Hydraulic opinion

[J_J]

AKKAMAAN,

Do you have software to set up something like this as a simulation.

 

[AKKAMAAN]

What I meant to say was that the work ports used fluid from a cyl or motor dumps into the OUT/TANK port. So if you pressurize the out port as in a reverse condition, you stand a good chance of damage to the valve since the psi on the out port is about 500 psi. If the winch motor loads up, you will far exceed that pressure.

Is this how it was supposed to work??

And when valve#1 is shifted in "reverse", this happens...Load check in valve #2 blocks flow, and PRV in valve #1 opens

 

[J_J]

I really don't know how the fluid flows in a reverse situation. There have been several instances on here where someone connected the valve backward and the valve cracked. With the second valve in neutral, and PB installed, the fluid would just flow through the valve back to the first valve. If the first valve is shifted to reverse flow to allow winch operation, the fluid now enters the PB port of the second valve. From there, just guessing. But if the fluid makes it to the motor, the expended fluid will exit the OUT port, and no fluid will flow back to the first valve. If the OUT/tank port is plugged, I see a deadhead situation.

Is there a check valve in those spools? I know there are load checks in most valves, but are only functional when shifting the spool.

 

[DonnieP]

I had a valve hooked up for a short time with supply in PB port. If you moved the valve half stroke, you would get some fluid out work ports, but not full flow. If you stroked the valve full stroke, there was no flow and the safety would lift.

Donnie

 

[glastron23]

JJ.. this can not be done with this configuration, he if wants to control the winch from the front or rear he will need to install a selector valve then have 2 control valves. do not use motor spools and T the hydraulic lines in at the motor. If he is using this on a winch, the motor can not be driven be the load on the winch cable as the winch worm and bull gears can not be reverse driven...

 

[J_J]

I believe all hydraulic winches can be reverse driven, unless there is a reverse gear setup. There is no free wheel on this winch, so in order to pull out the cable, the winch has to be reverse driven.

Look at post #96. that is the winch and valve.

http://www.tractorbynet.com/forums/power-trac/170326-winch-modifications-10.html

http://www.surpluscenter.com/item.asp?item=9-7861&catname=hydraulic

http://www.surpluscenter.com/Instruct/I9-7861.pdf

 

[glastron23]

Sorry about that JJ, what i meant by reverse driven is that a load on the cable can not turn the worm gear to drive the motor. The motor can be turned either CW or CCW. The winch he has is a planetary drive system, there should be some kind of internal braking system, it looks like he has a Warn winch?? What model is this?? Some of these models can and some not be driven both ways. There is a T handle on the winch with a yellow tag, this should be the release for the drum to free spool??? Jim

 

[2458n]

I have just purchased a hydraulic winch off of a rollback truck. The motor is on the winch; the valve went with the truck bed. What type of valve do I need to run this off of an open centered tractor system? I currently have a valve off of a log splitter. Thanks for any help.

 

[DonnieP]

What about putting a tee each port of the motor and hooking the work ports of the two valves in parrallel. Port 'A' of valve 1 and port 'A' of valve 2 to one of the ports on the motor and port 'B' of valve 1 and port 'B' of valve 2 to the other port on the motor. I know when you activate one of the valves, you'll be back feeding to the corresponding port of the other valve, but I believe it should handle that, shouldn't it? It would be no different than driving around with a load in your FEL.

Donnie