 6m 6yr old 750a from the continent. Looks in good nick in terms of rust and paintwork, so been looked after. All discs are 38-41cm so have a set of replacements ready for this week.

Most of the rubber depth wheels wiggle like bearings need replacing. I gather that washers can be used to avoid new bearings. Some of the coulters/pipes are v loose others wiggle a bit. Should they be rigid?

The black wheel behind the coulters wiggles as if buckled, how should it be?

What else should I be aware of?

Sorry its probably been covered before....Any tips appreciated :)
 
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Simon Chiles

DD Moderator
Acquired a 6m 6yr old 750a from the continent. Looks in good nick in terms of rust and paintwork, so been looked after. All discs are 38-41cm so have a set of replacements ready for this week.

Most of the rubber depth wheels wiggle like bearings need replacing. I gather that washers can be used to avoid new bearings. Some of the coulters/pipes are v loose others wiggle a bit. Should they be rigid?

The black wheel behind the coulters wiggles as if buckled, how should it be?

What else should I be aware of?

Sorry its probably been covered before....Any tips appreciated :)

I'll guarantee that the bearings in the gauge wheels will be ok, wear is in the rims where they clamp the bearing, as you say a washer will cure it but it needs doing pdq or you'll end up cracking the rims.
I'm not surprised you've got wear in the seed tubes, there is a mod but it hasn't been successful yet.
Is the buckle in the closing wheel? They need replacing anyway with the Guttlers, the original ones are useless.
Check the gauge wheel adjustment is smooth, any stiffness and they need greasing, there are 3 grease nipples on the coulter.
Check the pinch bolt on the bottom of the T handle where it clamps the gauge wheel shaft ( needs tightening a couple of times a season) otherwise you'll get wear between the two and wear in the depth setting slots.
Check seed boots for wear, wear limits are in the manual.
 

Fat hen

Member
Cheers Simon. Setting to work on it tomorrow.

Our local JD dealers concede they no little of the 750a maintenance. I found it rather unsettling to be told this having just purchased a JD drill! Was relying on them to give it the once over.

The dealer says they sell no more than 1 drill per year. The owners usually flog it rather than start replacing parts.
 

parker

Member
Arable Farmer
Location
south staffs
Cheers Simon. Setting to work on it tomorrow.

Our local JD dealers concede they no little of the 750a maintenance. I found it rather unsettling to be told this having just purchased a JD drill! Was relying on them to give it the once over.

The dealer says they sell no more than 1 drill per year. The owners usually flog it rather than start replacing parts.
I would try and get on one of @Simon Chiles operator courses where you will learn all where is to know about the drill, having the drill set right and in good order makes all the difference.
 

Clive

Staff Member
Arable Farmer
Location
Lichfield
I would make a priority of the gutlers personally, they make a big difference


you have a fair bit of wear there to sort, if you use all OEM parts you could be looking at significant spend, when I did my old 4m drill we had a local machine shop make a lot of the pins and bushes we needed at a much lower cost
 

Fat hen

Member
The boots I have measured are around the 28.7cm minimum 'height' as suggested in the manual. Ordered new boot for comparison purposes but think I will replace the lot seeing as the discs and rubber wheel will be off too.
Also gonna replace some of the press wheel bearings. But at 9 quid each rather than the dealer's 19 quid!

Our local JD dealers had zero stock of the boots and said they had never ever previously had to order this part across their group of depots!
 

Simon Chiles

DD Moderator
Also gonna replace some of the press wheel bearings. But at 9 quid each rather than the dealer's 19 quid!

I'd be cautious about cheap bearings in the press wheel, JD have tried various incarnations. They need decent seals to resist the dirt otherwise they only last a short time.

I hate to be the bearer of bad news but that opener looks as though it's been seriously neglected.
 

cows sh#t me to tears

Member
Livestock Farmer
6 years old and looks like that:eek: What did they do, sow the entire european continent with it:scratchhead: Mines just done its 5th season at around 800ac/ year and has no play in either closing or press wheels. Pull the arms off if you can , clean and grease. If they've let it get that bad you can bet it has never seen a grease gun:cautious:. I will guarantee you that the washer and nut on top of the closing wheel arms will be worn as well , which will let the arm move sideways and not close the slot properly as well.
New seed tubes and bolts will take the play out of the tube to the boot. And loosen and rotate the pins 180 degrees in the very top of the opener pivot point on the bar. Tap them in a bit so you can either turn them with multi grips or stillsons. Or if you can wiggle the opener significantly even after that , you may need to replace these pins and bushes too. Good luck.
 

Fat hen

Member
6 years old and looks like that:eek: What did they do, sow the entire european continent with it:scratchhead: Mines just done its 5th season at around 800ac/ year and has no play in either closing or press wheels. Pull the arms off if you can , clean and grease. If they've let it get that bad you can bet it has never seen a grease gun:cautious:. I will guarantee you that the washer and nut on top of the closing wheel arms will be worn as well , which will let the arm move sideways and not close the slot properly as well.
New seed tubes and bolts will take the play out of the tube to the boot. And loosen and rotate the pins 180 degrees in the very top of the opener pivot point on the bar. Tap them in a bit so you can either turn them with multi grips or stillsons. Or if you can wiggle the opener significantly even after that , you may need to replace these pins and bushes too. Good luck.

Well I got it from a dealer in eastern Germany where a big field is not 25ha but 100ha! So you can imagine the size of farm and ha it was doing annually!

So am replacing the boots, replacing the outer part of the gauge wheel, half the press wheel bearings, and of course all the discs.
Guttlers with weights too...
 

cows sh#t me to tears

Member
Livestock Farmer
To be honest that boot looks fine..I would just replace the seed tube and the little locating bolt. ( sometimes you can get lucky and just need to replace the bolt..You asked in your OP should they be rigid...Yes, there should be no play between the tube and boot). Just saying though, by the play in those wheels its obviously had a hard life service wise. I would be checking everything that moves whilst your in the process of refurbishing it. Easier to do then than in the middle of a season.... By the "outer part of the gauge wheel " do you mean the tire?
 
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Fat hen

Member
To be honest that boot looks fine..I would just replace the seed tube and the little locating bolt.
Well I checked the boot measurements versus the manual and it was right on the limit. So may as well seeing as discs & wheel are coming off , I thought

Why the pipe? Surely the seed can find its way down the pipe to the boot
 

cows sh#t me to tears

Member
Livestock Farmer
Its your machine and your doing the maintanence(y) Just thought the boot looked ok. If you think it needs replacing that's fine. But you don't need to take the boot off to do the discs...And it is a pain in the arse to get the spring to locate in the right place whilst trying to put a boot back on(n) So just thought if you could get away without touching them your sanity would remain slightly more in tact;)
 

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