Combines 4w 220 hydraulic IJ

My experience with the hydraulics on those tractors has been that they cannot run 2 functions at once very well. Agco has come with a kit to drive hydraulic drive planters and their blowers using a pto pump and a reservoir mounted on the tongue of the planter. That would be the way I would drive a hyd drive on an older tractor.

I wouldn't give up on hydralic just yet. First if hydralic motor has a screw on it to control speed set it to Max and then slow back down with tractor flow control. This should allow system to run at higher pressure thus it should be affected less by running another function. You see the tractor has lots of flow but not much for a pressure flow compensator built into each valve body. We've run a hydralic motor from each of two remotes and an electric stack with the third all the way back to the 7030s so I think you'll get by. I don't know about Rawson but if you still have trouble with it stalling or slowing to much you should set the low side of compensating valve up so tractor stands by at relief all the time. Thats the setscrew in smaller plug on the piston pump and you just need to screw it in a turn or so and you'll hear pump go up to main relief. Other quick way if you have three point is to adjust upper link rod to cause three point to keep tring to lift even though it is all the way up. Good luck

First of all my MIl went to Iowa once. Crows started bringing back corn they stole 3 years ago.....thought she was a new brand of scarecrow... Anyway the hydraulic problem you are facing is caused by a lOAD CHECK VAlVE slaming shut due to low flow and back pressure. This is a different valve than the 7010 and up. The load check is to prevent the remote seep down of the 70 series. There are two possible cures. 1 is to replace the spring in the load check poppet with a weaker spring. Some times it works sometimes not depending on parameters of flow and pressure. The solution that will work is to remove the load check and drill out the end as in a hollow point bullet to .040 or 3_64ths. You might have to go up to a 1_16th or 5_64ths but no more. This will result in a slow seep down as the 7040's did if the implement is left up over nite. The poppet is not servicable so don't go over . If you wish to go back to origional drive a lead pellet such as a shot shell in the drilled hole. The part number of the poppet is 70264220. NlA

nt