JD A Planting with 7000

A JD 7000 6x30 planter will take every bit of 75 Horsepower to pull if you have any hills at all. You JD "A" is too small in two ways: horse power and hydraulics. The low pressure system on the JD "A" will not lift the planter.
 
I pulled a 4 row 7000 with full granular fertilizer with my 27hp NH 1720. I had to go a gear slower than I liked, but ended up with a very very nice stand of corn. (Only other tractor I had that normally planted died with a bad injector pump....) I was surprised the hp was enough, it was skimpy but it made it.

I now pull a 6 row 7000 granular fertilizer with my 50 hp Ford 5200. A very nice match. On a hill the tractor kinda notices it's back there but not a problem at all.

I have hills. Conventional till.

With the 4 row, I could not use my IHC 300, my Oliver S77, nor my Ford 960. Tho the last 2 have more hp, none of these could lift the planter even in beans with no fertilizer in it. Just simpley not enough hyd pressure, I might have made one round but the oil warmed and that was it, wouldn't lift. I even bought a size bigger hyd cylinder and didn't help.

So I will guess your A might pull a 4 row, not a 6 row, but it won't lift either one so just won't work?

Paul
 
I never had a 7000,so I'd have to defer to the guys who say you don't have enough hydraulics. I remember back in the 60s though,the first no til planter around here. It was a 4 row Allis Chalmers. I can remember pictures in the paper of him pulling that was a John Deere A.
 
There is the regular 7000 4 or 6 row that has one lift cylinde middle of the planter that rocks the wheels down. They didn't lift with my old tractors that I mentioned below.

There is a more rare 'conservation' type 7000 that has a lift cylinder at each wheel. It has a bigger frame tube I believe. Perhaps this one lifts easier with multiple cylinders? I don't know.

Just thought about this.

Paul
 
Those AC 333 No Til Specials are a plumber's nightmare. To look at them,they look like the lift cylinders are two way and the oil from the tractor goes to both. It actually lifts with just one cylinder and the oil in the top of the left one is pushed out to the slightly smaller right cylinder and that's what lifts that cylinder. You only use the down pressure for the marker cylinders. That could make the ACs easier to lift I suppose.
 
John Deere 7000 6 row conservation planters were extremely rare around here. You are right with more piston area lifting nearly the same weight a low pressure system would stand a better chance of lifting. At the same time the more volume to filled at one rate of flow means a longer amount of time to raise the planter if not a master/slave system which I do not think they are unlike Randy's setup. Still it's a marginal proposition to use an A for such a job. An area farmer used an early JD 3020 PowerShift and its not like it just played with the planter especially on the hills. Oh well, we all have to try something different from time to time.
 
Whenever multiple cylinders are used to lift the same thing chances are it is a master/slave setup unless a mechanism is physically tying the cylinder's movements together. If the lift cylinders weren't master/slave and were plumbed in parallel the oil would always go to the path of least resistance and if the planter wasn't perfectly balanced one side would raise before the other. Also, if raised only halfway up the planter would rock from side to side as oil passed from one cylinder to the other.

Another point to consider is that with a master/slave arrangement you get no benefit from the increased piston area since the tractor pressure only "sees" the base end of the master cylinder. A master and slave cylinder pair together will lift no more at a given pressure than the master cylinder would by itself with the rod side plumbed to tank.
 

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