3 point control lever raising bucket

[erj]

I am glad that you got it working properly again!

However, if the rest of you do not mind I would like to further my continuing education of the hydraulic system.
Can someone explain what happens in the system when:
1. The three point flow control valve is completely closed.
2. The three point control lever is pushed forward into the Lower position.
3. The FEL bucket raises.

It would seem to indicate that the hydraulic fluid reverses normal direction and somehow activates the Raise portion of the FEL valve.

Is that possible?

Thank you,
RonJ

 

[greg_g]

I believe you're in the same camp with me and Tommy. Doesn't seem that loader circuit was plumbed in correctly in the first place.

//greg//

 

[erj]

Techman,

Even though you got your problem solved, perhaps you can help us with understanding what was happening.

Look at the pictures below to see if they are like your plumbing.
There is a line A from the pump to the FEL control valve whose controls look something like these.
There is a line B from the FEL control valve to the 3-point valve.
There is one more line that you mentioned that goes from the tank to the pump.

Is this correct? Are there any other hydraulic lines?
RonJ

 

[ggtechman7]

RonJ- Continuing the discussion in depth is great, the more we know about our tractors, the better we could take care of them and keep them running better/longer. Regarding one of your question I found out following about the 3PtControlValve:
"Floating control is suitable for field plowing. In floating control, the supporting wheel is needed for implement. During plowing, hold the control lever of distributor at "lowering" position (i.e. push the control lever of distributor forward with the return stopper. Do not return the control lever to the neutral position). The hydraulic circuit is then in "floating" control. Using floating control, the plowing depth is controlled by the change in height of the supporting wheel. The uniform plowing depth will be obtained in the field with changes of soil resistance.
In looking at your pictures, that is how my hydraulic lines run, looks like your pressure line runs in series through the FEL valve also. I have attached a sketch of how my system inter-connects. I'll see if I can take some actual pictures of system in next few days.
George

 

[ggtechman7]

I was able to take some photos of the hydraulic system, so here they are. Again that flow control valve adjusting screw was screwed in down all the way clockwise, which kept the 3 point from working, now it is at about mid way up between fully closed, and fully open.