Log splitter running hot

[TheOldHokie]

Used the splitter all day yesterday, must have been above 30 Celsius outside and the oil reached 220F. Cylinder started leaking at the rod more and pump sounds like it cavitates once oil is warm. Pump is quite when oil is cold, pump is quite when valve is in action in either direction once warmed up. Still no pressure gauge. Engine is throttled down to almost an idle. Oil still looks like it did even after hitting 220F

Way too hot. You need to get more info on thst pump. Do a simple flow meaurenent:

1. Get a clean 5 gallon bucket and mark the 3G level on the side.
2. Disconnect the hose on the base end of the cylinder and put the hose in the bucket
3. Start the engine and set it to idle.
4. Move the lever to max extend and time (seconds) how long it takes to fill the bucket to the 3G mark.

Now calculate GPM @ idle RPM

GPM = 180/seconds

TOH

 

[Ray,IN]

Is the bypass valve working? When the direction valve is in neutral the oil must have a bypass back to the reservior or the pump and oil overheat.

 

[TheOldHokie]

Is the bypass valve working? When the direction valve is in neutral the oil must have a bypass back to the reservior or the pump and oil overheat.

Its an OPEN center valve!!!! Tank is ALWAYS open to reservoir and is the path oil takes when in neutral.

TOH

 

[farmersamm]

I guess where I get confused about open center hydralics is..............

My Oliver exhibits the same "problem" that most Oliver owners experience. It's a reportedly open center system, but the remotes are always under pressure. Makes it a booger to hook up implements, unless you do what I did......add a shutoff valve immediately in front of the coupler on the tractor.

So............if everything is under pressure at all times, the system has to have pressure relief(bypass) to keep the pressure constant. Consequently, the hydraulic unit on top of the tranny will get so hot that you can burn your leg on it if not careful.

The Allis will not do this. You can relieve pressure on the couplers simply by shutting off the engine, and working the levers. NOT SO WITH THE OLIVER...........IT RETAINS PRESSURE EVEN WHEN ENGINE IS SHUT DOWN. On the Allis, IIRC, you can relieve pressure on the couplers with the engine running, by simply depressing the ball check valve in the coupler, but don't quote me on that........it's been a dog's age since I hooked anything to those remotes.

 

[TheOldHokie]

I guess where I get confused about open center hydralics is..............

My Oliver exhibits the same "problem" that most Oliver owners experience. It's a reportedly open center system, but the remotes are always under pressure. Makes it a booger to hook up implements, unless you do what I did......add a shutoff valve immediately in front of the coupler on the tractor.

So............if everything is under pressure at all times, the system has to have pressure relief(bypass) to keep the pressure constant. Consequently, the hydraulic unit on top of the tranny will get so hot that you can burn your leg on it if not careful.

The Allis will not do this. You can relieve pressure on the couplers simply by shutting off the engine, and working the levers. NOT SO WITH THE OLIVER...........IT RETAINS PRESSURE EVEN WHEN ENGINE IS SHUT DOWN. On the Allis, IIRC, you can relieve pressure on the couplers with the engine running, by simply depressing the ball check valve in the coupler, but don't quote me on that........it's been a dog's age since I hooked anything to those remotes.

I dont know anything about what ALLIS may have done but you are terribly confused about open center hydrsulics.. If its open center and the valves are in neutral the only thing under pressure is the remote work circuit. That circuit is separate from the neutral circuit. The neutral circuit is open to tank and at ZERO pressure.

TOH

 

[farmersamm]

I dont know anything about your ALLIS probkem but you are terribly confused about open center hydrsulics.. If its open center and the valves are in neutral the only thing under pressure is the remote work circuit. That circuit is separate from the neutral circuit. The neutral circuit is open to tank and at ZERO pressure.

TOH

Hydraulics always confuses me

 

[TheOldHokie]

Hydraulics always confuses meView attachment 125062

It confuses most people

 

[farmersamm]

It confuses most people

These people too.....................

https://forums.yesterdaystractors.com/threads/oliver-1850-remotes.1043423/

 

[TheOldHokie]

These people too.....................

https://forums.yesterdaystractors.com/threads/oliver-1850-remotes.1043423/

Its a common problem on all hydraulic systems. When the control valves (open or closed center ) are in neutral the outlets are not connected to pressure. The outlets develop residual pressure from things like heat from the sun or thermal conduction.frim surroundung components. As described in that thread outlets equipped with pilot operated check valves to prevent cylinder drift are particularly troublesome.

TOH

 

[Ray,IN]

Its a common problem on all hydraulic systems. When the control valves (open or closed center ) are in neutral the outlets are not connected to pressure. The outlets develop residual pressure from things like heat from the sun or thermal conduction.frim surroundung components. As described in that thread outlets equipped with pilot operated check valves to prevent cylinder drift are particularly troublesome.

TOH

OK, That's the purpose of this tool then.

 

[TheOldHokie]

OK, That's the purpose of this tool then.

Yes. There are also couplers that are designed to connect and disconnect under pressure. Today this type of coupler is commonly supplied as OEM on many tractors. The ones on the little Kubota are not OEM - I added them myself.

TOH

 

[BarnyardEngineering]

I guess where I get confused about open center hydralics is..............

My Oliver exhibits the same "problem" that most Oliver owners experience. It's a reportedly open center system, but the remotes are always under pressure. Makes it a booger to hook up implements, unless you do what I did......add a shutoff valve immediately in front of the coupler on the tractor.

So............if everything is under pressure at all times, the system has to have pressure relief(bypass) to keep the pressure constant. Consequently, the hydraulic unit on top of the tranny will get so hot that you can burn your leg on it if not careful.

The Allis will not do this. You can relieve pressure on the couplers simply by shutting off the engine, and working the levers. NOT SO WITH THE OLIVER...........IT RETAINS PRESSURE EVEN WHEN ENGINE IS SHUT DOWN. On the Allis, IIRC, you can relieve pressure on the couplers with the engine running, by simply depressing the ball check valve in the coupler, but don't quote me on that........it's been a dog's age since I hooked anything to those remotes.

IH tractors have a "float" position which releases the pressure on the hydraulic ports. You saying Olivers do not have this?

 

[TheOldHokie]

IH tractors have a "float" position which releases the pressure on the hydraulic ports. You saying Olivers do not have this so,

Not all remote valves have a float position and its often an option. But since spool valves all leak internally they dont hold pressure long. And since they leak they also allow cylinders to drift so some tractors have pilot operated checks on the woirk circuit to prevent that. The checks require pressure to operate so you have to apply pressure to the circuit to release pressure. A bit of a Catch 22.

TOH

 

[OldMassey44]

I know it's been a while, lots of projects going on before winter hits but I finally installed a pressure gauge between the pump and valve, when the ram is fully extended and held, if I balance the valve handle to keep the engine from stalling I see at most 500psi on the gauge. I also installed a filter, replaced pump oil seal and internal oring. Pump is in rough shape internally there were some very bad grooves which I'm not surprised about because I had found a decent piece of metal in the pump when I first bought the splitter, new pump will be the plan for the future but for now I filled with JB weld and sanded smooth. I'll be happy if it lasts long enough to figure out the heat issue

 

[OldMassey44]

I also replaced the relief valve orings, the backer ring crumbled apart and the oring looked like it hadn't been sealing completely

 

[OldMassey44]

I'm tempted to play with the pressure relief setting but I might wait to hear what you guys have to say first

 

[caterpillar guy]

Still need more oil and maybe a cooler.The valve in 37 is plumbed right to work fine. The gauge wants to go in the line from the pump so you know what the pressure is on both strokes. IT also might want to be a higher pressure on the gage since the only limit is the relief valve or the pump depending one if the valve has a relief in it or not. Oil needs space and volume to cool and should not get hotter than the 190 -200 you are getting now. Now that is the reason it needs more reservoir and maybe a cooler since tanks are not all that expensive. 5-10 gallon would work if yours is less than that if yours is now 5 gallon I would go to 10-15 gallon for it. You don't want more than the valve and lines can handle. IF you have lines of 2000PSI then you don't want more than that. the weakest link is the one that will fail and it can be a seriously bad mistake paling with the relief pressure. IF to hihg bad things happen to low and it will not do thew work.

 

[trackrat]

Open center hyd. only circulates oil at almost no pressure until a valve is moved to interrupt the flow of oil and send it to whatever function is to be used, then and only then does the relief valve come into play. Also, no oliver tractor hyds had a float setting they were very simple systems