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using a sprayer with a Hydraulic pump on an old tractor

P

picassomcp

Member
I have got a sprayer that I'd like to use with my older Farmall tractors. This sprayer has a hydraulic driven pump that just hooks to the remotes on the tractor. I'm wondering if it would hurt anything to hold the hydraulic lever of the tractor up by hand for the amount of time needed to spray a field. Also, I tried holding the hydraulic lever up to run the pump for just a minute or so, but found it hard to keep the sprayer pressure from moving up or down. The more I moved the hydraulic handle, the more the pressure changed. Is there a way to regulate this to keep my pressure steady?

Tractors I have available to use on the sprayer

Farmall 460
Farmall 756
Case IH Maxxum 5220

Thanks for any help or ideas!
 
Do you have any literature on what flow the hydraulic motor requires to operate the pressure you need. When you move the handle on the valve you are changing the amount of oil (flow which equals speed) going to the motor. The 2 IH tractors have an open center system, the 5220 does not.
 
Could you make a linkage with a turnbuckle so that you could micro-adjust the valve handle? Not sure how that would work for continuous work, the oil might get hot. It might be better to run the pump full speed and run some of the spray chemical back into the tank, that's what I did with an electric spray pump.
 
It would depend on two things: 1) If your system is open center or closed center on the hydraulics. 2) The rated flow of the hydraulics at the SCV valve.

Your IH 460 and 756 are both open center systems and are not high flow systems. The CIH 5220 is a closed center system. So you would need the plumbing to be different for that CIH 5220. Also you need to regulate the flow to the hydraulic motor running the spray pump. On most hydraulic driven spray pumps there is an adjustment in the area of the inlet port that allows you to control the flow going to the motor and bypasses the extra. I know on Ace hydraulic pumps it is a slotted bolt with a jam nut that you adjust out for less pump speed/flow and in for more. Other brands have it but I have not used them so I can't tell you right of the top of my head how to set them.
 
You have to be careful moving the hyd lever while running a high speed hyd motor. When you shut valve can blow seals and even twist motor shaft. Always tie handle and shut off tractor before centering valve. You might have already screwed it up! 756 should be fine, lots of oil and hyd cooler also.
 
Your Maxxum has exactly what you need built into the service valve. the lever can be locked back and you can turn the knob on the service valve to regulate the oil flow. The hyd system is a pressure/flow compensated system, not a true closed center system like on JD tractors. Read your operators manual for details.
Loren, the Acg.
 
You can spray with an older tractor without a cooler but you probably don't want to do it for a long time or the oil will overheat. Building enough sprayer volume and keeping it steady might be a problem because of the low gallons per minute the old pumps put out. As Vis S said, stopping the oil flow suddenly is not good for the hyd motor. If your tractor has a float position run the pressure to the hyd motor on the downstroke side of the hydraulic lever, usually the forward position and then slip the hydraulic lever into float to stop the hyd motor. If you are spraying all day with an open center system you might get hot oil even with a cooler. If your open center tractor has a cooler make sure the cooler and radiator are spotlessly clean to obtain maximum air flow. Your engine radiator has to be clean too or it will slow down airflow through the oil cooler if it is in front of the radiator. I spray with my 1086 with open center system with a hydraulically driven pump all day long but I keep the cooler and rad very clean. The hydraulic oil still runs a little on the 'warmer than I would like to see' it side.
 
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