hyd problems

[Redfarmdogs]

yes i understand . But is this my hydraulic lock problem Thanks for your help JJ

 

[J_J]

Did you check that your cyl hoses were attached to A1,B1?

 

[Redfarmdogs]

yes, using only one spool valve at this time other spool valve plugged off. so i would call it a1 & a2 dave

 

[oldnslo]

don't have my manual at hand but i believe that was governed speed settings. Yes on the direct drive. Won't the flow control valve after setting take care of the stalling problem? It is the valve at princess auto. Dave

Dave,
no the flow control will not take care of the stalling problem. Your pump is fixed displacement and it is trying to move x GPM period. It doesn't care where it goes but it is going some where. Pressure is created by the resistance to the flow. This resistance to flow/pressure is what is causing your engine to stall. The flow control is just going to determine how fast your log splitter cylinder moves.

If the cylinder does not stroke with no load you have a plumbing issue which is what JJ has been trying to explain to you.

A few questions:
Are you shifting the valve spool fully? If not this will act like a needle valve and restrict the flow which will cause your engine to bog down.

1)What size do you have from the pump to the directional valve?
How long is this hose?
2) What size hose do you have from the valve back to the reservoir? Length. of this hose.
3) What size hoses do you to your cylinder?

4) Can you loop the cylinder ports? I.e. just connect the ports with out the cylinder. Does the motor still stall when shifting the valve? If yes you are using the wrong ports on the valve body. If no you have either a mechanical bind on the cylinder or one of the cylinder ports or hoses is restricted or blocked.


Roy

 

[wdchyd]

??..Could it be you're pushing too much oil through the control valve on return stroke..??

When a d/a hyd cyl is returning.....the oil displacement on the base end of the cyl is greater and the rod end is less intensifying the flow.....

In example: if the displ ratio in the d/a cyl was 2:1 and the pump put out 10 gpms....then the return gpms coming out of the cyl would be 20 gpms (double)....

Maybe your control valve is not sized for the "Greatest" flow encountered and the flow is backing up in the valve core instead of dumping to tank...

If not I'd be looking at your fitting/hoses sizes restricting flow....

 

[Redfarmdogs]

found the problem. Out of the return port of the hyd control valve had what i was told a power extender, that was blocking the oil return port from the spool valve when worked machined that part off of the return port and presto were splitting wood. J.J. you were right i didn't need the flow divert er valve so i will remove it THANKS TO ALL. this is a great site Dave

 

[oldnslo]

found the problem. Out of the return port of the hyd control valve had what i was told a power extender, that was blocking the oil return port from the spool valve when worked machined that part off of the return port and presto were splitting wood. J.J. you were right i didn't need the flow divert er valve so i will remove it THANKS TO ALL. this is a great site Dave

My guess from what you are saying is that your valve had a power beyond option and you didn't have the tank line connected correctly. Good to know you are splitting wood.