L-39 Hydraulic Pumps, Number and Flow

[catvet]

I'm probably crazy (my wife would say get rid of the Probably) but I seem to remember that the L-39 has multiple hydraulic pumps (three if my memory serves correctly). Some one at the dealership said that wasn't the case.

Any info appreciated. If there are multiple pumps anyone know the flows?

 

[MadReferee]

According to the literature I have, the L39 has 3 pumps, one for the backhoe and implements @ 11 gpm, one for the power steering @ 6.2 gpm and one for the boom swing @ 6.2 gpm. This info is also available on the Kubota website. Your dealer's employees need additional education/training.

 

[catvet]

Thanks Mad,
That was the information I was looking for. For some reason I couldn't find that on Kubota's website.

 

[Muleskinner]

Unlike the L48, the L39's pumps are encased inside of the transmission housing area. The L48 has a pump that is in front under the radiator and it is driven by the crankshaft. The L39's pump capacity is almost the same as the L48.

 

[witel]

I spoke with a dealer at the end of 2006 about the L39 and my potential hydraulic uses. I'm not an expert by any means on the L39 hydraulics nor even the possible configurations; however, it was clear that the dealer knew less than me. So, I'm going to attempt to breathe life back into this thread in hopes of getting some more details regarding the L39 hydraulics.

Let's remove the 6.2 gpm power-steering pump from the equation, and we're left with (quoting the L39 brochure) the 6.2 gpm for the "backhoe boom swing" and the 11 gpm for the "loader/backhoe". Can anyone elaborate on these a bit more?

Is the 11 gpm pump used for the front (FEL) remote hydraulics as well as the rear (backhoe) remote hydraulics? If so, do the remotes "steal" flow from the rest of the FEL/Backhoe functionality?

Is the 11 gpm pump tapped into for the TNT?

Is the 6.2 gpm truly only for the backhoe boom swing?

I want to mount a hydraulic PHD on the backhoe dipper-stick, and want to ensure a dedicated 11 gpm (10+) gets to it in order for it to be more effective. Is this a do-able configuration?

These may be ridiculous sounding questions, but I'm learning.

 

[MadReferee]

Is the 11 gpm pump used for the front (FEL) remote hydraulics as well as the rear (backhoe) remote hydraulics? If so, do the remotes "steal" flow from the rest of the FEL/Backhoe functionality?

Yes. However, remember that valves are in series. When only one is activated it has the full use of any flow in the circuit. If more than one is activated simultaneously the first one in the series circuit will have the advantage of the full flow. Valves after that one will get some flow depending on the design of the first valve. No valve "steals" from another.

Is the 11 gpm pump tapped into for the TNT?

Yhe valves for the remotesthat are used for the TNT are in the same 11 gpm series circuit as the loader.

Is the 6.2 gpm truly only for the backhoe boom swing?

I believe so since it is it's own seperate pump.

I want to mount a hydraulic PHD on the backhoe dipper-stick, and want to ensure a dedicated 11 gpm (10+) gets to it in order for it to be more effective. Is this a do-able configuration?

Sure. It all depends on how and where you hook up the PHD and that you have no other hydraulic valves activated in that circuit when the PHD is in operation.

 

[witel]

Thanks. I think I am following you. I just don't want my PHD to lose it's umph while pushing it into the ground.

 

[art]

Kubota builds a hydraulic boom kit for adding hydraulics to the hoe. Kubota built it to run a 300lb hammer off the hoe. I've used it to add hydraulic drive augers before in place of the bucket and it works fine. The kit is #BTB404 and in the book retails at 1,545. A good auger is worth the most here.

 

[witel]

That is exactly what I had in mind.

The BTB404 Remote Valve Kit includes a right foot operated valve, hoses, pipes, and brackets ... according to the information that I have.

 

[art]

To have the right auger drive head as there are several types and the right diameter auger and your all set! I normally for NY use a auger that is for frozen ground and or blacktop do to the variations in conditions.