Hydraulic ?

lti

Member
Have a loader on an IH M. The oil reservior is in the loader frame on one side. The pump is mounted on the frame driven by the fan belt, its off a JD combine used to run the reel and belt pickup on say a 6600.My question is, the output of the oil res. is about 2 foot lower then the pump will the pump be able to suck it up that much higher? Tractor was bought at a consignment sale with loader off so just trying to figure out how this worked if it did. The bucket has two way cylinders and the main lifts are one way. Trying to get it working to sell. thanks .
 
Where is the top of the oil level in relation to the pump? That will determine how hard it is for the pump to pull oil from the tank more than where the port is located.
 
Moresmoke's question is right on. As long as the elevation of the oil in the reservoir is above the pump it doesn't matter where the outlet is at since there will still be positive head pressure at the pump. Even if the pump is higher than the oil level (within reason) the system could still work but it isn't ideal. This situation can cause the pump to start dry after the system has opened up for service or if a leak allows air to enter as the oil drains down back to the reservoir.
 
The pump is about 20 inchs higher then the outlet of the loader tank is.There is no way to get the pump lower the wya it is put together. Other then buy a pump that goes on the pto, then it would be close to almost level maybe pump alittle higher,. 5 to 8 inchs.
 
Oil pumps are usually self priming and positive displacement.
Theoretically you should be able to lift up to 37.7 feet with 9 oil at a .9 specific gravity - assuming the reservoir is vented to atmosphere.
Your limiting factors will be the net positive suction head required (NPSHR) for the pump - which accounts for the losses in the pump and the frictional losses from flow in the suction line.
Not likely a problem if your suction line is at least the size of the pump suction and reasonably short. A smaller dia. line will restrict flow and decrease the net positive head available (NPSHA).

Oil does not have a vapor pressure at normal operating temperatures, so you should not have cavitation in the pump.
 
Back in the day there were a lot of Super M's with crankshaft driven pumps with Farmhand F 10 and F 25 loaders used for piling hay. They seemed to work just fine.
 
No issue. Fill it with Hydraulic oil, put 5 psi of air pressure at the tank fill hole and it will prime and stay primed. Jim
 
If the pump is any good at all it will suck the oil up just fine. I have a hydraulic pump coupled to an electric motor that I use to suck oil out of 55 gallon drums. When I suck out a drum I set the pump on top of the drum, poke the suction tube down in the barrel, plug in the motor and let it go. It takes only a few seconds to prime even when there is only six inches of oil in the bottom.
 

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