Kubota diverter valve and hydraulic top link question

[I_have_a_tractor]

Hello, I'm hoping someone can help me out with my problem.
I installed years ago a bosch rexroth diverter valve on my kubota FEL curl circuit. I use it with grapple. I Understand this is not a "true" 3rd function but has always served me well.
I purchased recently a hydraulic top link (sparepartsholland one) with the locking block.
My thinking was I will just use the same two hoses from my diverter, just move them to the back when needed. This doesn't seem to work for me with the locking block on the cylinder.
With locking block I can move one direction no problem but not the other. It may move slightly then deadheads. Swap hoses and same thing only opposite direction. Remove locking block and connect direct to cylinder, works great, just like grapple cylinder.

Do I have a fundamental hydraulic issue where this is what would be expected with the setup I have? Or is it possible that the locking block is defective?
Thanks!

 

[LD1]

The La463 loader on the 3400 has a two position dump function. One is regen which pressurizes both cylinder ports.

Not sure which is first....try pushing the dump direction PAST the detent and see if it acts normal? It should feel like when lowering the loader and pushing past the detent to make the loader float

 

[I_have_a_tractor]

The La463 loader on the 3400 has a two position dump function. One is regen which pressurizes both cylinder ports.

Not sure which is first....try pushing the dump direction PAST the detent and see if it acts normal? It should feel like when lowering the loader and pushing past the detent to make the loader float

Thanks LD1 for your feedback. Yes the loader has fast dump, you can feel the detent. This did work as well. It's kinda unusable though unfortunately. The cylinder just moves too fast when in that range, even at idle. Interesting though the company shipped me a new locking block. I installed it and now both directions on the loader valve = the same direction for the cylinder (doesn't dead head one way) unless you go past fast dump detent, then rockets the other direction. I haven't tried putting the original block back on but assume I would see deadhead one direction until fast dump range. I think I may be at a loss on this. Sounds like my loader valve isn't ideal for this use or at least used with the locking block installed. Without it of course I can make fine adjustments either direction. Can't explain the new block going same direction now but whatever. Maybe just run it no block and see how it does.

 

[kennyd]

You can add an inline restrictor to slow the speed down, you can even make your own depending on what fittings and tools you have.

 

[MtnViewRanch]

Forget about using the curl mode, use the up-down mode.

 

[LD1]

Restrictors will slow it down and make it less jerky. Im surprised the cylinder didnt come with restrictor fittings.

The cylinder going the same direction is normal (assuming thats extend). If you have curl set up as extend.....then 1st postition regen dump will ALSO extend the cylinder.

You can swap hoses and have curl back retract the cylinder and dump extend the cylinder then you dont have to worry about detent, regen, etc. It just wont extend with as much power.....which is fine because a TL dont need to extend with much power.

 

[I_have_a_tractor]

Restrictors will slow it down and make it less jerky. Im surprised the cylinder didnt come with restrictor fittings.

The cylinder going the same direction is normal (assuming thats extend). If you have curl set up as extend.....then 1st postition regen dump will ALSO extend the cylinder.

You can swap hoses and have curl back retract the cylinder and dump extend the cylinder then you dont have to worry about detent, regen, etc. It just wont extend with as much power.....which is fine because a TL dont need to extend with much power.

Thanks again LD1, KennyD, and MTNviewRanch. I was thinking of swapping the diverter to the up-down instead of curl, I do remember reading that for something safety related your supposed to use the curl circuit. Can't find that now for some reason. Is that true? I'm going to work on it in the next few days see what works best. LD1, from what you mention above, what I have is working as expected. Do you think the original locking block was defective? The new one has holes drilled in different places.
Guys, I really appreciate the help and recommendations you have provided.

 

[kennyd]

I do remember reading that for something safety related your supposed to use the curl circuit. Can't find that now for some reason. Is that true?

Not true in my book...

 

[MtnViewRanch]

If it were an issue, I would not have recommended doing it.

 

[I_have_a_tractor]

If it were an issue, I would not have recommended doing it.

This is the route I just finished up and it works great for the top link. May even end up liking it better for the grapple cylinder too. Thanks for the advice!