4R - 3rd Function Hydraulic Question?

[LouieJunior]

Can anyone tell me how to relieve pressure in my 3rd function (grapple) lines. There are times i cannot unfasten the quick connect couplers when i want to remove the grapple. My prior tractor had a bleed valve for these lines. Moving my joystick with the engine off relieves the pressure in the lift and curl lines - but not the third function.

 

[kennyd]

Turn the engine off, then turn the key back to the run position, now press the buttons on the joystick-that should activate the solenoid valve and relieve the pressure.

 

[Wagtail]

Can anyone tell me how to relieve pressure in my 3rd function (grapple) lines. There are times i cannot unfasten the quick connect couplers when i want to remove the grapple. My prior tractor had a bleed valve for these lines. Moving my joystick with the engine off relieves the pressure in the lift and curl lines - but not the third function.

I know that, on my rig, after doing that I need to then 'depress' the 3rd function button on the joystick (you may hear/feel a "clunk" from the 3rd function valve) and, again, move the joystick around.

That relieves the 3rd function pressure and I can remove/insert the couplers easily. (And without cursing a blue streak! )

 

[LouieJunior]

I know that, on my rig, after doing that I need to then 'depress' the 3rd function button on the joystick (you may hear/feel a "clunk" from the 3rd function valve) and, again, move the joystick around.

That relieves the 3rd function pressure and I can remove/insert the couplers easily. (And without cursing a blue streak! )

I see you have a JD4105. Same tractor I referenced above with the valve for 3rd function pressure relief. My 3rd function used a rear remote which was routed under the hydro pedals with electronic thumb control on my joystick. To relieve the hose pressure, I loosened the small valve on top of the rear remote mount. I was very happy with my 4105. When the grapple was removed, I could use the rear remote for another application such as hydraulic top link. Now I have 3rd, 4th and 5th SCV.

 

[WM75Guy]

Both my new grapples came from the dealer with pressure in the hoses so I couldn't make the connection. The dealer staff must have disconnected with the engine running. I had to bleed off pressure by loosening a line on the grapple before I could make the connection.

Like the others have said I disconnect after turning the engine off, key back on, press the third function button, and go left and right with the joystick. I make sure I have the joystick centered before I release the button. I have the factory NH third function kit. Seems to work for me.

 

[Zebrafive]

Just a temp change can make the pressure go up in a detached grapple hose. I would not blame the dealer staff.

I ended up adding couplers to the lid of a 5 gallon bucket to connect my grapple hoses to when removed. Solved all my hard to reconnect problems.

 

[beenthere]

Zeb
Pic of that fabrication? Sounds a clever way to handle the storage time of FEL or grapple.

 

[Gregster613]

Zebrafive, How does that do anything to relieve pressures? Not arguing, just don't understand how putting disconnects in a bucket lid does anything? If it works that's a great idea to share and I'm getting my new thumb this week so I'm always looking for ways to improve my processes, but I can't see that as actually doing anything.

 

[WM75Guy]

Mine came with the flat faced couplers. With the least amount of pressure there was no way I could make a connection. Once I cracked a hose connection and bled them off they connected without a problem. While the flat faced couplers make keeping the couplers clean easier I am not sold on them.

 

[kennyd]

Zebrafive, How does that do anything to relieve pressures? Not arguing, just don't understand how putting disconnects in a bucket lid does anything? If it works that's a great idea to share and I'm getting my new thumb this week so I'm always looking for ways to improve my processes, but I can't see that as actually doing anything.

Read what he wrote carefully, he connects the grapple hoses to couplers mounted on a bucket lid, so the lines are "open" to the atmosphere and thus can't build up any pressure.