Third function circuit with backhoe

PAshooter

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L2850 LA650 Bradco 8MD2 Woods RD6000 B7300 LA271 RCK54-24B 48" Befco
Sep 27, 2020
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Recently repaired a L2850 with LA650 FEL. I installed a two way single spool valve for use with bucket grapple. Pump line from tractor supplies FEL valve,Power beyond from FEL valve supplies third function valve. I have third function valve tee'd into return to tank line with FEL valve, and Power beyond from third function running back to tractor. This setup is working well so far. I do not have PTO function for three point hitch, which I believe this is the way system should operate. I want to hook up my Bradco 8M2D backhoe. My question is can I plug into circuit downstream from third function valve or should I plug in after FEL valve?Do I need to Tee Power beyond line?
 

lugbolt

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ZG127S-54
Oct 15, 2015
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someone correct me if i'm wrong....

Normally it will be Tractor hyd outlet block---->FEL---->backhoe--->3ph. 3rd function will go inline with the loader power beyond. In doing so you can't use a function beyond the 3rd function AND the 3rd function at the same time. It's one or the other but who's gonna be using the 3ph and 3rd function simultaneously?

but it'll depend on how your BH is setup too, there should be a set of destructions available for it to help you along.
 

PAshooter

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Premium Member

Equipment
L2850 LA650 Bradco 8MD2 Woods RD6000 B7300 LA271 RCK54-24B 48" Befco
Sep 27, 2020
11
1
3
PA
someone correct me if i'm wrong....

Normally it will be Tractor hyd outlet block---->FEL---->backhoe--->3ph. 3rd function will go inline with the loader power beyond. In doing so you can't use a function beyond the 3rd function AND the 3rd function at the same time. It's one or the other but who's gonna be using the 3ph and 3rd function simultaneously?

but it'll depend on how your BH is setup too, there should be a set of destructions available for it to help you along.
That makes sense to me. Backhoe only has two lines and there is no mention in manual about a return to tank line. Only supply and return. Im guessing that because 3rd function has bypass valve to tank correct? So my line that would run from FEL to hyd block will now feed backhoe and return line from backhoe will now supply 3rd function and 3rd funtion power beyond line will return to hyd block?
 

TheOldHokie

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Apr 6, 2021
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windyridgefarm.us
That makes sense to me. Backhoe only has two lines and there is no mention in manual about a return to tank line. Only supply and return. Im guessing that because 3rd function has bypass valve to tank correct? So my line that would run from FEL to hyd block will now feed backhoe and return line from backhoe will now supply 3rd function and 3rd funtion power beyond line will return to hyd block?

You should not feed another valve with the tank return on the backhoe valve. Add the hoe after the third function.

Third function power beyond would feed backhoe and backhoe would return to hydraulic block in place of third function.

When hoe is removed loop backhoe lines together and its same as your current plumbing.

Dan
 
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PAshooter

New member
Premium Member

Equipment
L2850 LA650 Bradco 8MD2 Woods RD6000 B7300 LA271 RCK54-24B 48" Befco
Sep 27, 2020
11
1
3
PA
You should not feed another valve with the tank return on the backhoe valve. Add the hoe after the third function.

Third function power beyond would feed backhoe and backhoe would return to hydraulic block in place of third function.

When hoe is removed loop backhoe lines together and its same as your current plumbing.

Dan
Thank you sir! I hooked her up after third 3rd function, works like a charm and no UDT shower!