Winch Modifications

[J_J]

Bob,

How did you plumb that valve?

I may have answered my own question. In order to reverse the flow at the winch, from the seat, you would have to use the QA hyd. In doing so, you cause hyd fluid to flow to the new valve when in the fwd position. However if you reverse the flow using the QA lever, you will be sending fluid to the PB port of the new valve. and the used fluid from the winch will exit out the IN port, back to the QA valve, and then to tank.

I am not sure this is a good idea. Logical thing to do would be to send fluid to the new valve with the hyd flow going from the PB port of the FEL valve to the IN port of the winch valve,and reverse the flow at the winch valve only.

For faster winch operation, use the PTO circuit. It is one way only and can be locked on by a switch.

If I am wrong, I am sure someone will correct me.

What say others?

 

[MossRoad]

I say the fluid comes into the valve and if it is centered the fluid goes directly back to the tank.

If he moves the lever forward, the fluid goes through the valve through a port, through the winch motor, back to the valve and back to the tank.

If he moves the lever back to center, the fluid just goes back to the tank.

If he moves the lever to reverse, the fluid goes the opposite way through the winch motor and then back to the tank.

Now if he tried to do it from the seat, I am not sure what would happen, as I do not know the valve on the back can handle open center in reverse flow condition and I do not know if the reliefs in the rear valve would work in reverse flow.

 

[J_J]

The problem with that is he said he could control the winch by sitting in the seat or at the winch by locking rear valve open. That, to me means that if he locks the rear valve in fwd position, then the QA lever will activate the winch. The fluid will flow from the QA valve to the IN port of the rear valve, and the winch will pull in. Now if he reverses the QA lever, he is sending the fluid to the rear valve in the reverse direction.

If he does not use the QA valve but lets the fluid flow from the PB port of the FEL, then he can use the rear valve as was designed, with supply fluid coming to the IN port, and exiting out the PB/OUT port. The winch will reel out and reel in with the rear valve lever position.

Bob, how about a rough drawing of the valve and hose arrangements.

Where is the fluid for the rear valve coming from?

 

[J_J]

I say the fluid comes into the valve and if it is centered the fluid goes directly back to the tank.

If he moves the lever forward, the fluid goes through the valve through a port, through the winch motor, back to the valve and back to the tank.

If he moves the lever back to center, the fluid just goes back to the tank.

If he moves the lever to reverse, the fluid goes the opposite way through the winch motor and then back to the tank.

Now if he tried to do it from the seat, I am not sure what would happen, as I do not know the valve on the back can handle open center in reverse flow condition and I do not know if the reliefs in the rear valve would work in reverse flow.

What you say is true, but what is the source of the fluid for the rear valve?

 

[MossRoad]

. Now if he reverses the QA lever, he is sending the fluid to the rear valve in the reverse direction.

I thought that's what I said. :laughing:

 

[J_J]

I believe one of the guys on TBN connected his valve up backward, and it cracked his valve. It would be logical as the out port are usually rated about 500 psi.

We don't know if Bob used the OUT port or the PB port on the second valve. The PB port will take the pressure, but the out port might not.

The relief will be on the way out of the valve.

Don't know exactly what will happen to all the functions if a hyd valve is connected backward.

If you pressurized the tank port,;you might be in trouble.

 

[BobRip]

Bob,

Are you using the PTO hyd's or the Quick Attach circuit hyd for the winch?

It's the quick attach one. I think with the only 4000 lb force on this winch the quick attach is adequate. The old 10000 lb one came off the PTO Hyd and probably needed it just before your PT broke in half .

 

[BobRip]

Bob
Thats a neat installation and will be really versatile. Very nice job Bob.:thumbsup:
Its great having a winch in the front or back. I use the small grapple boom on the back to load the heavy winch assembly up to slide onto the receivers so I don't have to lift it with my back. these things are heavy. Watch for the cable/choker slinging back at you under load if you are standing next to the winch.

Yes that winch is heavy. Getting it aligned takes too many seconds. Do you have a picture of the boom you put on back.

 

[BobRip]

I believe one of the guys on TBN connected his valve up backward, and it cracked his valve. It would be logical as the out port are usually rated about 500 psi.

We don't know if Bob used the OUT port or the PB port on the second valve. The PB port will take the pressure, but the out port might not.

The relief will be on the way out of the valve.

Don't know exactly what will happen to all the functions if a hyd valve is connected backward.

If you pressurized the tank port,;you might be in trouble.

First thanks for the comments. I want this thing to be safe.

I am using the C and P ports to bring and return the fluid to the valve. The T port is blocked. I figure (wrongly maybe) that the relief valve on the quick attach valve will relieve pressure if needed.

 

[BobRip]

Bob, how about a rough drawing of the valve and hose arrangements.

Where is the fluid for the rear valve coming from?

The fluid for the rear valve is coming from the quick connect connectors which also go to the quick attach cylinder. This fluid of course goes through the quick attach valve.