Hydraulics for quick attach Grapple

[Mangumck]

I am sure this has been discussed many times. I have a mahindra 4025 with a frount end loader. I have a quick attach grapple. I will not use the Grapple often and dont want to put alot of money into 3rd funtion remotes, and single button controllers.

my question is can I just add a single spooler control to operate the opening and closing of the grapple by just teeing off the pressure and suction lines that go to the spooler control for the front end loader?

If this is not possible what the the next low cost option? There are not aux hydralic ports.

 

[J_J]

You can not tee into pressure side of the valve.

If your FEL valve has PB, you add a single spool valve with PB, in series and work the grapple.

You could do the diverter valve thing, or the 3ed function valve also.

 

[Gordon Gould]

Welcome to TBN.
Here is how I added a valve for my grapple. There are about three levels of project links that you can look back in. They may give you some ideas you can use.

http://www.tractorbynet.com/forums/...inished-my-3rd-function-valve.html?highlight=

 

[Mangumck]

Thanks for advice. Have not worked with Hydraulics before so post are grealty appreciated.

 

[Mangumck]

Another question. What type of single spool valve do i need. I know if my FEL valve has a PB the new valve needs a PB. What do you recommend as far as open, closed, float, spring lever, etc?

 

[Mangumck]

This is the information im looking for advise on.

GPM
Open center or closed center system
PSI
Do you need power beyond
Spring to Center or Float?

 

[J_J]

http://www.tractordata.com/farm-tractors/006/2/9/6294-mahindra-4025.html

Hydraulics:
Type: open center
Valves: 0 or 1
Total flow: 8.29 gpm [31.4 lpm]
Steering flow: 4.8 gpm [18.2 lpm]

You need PB to pass fluid downstream for other valves.

Most levers on valves are spring to center.

Float is on the end of the spool and allows the bucket to follow the conture of the ground.

Psi is probably around 2500 to 3000.

 

[voivedich]

i mounted a grapple on my NH785 diesel skidsteer...then the long cylinders leaked under load...I've had them rebuilt and installed ...how do I bleed the system? the aux-hydraulic handle is stuck in the close grapple position and the main arms are resting on the safety pins...pressing the up pedal will not raise the arms off the safety pins. Voivedich

 

[Xfaxman]

i mounted a grapple on my NH785 diesel skidsteer...then the long cylinders leaked under load...I've had them rebuilt and installed ...how do I bleed the system? the aux-hydraulic handle is stuck in the close grapple position and the main arms are resting on the safety pins...pressing the up pedal will not raise the arms off the safety pins. Voivedich

For a problem like this you need to start a new thread in the CONSTRUCTION EQUIPMENT FORUM.

Click this link, Construction Equipment , then click + Post New Thread , Put "NH785 Skidsteer Need Help" in the Title , Then enter your questions.

Good luck.

 

[Mangumck]

Grapple was delivered and i am going to try and hook up this weekend. I have attached a picture of my FEL controller. Any help on how to connect the new single spool controller to the FEL controller would be greatly appreciated.