Versatile 850

Hello. Any Versatile owners out there. I recently purchased an 850 series 2. It had been sitting outside unused for at least 6 years. It is running fine but I have a couple issues. Hydraulics seem to be deadheading. To prevent overheating I use a loop hose on one of the hydraulic outlets. Also there is engine oil getting into the hydraulic system. Loses about 10 litres of engine oil every 3 hours. There is a second hydraulic pump installed on this unit driving off the back of the oil pump. I put a new hydraulic pump on but the issue remains. The tractors seems to have high oil pressure. Runs at a steady 60+ psi all warmed up and working hard. Not sure if this could be an issue. Any help or hints would be appreciated. Thanks

(I have an 850 in my shop right now replacing the steering cylinder seals, but it's older.)

Along with your bypass hose, do you have one of the hydraulic levers tied on the "LIFT" or "lower" position, or is there pressure/flow at that pair of hydraulic couplers all the time?

I don't know where you are or what your tractor did in it's past life, but in the northern plains area and Canada many operated air seeders and were set up to provide a constant flow of oil to operate and ai seeder fan.

If it was set up for running a hydraulic motor one pair of couplers will have a continuous flow of oil, and need to be looped together as you have done, and/or you need to find the adjustable flow divider (if so equipped) that was used to meter the oil flow/control fan speed and move it's control to the "OFF" position.

As to the engine oil getting into the hydraulic system the only way that can happen is through one of the pump seals.

You say you have replaced one of the pumps, perhaps the other has a seal issue.

One other possibility would be if someone has used too much silicone sealant at one of the pump mounting faces and blocked the passage that allows any oil in the mounting area to drain back to the crankcase.

As to the 60+ psi of engine oil pressure that's certainly not excessive for that big 'ol Cummins!

All good comments. Thanks. Yes this tractor ran an air seeder fan in a past life. And yes I need to push the lever ahead or back to start the oil flow in my loop line. I have ordered the service manual on Amazon. I hope it has a hydraulic schematic. I will make everything as per original as I won’t be running a fan. It does have a flow control valve that I will remove. The curious thing is that the previous owner said the hydraulics didn’t heat up for him even after he quit using it to run the fan. Thanks for the tip about a possible plugged drain hole. I shall check it out. I also keep thinking that my two issues are somehow linked. But time will tell. I shall try one thing at a time.

(quoted from post at 11:51:15 10/20/20) All good comments. Thanks. Yes this tractor ran an air seeder fan in a past life. And yes I need to push the lever ahead or back to start the oil flow in my loop line. I have ordered the service manual on Amazon. I hope it has a hydraulic schematic. I will make everything as per original as I won t be running a fan. It does have a flow control valve that I will remove. The curious thing is that the previous owner said the hydraulics didn t heat up for him even after he quit using it to run the fan. Thanks for the tip about a possible plugged drain hole. I shall check it out. I also keep thinking that my two issues are somehow linked. But time will tell. I shall try one thing at a time.

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Does it have 3 or 4 pairs of couplers, likely one IS dedicated to the flow control valve.

Figure out which set of couplers is fed from the adjustable flow control valve and loop them and set the flow control to "zero", then see if the "loading" stops with the other valves in "neutral".