JD 7000 drive tires sliding

I purchased a JD 7000 6 row narrow earlier this year which ended up being a 4 row wide that was added on to, making it a 6 row narrow. Whoever made it only used 2 of the 4 tires to drive the transmission. So with only 2 tires driving it the planter will sometimes ride on the other 2 tires causing the drive tires to slide. I can let some air pressure out of the other 2 tires, which should help, but should I purchase some high traction (tractor rear) tires to replace the drive tires with? Do you think this would help?
Thanks.

How hard would it be to add the other two drive chains and sprockets? Probably a job....

Using different tires might change your planting ratios, making it harder to figure seeds per acre..... and even with bars, you'd still have the problem of the extra wheels keeping the bar tires from touching.

If you don't have fert weight on the planter, letting air out of the 2 extra might be the simplest option? A 6 row without fert can't be much heavier than a 4 row with fert, so the two wheels should hold up.

Paul

I do use fertilizer. Wouldn't I need 2 more clutches to add two more drive wheels also?

Just put the two over running clutches and dogs on the cross shaft and hook the chains up on the two wheels that are not driving. A four row wide used four wheels to drive to drive.

In no till conditions I have taken the drive tires and loaded them with washer fluid. This makes them heavier.

Also try running your hydraulics in float rather than fully retracting the lift cylinder. If it is a conservation planter your supposed run the SCV in float anyway.

I will try these things. Thank you.

Too much down pressure on row units, holding drive wheels off ground

Been a long time since I used a JD 7000 planter. If it is like my White planter with bearings in the driveshaft that runs all of the units it may just need a good greasing. My planter had set outside for years and rust had developed where the shaft runs in the bearings. I took the time to shift the shafts to one side so that I could clean them. Yours could just have dry grease in it. Those two tires have to turn a lot of shafts and the fertilizer augers.

I have had four JD 7000 4 rows, both regular and conservation till and never had a wheel on one of them slide. The simple reason is all of the weight is on the two wheels. True, heavy duty down pressure springs can take weight off of the wheels, but they always worked together to keep everything turning. I now have two 6 rows, a Deere 7000 and a Kinze 2000. The Deere has 5 additional splitters on back. In no-till soybeans, corn stalks can and have knocked wheel drive chains off. If I would happen to have two drive chains off of the wheel sprocket and on irregular and ridged ground immediately I can see it in the monitor, the actual driving wheels either stop turning or begin to slide. I know right away I am not driving on all wheels. True, I am driving 11 units. The problem is always going exist when the outside wheels ride up on something either slightly or darn near lifting the center drive wheels off of the ground or when the center wheels drop into a dip. Does this planter use one cylinder in the middle and a rock shaft? or, does each wheel have an individual cylinder? The rock shaft style would not allow for as much up and down movement as would individual lift wheels. I do have dry fertilizer on my Kinze and I have stopped the drive shaft on it as well when the fertilizer tubes would get plugged. Planter just stops. Fortunately I think I have only broken one shear bolt. Has to be hard on drive chains. Sounds like it ought to be fixed right by putting in a new or used drive shaft, sprockets on the outside wheels, chains, and the "dogs" that let each wheel spin individually. Less tire pressure and fluid weight might do the job in the short run.