1992 kubota l5450 I cant use the front loader at the same time with brush hog. I can turn the control valve under the tractor and make one work and switch it to make the other work but can’t get both work together. I think it’s just my ignorance but would appreciate any help. Thanks!
Can’t run front loader and brush hog together
- Thread starter Walkintall9000
- Start date
torch
Well-known member
Equipment
B7100HSD, B2789, B2550, B4672, 48" cultivator, homemade FEL and Cab
Do you mean you can't raise and lower the bush hog with the 3ph or the PTO won't spin the bush hog?
How many hoses connect to your loader valve? 6 or 7
Looking at the parts illustration it appears to me that for your model Kubota chose to keep the hydraulic system simple hence the hydraulic selector valve as you have discovered. Loader works or 3 pt hitch work but not both at the same time.
If your loader valve has 7 hoses it will have what is called Power Beyond and with PB there are more options to alter the system.
Dave
Looking at the parts illustration it appears to me that for your model Kubota chose to keep the hydraulic system simple hence the hydraulic selector valve as you have discovered. Loader works or 3 pt hitch work but not both at the same time.
If your loader valve has 7 hoses it will have what is called Power Beyond and with PB there are more options to alter the system.
Dave
The pto spins but the arms won’t lift unless I switch the valve underneath the tractor, but then I can’t use the front loader, it won’t raise!
torch
Well-known member
Equipment
B7100HSD, B2789, B2550, B4672, 48" cultivator, homemade FEL and Cab
Ok, so it must be as Dave said -- that is how Kubota designed it. There have been a couple of threads on this topic recently. It might be possible to tap into the hydraulic system at the pump to re-work things even if your tractor does not have a hydraulic block (or equivalent), but your loader control would have to have a Power Beyond port or you would have to change out the controls for one that does.
Have a read through this:
www.orangetractortalks.com
and this:
www.orangetractortalks.com
They reference different models than yours but offer some good insights.
Have a read through this:
No hydraulics after using PTO
Hi All I bought a B7100 a month back and its been a bit of a learning curve with being my first tractor. The last owner really neglected maintenance but the price was right so I took the plunge. So far I ve had the two front hydraulic rams for the loader reconditioned. Installed them and...
www.orangetractortalks.com
and this:
B6100 front end loader hydraulics
I picked up a b6100 a week or so ago and want to add a front end loader on it. I plan to build it myself and have a few questions. Number one is what kind of lift capacities an I expect? Second is do will the pump off the back of the injection pump run a loader? No need to be fast but need it to...
www.orangetractortalks.com
They reference different models than yours but offer some good insights.
It does have seven hoses going into the front loader control valve!
Thanks for all your help!Ok, so it must be as Dave said -- that is how Kubota designed it. There have been a couple of threads on this topic recently. It might be possible to tap into the hydraulic system at the pump to re-work things even if your tractor does not have a hydraulic block (or equivalent), but your loader control would have to have a Power Beyond port or you would have to change out the controls for one that does.
Have a read through this:
No hydraulics after using PTO
Hi All I bought a B7100 a month back and its been a bit of a learning curve with being my first tractor. The last owner really neglected maintenance but the price was right so I took the plunge. So far I ve had the two front hydraulic rams for the loader reconditioned. Installed them and...
and this:
B6100 front end loader hydraulics
I picked up a b6100 a week or so ago and want to add a front end loader on it. I plan to build it myself and have a few questions. Number one is what kind of lift capacities an I expect? Second is do will the pump off the back of the injection pump run a loader? No need to be fast but need it to...
They reference different models than yours but offer some good insights.
torch
Well-known member
Equipment
B7100HSD, B2789, B2550, B4672, 48" cultivator, homemade FEL and Cab
Looking at the parts diagram on Kubota.ca for the L5450DT (the only model I can find there) I think you have a hydraulic block with integral bypass valve NOT a diverter valve. In one position, it supplies fluid only to the 3ph. In the other position, rotated 90°, it supplies fluid to the FEL control valve instead BUT the FEL should return the fluid (through that 7th hose) to the hydraulic block when in the neutral position. Does your valve look like this, but with hoses to the FEL control in place of the pipe plugs labelled "070"?
Looks like it would be located on the right side of the tractor:
It looks like it takes it's supply from a power steering priority valve?
Looks like it would be located on the right side of the tractor:
It looks like it takes it's supply from a power steering priority valve?
Looking at the parts diagram on Kubota.ca for the L5450DT (the only model I can find there) I think you have a hydraulic block with integral bypass valve NOT a diverter valve. In one position, it supplies fluid only to the 3ph. In the other position, rotated 90°, it supplies fluid to the FEL control valve instead BUT the FEL should return the fluid (through that 7th hose) to the hydraulic block when in the neutral position. Does your valve look like this, but with hoses to the FEL control in place of the pipe plugs labelled "070"?
Looks like it would be located on the right side of the tractor:
It looks like it takes it's supply from a power steering priority valve?
Yes that looks like what I have! I asloLooking at the parts diagram on Kubota.ca for the L5450DT (the only model I can find there) I think you have a hydraulic block with integral bypass valve NOT a diverter valve. In one position, it supplies fluid only to the 3ph. In the other position, rotated 90°, it supplies fluid to the FEL control valve instead BUT the FEL should return the fluid (through that 7th hose) to the hydraulic block when in the neutral position. Does your valve look like this, but with hoses to the FEL control in place of the pipe plugs labelled "070"?
Looks like it would be located on the right side of the tractor:
It looks like it takes it's supply from a power steering priority valve?
Noticed it has one hose from that valve that has a quick coupler on it that’s just hanging there going to nothing.
I’m wondering if maybe two hoses have to be switched when using a brush hog. The fitting is all rusted so I will have to get one to replace it with to even try it. I really do
appreciate y’all’s help!
torch
Well-known member
Equipment
B7100HSD, B2789, B2550, B4672, 48" cultivator, homemade FEL and Cab
What are the chances that the loose coupler has (or had) a mate attached to the hydraulic block? That could explain everything.
I would have to switch it with a hose on the loader. I don’t know what it would be for just hanging there. As I said I think it’s just my ignorance! Lol
torch
Well-known member
Equipment
B7100HSD, B2789, B2550, B4672, 48" cultivator, homemade FEL and Cab
Ok, there should be 4 hoses from the FEL control valve to the loader (raise, lower, curl, dump). There probably should be one hose from the hydraulic block to the FEL control valve P (pump) port, one from the PB (power beyond) port back to the hydraulic block and one from the T (tank) port back to the sump.
If I was a betting man, I would be looking at that PB line. I wonder if someone had a third function plumbed in at one time. If the PB line is plugged off with a loose quick-connect, it could explain things. If that is the case, fluid cannot flow through the FEL control valve. It would simply be dumped back to the tank through a built-in relief valve.
I'm just speculating here, mind you. I can't see your tractor and don't have access to a manual for your tractor. I'm making educated guesses based on how other, similar, tractors work. Photos and/or diagrams could be helpful.
If I was a betting man, I would be looking at that PB line. I wonder if someone had a third function plumbed in at one time. If the PB line is plugged off with a loose quick-connect, it could explain things. If that is the case, fluid cannot flow through the FEL control valve. It would simply be dumped back to the tank through a built-in relief valve.
I'm just speculating here, mind you. I can't see your tractor and don't have access to a manual for your tractor. I'm making educated guesses based on how other, similar, tractors work. Photos and/or diagrams could be helpful.
I think your on to something and I’m going to try that and will let you know. Like I said the old fitting is all rusted so it’s going to have to be replaced or cleaned up. Thanks again for all your help!
Dave the FEL has seven hoses to it. One hose coming off the the junction block under the tractor, number four outlet port goes to a dead end male quick disconnect just hanging and not hooked to anything. Any ideas? Thanks for all your help!
torch
Well-known member
Equipment
B7100HSD, B2789, B2550, B4672, 48" cultivator, homemade FEL and Cab
Ok I got it figured out, I had to turn the junction block valve to the closed position and the line coming out of port 4 (outlet) that was just blocked off and hook it into the power feed for the backhoe out of the FEL control valve to charge the outlet line to the lift arms. Thanks for everyone’s help! I hope I explained that correctly! Lol
torch
Well-known member
Equipment
B7100HSD, B2789, B2550, B4672, 48" cultivator, homemade FEL and Cab