hydraulic problems

[triangel]

I am building a wood processor and I set up the hydraulics with bad results, I purchased all the components from princess auto, 8hp two stage pump driven by a 18 hp motor at 1800 rpm. I have run it through a MD30 triple valve. the pump puts out 16 gpm at low pressure and 4 at high, the valve is rated for 25 gpm,3000 psi max set at 2000 psi from factory.I purchased also a power beyond valve kit for this valve because I hooked up a single valve 30 gpm rated at 3225 psi with kick off for my splitter. the way I have it hooked up pressure from pump to triple valve,first valve is hooked to an orbit motor to drive my log mover,second valve to a 1.5 inch cylinder for my log clamp, third valve is hooked to a 3" and 2" cylinder for my saw and log stop, the fourth valve is for my log splitter with the kick off on return. the line from there goes back to the filter and reservoir. all valves have build in pressure relief valves. fired it up and went to move a cylinder on second valve the piston came out and would not go back, tried the other piston same result, moved the orbit motor and it burst, shut it down all valve were fully pressured on both sides. No Idea what went wrong, Princess auto hyd tec told me this was correct, I think but do not know for certain that the power beyond valve is the problem. any answers would help as this scared the crap out of me

 

[LD1]

Sounds like something is amiss on the return. I am having a hard time visualizing the setup. Pictures I think would help.

 

[triangel]

some pics the second picture shows the port from the first valve body to the second valve body . originally the return is where the plug is and where it is connected is the changeup to power beyond that I was told I needed to hook up the second valve. also in the second pic I do not have one hose hooked up to the splitter piston yet in case you are wondering why just did not have it done when the pic was taken.

 

[J_J]

Should not run a hyd motor off the same valve as cyl.

The spools may share flow and mess things up or one spool may have priority and take all flow for that spool hyd. .

You need an open center valve with PB for the cyl.

Did you install the PB or the closed center plug.

Do you have a dedicated tank line?

Show the side of the valve with PB, and label all ports.

You need a splitter with the GPM requirements that the motor needs.

For open center valves, the flow is provided by a gear p ump that pumps fluid all the time and that fluid has to flow from pu mp to tank at all times.

Your PB adapter will look like one of these.

Last picture is a CC plug.

Did you install a hose in the PB port?

I am thinking your valve burst because you plumbed it wrong.

Air in the IN port will help you plumb it correctly.

Just ask the questions you need answered and someone can help.

 

[triangel]

some pics of drives

 

[triangel]

the orbit motor is on its own valve, each cyl is on its own valve, I should clarify when I said valve I should have valve body as the first valve body has three valves and the fourth is added on.

 

[J_J]

some pics of drivesView attachment 422316View attachment 422318View attachment 422320

Are those tee fittings in a return line or tank line?

I see water pipe fittings all over your system, and on pressure lines.

I would not recommend water pipe fittings, should get hyd fittings. Tank line might be OK.

 

[triangel]

the tee fittings are on the saw control cyl. the tee goes to a second cyl which is the log stop. these two cylinders are on the last valve of the three valve body

 

[J_J]

some picsView attachment 422314View attachment 422315 the second picture shows the port from the first valve body to the second valve body . originally the return is where the plug is and where it is connected is the changeup to power beyond that I was told I needed to hook up the second valve. also in the second pic I do not have one hose hooked up to the splitter piston yet in case you are wondering why just did not have it done when the pic was taken.

In one picture, you have the tank line plugged.

Using PB, tank line must go to tank.

I am not surprised that you busted the motor. Whenever you use the first valve, you also take away fluid from the second valve.

Do you need the motor spool locked on or temporary on/off?

 

[J_J]

the tee fittings are on the saw control cyl. the tee goes to a second cyl which is the log stop. these two cylinders are on the last valve of the three valve body

Did you want the cyl to operates together or in sequence?

Either way, should not have water pipe fittings in the cyl if your hyd pressure is up around 2500 to 3000 psi.