2600 hydraulic question

[Roy B]

Hi
I put one of the hydraulic manifolds that go between the lift cover and the factory plate. From this I have run through a 2 spool valve with a power beyond adaptor and back to the manifold. Should this system be able to operate a single acting cylinder? I have installed a fisher snow plow on the front of the tractor. The new hydraulic system lifts, but will not lower the plow. Is there a solution besides replacing the lift cylinder with a double acting unit?
Thanks
Roy

 

[RodinNS]

Did you also plumb a return line from the valve body? Power beyond type valves require the inlet, a power beyond port that is routed back to the sandwich plate and then a return/case drain that is to be routed directly to sump, generally by installing a tee in therear axle housing fill port. If you don't have the return line there is no pathway for return oil to exit the control valve.

Rod

 

[Roy B]

Thanks for the quick response. I ran a line from the P port on the sandwich plate to the P port on the valve. I placed the power beyond adaptor on the exit port of the valve and ran from it back to the other port in the sandwich plate. The old push/pull valve I had on the lift cover used to use the return line you mentioned. How do I plumb one into what I have now?
Thanks for your help Rod
Roy

 

[JMOR]

(quoted from post at 20:22:52 02/18/12) Thanks for the quick response. I ran a line from the P port on the sandwich plate to the P port on the valve. I placed the power beyond adaptor on the exit port of the valve and ran from it back to the other port in the sandwich plate. The old push/pull valve I had on the lift cover used to use the return line you mentioned. How do I plumb one into what I have now?
Thanks for your help Rod
Roy

ome valves have a screw that you have to turn to set them for either dual or single acting cylinders, too.

 

[Roy B]

Rod
What would happen if I ran a line from the second remote to the sump. This should bleed the pressure off that spool. Will this cause my 3 ph arms to drop?
Thanks
Roy

 

[Roy B]

(quoted from post at 17:43:42 02/18/12)

(quoted from post at 20:22:52 02/18/12) Thanks for the quick response. I ran a line from the P port on the sandwich plate to the P port on the valve. I placed the power beyond adaptor on the exit port of the valve and ran from it back to the other port in the sandwich plate. The old push/pull valve I had on the lift cover used to use the return line you mentioned. How do I plumb one into what I have now?
Thanks for your help Rod
Roy

ome valves have a screw that you have to turn to set them for either dual or single acting cylinders, too.

I don't see any adjustments other than the one to set the detent on the float. Do I need the power beyond adaptor for this application? Is it what is causing my problems?

 

[JMOR]

(quoted from post at 17:39:06 02/19/12)

(quoted from post at 17:43:42 02/18/12)

(quoted from post at 20:22:52 02/18/12) Thanks for the quick response. I ran a line from the P port on the sandwich plate to the P port on the valve. I placed the power beyond adaptor on the exit port of the valve and ran from it back to the other port in the sandwich plate. The old push/pull valve I had on the lift cover used to use the return line you mentioned. How do I plumb one into what I have now?
Thanks for your help Rod
Roy

ome valves have a screw that you have to turn to set them for either dual or single acting cylinders, too.

I don't see any adjustments other than the one to set the detent on the float. Do I need the power beyond adaptor for this application? Is it what is causing my problems?

y your words, this does not sound like what you have:"PB is "Power Beyond", which is similar to an open center control valve except that it has 2 outlet lines, one is designated as "Power Beyond" and supplies power to another implement downstream of the first one, and the second line only provides a return path for the fluid being pushed out of one side of a cylinder when the valve is providing power to the other side of the cylinder.

Can you draw a sketch of what you have or better describe it?

More info may get you more responses.

 

[RodinNS]

I'm not sure what you have there orif it's actually a power beyond setup. You should have three ports on the control valve plus the work ports. The plate will have two ports and you need to add a sump return path at the rear axle filler.
Either a diagram of what you have or a couple of pictures would be very valuable.
Generally a PB type control valve will have it's inlet on one side... then on the other side of hte valve bank you will have a PB port on the side closest to the spool valve handles and the sump return on the lower end...

Rod

 

[Roy B]

There is one P port, one exhaust port and four work ports. I have a power beyond sleeve threaded into the exhaust port of the valve and the line back to the plate hooked to this. Is the line back to the plate under pressure requiring the power beyond adaptor?, or is it just a return line and the adaptor is not needed. I would simply remove the adaptor but I do not want to over pressure the exhaust port and damage the valve. I will try to post pictures tonight. Thanks for all the help.
Roy

 

[JMOR]

(quoted from post at 12:15:31 02/20/12) There is one P port, one exhaust port and four work ports. I have a power beyond sleeve threaded into the exhaust port of the valve and the line back to the plate hooked to this. Is the line back to the plate under pressure requiring the power beyond adaptor?, or is it just a return line and the adaptor is not needed. I would simply remove the adaptor but I do not want to over pressure the exhaust port and damage the valve. I will try to post pictures tonight. Thanks for all the help.
Roy

our PB adapter sleeve separates the open center pump flow from the exhaust flow. It is needed in the application. I still think your problem is that either your control valve is for dual acting cylinders only OR that you have not yet found the screw that allows a setting for single acting cylinder (it is generally on only one spool of a two spool valve).

 

[RodinNS]

I've never seen a valve set up like that. The ones I've sealt with have three ports cast in the body...
If I see a few good pics of the valve I might see something that sticks out.
What happens if you direct the flow of the unused work port back to sump or into a bucket?

Rod

 

[JMOR]

(quoted from post at 15:01:24 02/20/12) I've never seen a valve set up like that. The ones I've sealt with have three ports cast in the body...
If I see a few good pics of the valve I might see something that sticks out.
What happens if you direct the flow of the unused work port back to sump or into a bucket?

Rod

hinking he may have something like this
(pg 6) , where PB sleeve is installed where plug is shown.
http://www.princehyd.com/Portals/0/products/valves/catalog/ValvesRd5000.pdf
http://www.surpluscenter.com/item.asp?catname=hydraulic&item=9-4895-B
Guess he may tell us sooner or later.

 

[Roy B]

Here are a few pictures of what I have. The first is the sandwich plate the line on the right of the picture is stamped P and runs to the P port on the valve. Exhaust port has PB adaptor pointed at in pic 2 Pic This plumbs back to the return port in the plate. 4 work ports go out to remotes. The last picture is the remotes. The top line runs forward to the life cylinder. The bottom line runs to the sump. Set up this way the lower and angle functions work when the valve is in the detent float position. The angle function Left/right on the joystick will not work unless the valve is in float. Its useable this way, but I would like to have it right.
There are optional P/Exhaust ports that are plugged, which face the same direction as the work ports, see pic 3. These were open inside the valve to the ports I used.I assumed they were for more options when plumbing. Could this be an option for a return to sump line? I included a link to the valve I am using.
Thanks again for all the help. Sorry about the long post
Roy

Princess Auto BM40 joy stick with float

 

[JMOR]

Your pictures don't show me all sides of your control valve, so I couldn't be sure whether it had connections for both PB and (tank) sump return, so I went to catalog (link below) & it appears that it is either/or, not both. I also notice that on the link you posted that there was a statement that said, "Convertible spool types: Motor/SA". This to me implies that your valve is likely equipped with a DA spool. If so you need the SA spool (B, BS, C....) instead of A, AS, SP, D... If you have numbers such as
BM40)/3 GU(_) MO B2 MO A1 MO K16, you can use the catalog pages to decode which spool that is in your valve.
http://www.blbhydraulic.com/PDF/Catalogo_BM40.pdf

 

[Roy B]

Hi
I am going to run a return line to the sump from the port just
to the right of my finger in pic 2(as Rod said was required). This is on advice from a
rather intelligent sounding hydraulics guy at Princess Auto.
This should allow the valve to operate the power angle (double acting cylinders) in
other positions besides float. I will still have to run the hose
from the unused remote to the sump to operate the single
acting cylinder used to lift the blade. The other option is to
change to the SA spool as you had suggested. Since most of
my other implements have double acting cylinders, I will go
with the hose. Thanks for all your advice. Roy

 

[JMOR]

(quoted from post at 21:40:29 02/21/12) Hi
I am going to run a return line to the sump from the port just
to the right of my finger in pic 2(as Rod said was required). This is on advice from a
rather intelligent sounding hydraulics guy at Princess Auto.
This should allow the valve to operate the power angle (double acting cylinders) in
other positions besides float. I will still have to run the hose
from the unused remote to the sump to operate the single
acting cylinder used to lift the blade. The other option is to
change to the SA spool as you had suggested. Since most of
my other implements have double acting cylinders, I will go
with the hose. Thanks for all your advice. Roy

ood deal! Sounds like you have a solution.

 

[JMOR]

(quoted from post at 21:40:29 02/21/12) Hi
I am going to run a return line to the sump from the port just
to the right of my finger in pic 2(as Rod said was required). This is on advice from a
rather intelligent sounding hydraulics guy at Princess Auto.
This should allow the valve to operate the power angle (double acting cylinders) in
other positions besides float. I will still have to run the hose
from the unused remote to the sump to operate the single
acting cylinder used to lift the blade. The other option is to
change to the SA spool as you had suggested. Since most of
my other implements have double acting cylinders, I will go
with the hose. Thanks for all your advice. Roy

ood deal! Sounds like you have a solution.