Old Hydraulic Pump ?????

[RON58]

Found an old home built wood splitter.Was just playing around with it to see if I could make it work.It was built to run off tractor PTO.Made some brackets and coupled a briggs engine I had to it and get nothing.Cracked all the hoses to see if there was fluid and there was at every connection.The pump if you are looking at the shaft from the end has two shafts,one above the other.I used the bottom one cause thats the one that was used by PTO. So Im turning it clockwise. The top shaft is turning counter clockwise when running. Is it possible that Im on the wrong shaft? The pump I used on the splitter I built is totally different than this beast. Must have came off some kinda machinery. Not desperate or anything. like I said Im just playing around with it.At one time some fella put a lot of work in it.

 

[larman]

mightbe that the briggs isnt turning fast enough to make pressure. do you have a tractor to hook it up to just to see if it does work?or maybe the pump is just junk just rembleing on thowing some thoughts out that might help.maybe even try the other shaft see if that works . is there a presure relife valve on it that is stuck not letting it biuld up pressure is the resure tank have enough oil in it? just some thoughts
larry

 

[Crofter]

Sounds like you will have the opposite rotation then compared to what it would be PTO driven. Some PTO pumps might be too high a volume and designed for lower RPM at greater torque and will snuff your Honda. Hope you can get away with just powering from the other shaft.

 

[KsWoodsMan]

It does sound like the pump is turning the wrong direction to produce pressure.

I wouldn't try to run the pump at 1:1 with the engine. I think PTO RPM is around 540 with the tractor engine running at 1600-1700 RPM. A briggs engine is generally govenored at 3600. A 5-6:1 reduction wouldnt be to far out of line if you are running against the govenor.

 

[larman]

i forgot that a pto does run slower than the rmp of a small moter good thought
larry

 

[Sawmill]

This is just a general question. Your engine should be running in a clockwise direction so wouldn't your pump have to have a counter clockwise direction? Most farm tractors PTO run in a clockwise direction.

 

[kevin j]

when you say pto, meaning farm tractor 540 or 1000, or truck pto off the side of teh transmission? I'd bet it is a transmisssion powered pump. They were built with two shafts just for what you said. Opposite rotation if used on the lieft side or the right side of the transmission, and depends on which brand of transm and truck.

chelsea, gresen, dana, were all connected and common truck parts lines. Now all gone or scattered to new owners.


the gears should rotate in teh direction that carries oil aroound the OUTSIDE of the gears, then the outlet is where the gears come together.
I have a file wtih graphics but can't post it here, or send by pm I don't think. can send it to you maybe. pm me an address.

there is a minimum rpm of maybe 300 to be reasonally effective,

since pto pumps run slow, they tend to be large displacement, so you maynot have enough hp to turn it.

but they are tough and durable and simple.

kcj

 

[RON58]

I talked to the ole guys nephew this AM. Didnt know a lot about it but they did run it with a tractor. He said he remembered a lond square PTO shaft about 8 ft. long. I had to laugh but thats the way they did things then.

 

[Crofter]

Rotation is relative to your point of view. Rotation of a tractor PTO should be CW viewed from the rear. Gas engine rotation is considered looking from engine side toward the output shaft so on the Honda with CW rotation it would turn the pump opposite to what it would have been turned by tractor PTO.

 

[Lloyd H]

rotation

Crofter has it right, easier to think right hand and left hand, most 4 stroke engines are right hand (except chain saws and most weed eaters but of course they are 2 stroke) and 540 PTO's are left hand. I can't say about 1000 RPM PTO on tractors, help me out somebody smarter. Airplane engines look left hand but they are right handed, remember they are mounted with the output shaft to the front. Of course they come right and left for counter rotating twins (right hand engine goes on the left wing and left hand engine goes on the right wing unless its a P38) and european engine are opposite and boats come both ways and and etc etc etc

 

[RON58]

You guys were right. Moved up to the top shaft and it at least worked.The cylinder goes both ways slowly but with no power what so ever. Builds pressure in the tank enough to push fluid out the breather cap. I think I'll look around for a 11 or 16 pump like on a store bought. This far what the heck.

 

[Lloyd H]

pump

The two stage pumps are great on splitters best of both worlds and automatic as well. Good luck with it, and sell the PTO pump on ebay, take the bite out of the 2 stage price. Make sure to size the pump to engine HP

 

[KsWoodsMan]

After running the pump backwards you might have drawn air into the system. If there is very much of it this will take longer to compress and build power. Something isnt right if it is pushing fluid out of the tank. It might just be the tank is over full. Between over full and air displacing fluid it might just come out the breather.
What RPM is the pump running at ? Or how much gear reduction? Pump speed is a function of RPM. Maybe the pump was spec'ed for 2500 RPM or more and getting only 500-600 ? You did say this was something of a farm/home/shop built unit?

 

[Crofter]

No power? Does it stall the engine or just no force on the ram and does not load the engine. If you are blowing oil out the tank vent the pump may be drawing air in through leaking shaft seals. Could be made worse if it is a low speed pump and being over revved by the Honda. If you could post some pictures of the pump or some measurements we might get an idea of its displacement and suitability for the Honda drive. Unlikely but relief valve may be stuck open though that should not cause tank overflow unless it has a design problem.