Backhoe backhoe hydraulic power

guyrj33 · Oct 18, 2005

Where are your backhoe hydraulics conncected?
On my B7800 my Woods backhoe is connected to the 3pt hitch hydraulics. I don't have as much speed moving the backhoe as I would like. Can't raise boom and curl in the arm at the same time.
Dealer has checked and said it's normal?
Any opinions?

CTyler · Oct 18, 2005

I have a Woods 9000 on a L3130 using a remote and everything works ok. Sounds like you may be on the low side of the hydraulic flow requirement.

For example if my tractor is idling I can't lift the boom and curl the bucket at the same time. The bucket doesn't move, or doesn't appear to move, until the boom is up. The fluid takes the path of least resistance.

ronjhall · Oct 18, 2005

What RPM's are you running tractor when operating the BH? My Kubota BH will only run one cylinder at a time below 2000 RPM's.

wushaw · Oct 18, 2005

( Where are your backhoe hydraulics conncected?
On my B7800 my Woods backhoe is connected to the 3pt hitch hydraulics. I don't have as much speed moving the backhoe as I would like. Can't raise boom and curl in the arm at the same time.
Dealer has checked and said it's normal?
Any opinions?
)

If your trying to raise the boom.. curl the bucket & bring in the dipper arm then no it won't happen...not three things at once, maybe on larger units.
I have noticed on my BH75 it doesn't like doin three things at once.

countrybumpkin · Oct 18, 2005

Mine are ran off a separate PTO pump. If you want to do severel things at once it depends on the Gpm of the pump. Some put out around 12 GPM at a given pressure and I've seen some that can put out about twice that at the same pressure.

guyrj33 · Oct 19, 2005

I'm running at full recommended rpm for implements, don't remember the exact number.
I'm only trying to do 2 things at once one on each joy stick.
Say lift the boom and bring in the arm, one will complete then the other will move. If I very verly lightly feather the controls I can move both at once.
I think the dealer should have sold me a pto driven pump with this backhoe.

tawilson · Oct 19, 2005

Sounds like it's working like it's supposed too. My uneducated opinion is, when giving a control lever full throttle, the first one in the series will get the power. That's why the swing motion is so fast and difficult to control. I repeat, this is my opinion from using my bh, I don't know for a fact.

CTyler · Oct 19, 2005

You need more flow is all, I do multiple functions all the time. One function at a time would just be slow, frustrating and uproductive to me. If my tractor did not have enough flow to do at least two functions at the same time I'd get a PTO pump that would.

guyrj33 · Oct 19, 2005

I will get a PTO pump if that will solve the problem. Just want to know ahead of time that adding a pump will change the way the backhoe works.
The kubota and Woods specs seem to incidate enough flow, yet both Woods and Kubota seem to favor using a PTO pump.
When I can find the time I'm going to go back to the dealer and drive another B7800 with backhoe.

Skidmark25 · Oct 19, 2005

I have B7610 with a Woods BH6500 - run off of the tractor hyd system no separate pump.

At lower RPMs the BH hydraulics are sluggish, I must say that i am not good enough yet to do 3 movements at once but I can operate the boom/curl/dipper any 2 combinations of the 3 without a problem.

BUT I can't swing & operate any other motion simultaneously I thought this was a safety feature and I don't really have any need to operate the swing & another motion simultaneously so I was never really concerned.

countrybumpkin · Oct 19, 2005

Don't forget you can't just add a PTO pump. You will need a Reservoir to hold the fluid, And it will need to hold enough for the system to work.

ronjhall · Oct 19, 2005

The standard PTO pump supplied by Kubota and Woods has a Output of 6 GPM.
Your tractors hydraulics has a output of 6.4 GPM. Unless you get a larger pump than standard you will not see a increase in speed. To install a PTO pump you will also need a reservoir for pump to suck oil from.
One item that I have not seen mentioned here, is 3PH fully lowered or bypassed on your tractor?

MadReferee · Oct 19, 2005

How are the backhoe outlets plumbed? It should be plumbed so that the backhoe inlet comes off the loader's power beyond and the backhoe outlet goes back into the circuit.

Do you have to jumper the backhoe connectors on the tractor together when the backhoe is not connected? If plumbed as above then you must have to jumper.

Is the 3pt lowered (as it should be) or raised?

You only have so much flow. The bh valve design will go a long way in determining which function has flow priority.

wushaw · Oct 19, 2005

I gonna have to get my memory checked /forums/images/graemlins/frown.gif
I was wrong about not doing three things at once, I can curl the bucket, bring in the boom and dipper arm in all at the same time just not real quick.
The Madref is right about the plumbing, it should go through your loader valve.

MadDog · Oct 19, 2005

I have a B7800 and Woods 7500 BH with PTO pump. My dealer advised getting the PTO pump rather than connecting to the tractor hydraulics and I think he was right.

I have no problem controling 3 functions simultaneously and have not found that I have to run the engine at high RPM in order to get reasonable responsiveness. If I ever get expert enough with the BH to think it is too slow, I guess I can run at higher RPM, which will increase the PTO pump output.

CTyler · Oct 19, 2005

( Is the 3pt lowered (as it should be) or raised? )

Hmmm...good point, I must have blew right past the 3pt hookup. Mine is connected to a remote. Does the 3pt restrict flow?

Cuda · Oct 20, 2005

My BH is PTO pump powered. I've often operated it at idle engine speed when working close to the house or near something that can easily be damaged. Usually has enough power to get the job done but it's just slow going.
Having the BH w/PTO pump setup has been good thing for me. /forums/images/graemlins/laugh.gif

(B2710 & BL4690B)

guyrj33 · Oct 24, 2005

I was told the backhoe is plumbed off the 3pt hitch, and that I have to connect the hoses on the tractor together if I remove the backhoe.
I'm aware that a PTO pump would reqire a tank etc.

MadReferee · Oct 24, 2005

( I was told the backhoe is plumbed off the 3pt hitch, and that I have to connect the hoses on the tractor together if I remove the backhoe. )

Not technically true about plumbed off the 3pt hitch . For your configuration, the hydraulic circuit was broken after the loader but before the 3pt. The inlet of your backhoe is actually plumbed off the loader's power beyond outlet and your backhoe's outlet is plumbed back into the circuit before the 3pt.

That is why you have to jumper the connections when you remove the backhoe, otherwise the 3pt will never work and the pump will stall out and probably fail because you no longer have a closed loop for the fluid to travel from the pump back to the reservoir tank.