Hydraulic pump with through shaft

[Hugo Habicht]

Hello,

are there hydraulic pumps available where the shaft being driven comes out the other side? Could be female spline as well.

I looked for "hydraulic pump dual shaft" or "hydraulic pump through shaft" but very little came up. Found a few PTO pumps but their speed was too slow. So what are those pumps being called?

Or can it be successful drilling a hole in the rear lid, adding a seal and bringing the shaft through?

Or I thought of buing a dual pump and removing the second pump section assuming there is a seal between the two hydraulic sections.

Kind regards,
Hugo

 

[TheOldHokie]

Hello,

are there hydraulic pumps available where the shaft being driven comes out the other side? Could be female spline as well.

I looked for "hydraulic pump dual shaft" or "hydraulic pump through shaft" but very little came up. Found a few PTO pumps but their speed was too slow. So what are those pumps being called?

Or can it be successful drilling a hole in the rear lid, adding a seal and bringing the shaft through?

Or I thought of buing a dual pump and removing the second pump section assuming there is a seal between the two hydraulic sections.

Kind regards,
Hugo

Unless you are an accomplished machinist I dont think you are have oing to modify a basic gear pump. Whats the application?

Dan

 

[MOOTS]

Hello,

are there hydraulic pumps available where the shaft being driven comes out the other side? Could be female spline as well.

I looked for "hydraulic pump dual shaft" or "hydraulic pump through shaft" but very little came up. Found a few PTO pumps but their speed was too slow. So what are those pumps being called?

Or can it be successful drilling a hole in the rear lid, adding a seal and bringing the shaft through?

Or I thought of buing a dual pump and removing the second pump section assuming there is a seal between the two hydraulic sections.

Kind regards,
Hugo

Some zero turn mowers had a stacked setup on the pumps. Toro we had at work was like that. There was no seal between the pumps, they were sealed independently. Only a short “jumper” hose connecting the two.
Front pump with pulley was male, backside female, second pump; only male.

Found a picture.

 

[Hugo Habicht]

Unless you are an accomplished machinist I dont think you are have oing to modify a basic gear pump.

The seals on the pump shafts look fairly simple. I always thought there would be fairly pressure on it, but the leakage from the gears must be low enough. I would prefer to buy one ready made but would not hesitate to modify one.

Whats the application?

Hydraulic pump for my tractor. It has an auxiliary pump for lifting the deck and three point hitch but flow and more importantly pressure is too low.

I thought of adding a pump at the input shaft of the hydrostatic drive. I could also add it at the front of the engine at the flywheel but the routing of the hydraulic lines would be better if the pump is towards the centre or back of the tractor.

The engine drive shaft is routed through the hydrostatic drive and the auxiliary pump but the rear PTO gearbox is connected to that.

 

[Fedup]

Not to be nosy here, but it seems to me if you mentioned what tractor you have and maybe some photos of what you have now along with your description of what you hope to find you might get better results.

 

[North Idaho Wolfman]

Not to be nosy here, but it seems to me if you mentioned what tractor you have and maybe some photos of what you have now along with your description of what you hope to find you might get better results.

His profile tells you he has a G1900.

 

[North Idaho Wolfman]

The seals on the pump shafts look fairly simple. I always thought there would be fairly pressure on it, but the leakage from the gears must be low enough. I would prefer to buy one ready made but would not hesitate to modify one.



Hydraulic pump for my tractor. It has an auxiliary pump for lifting the deck and three point hitch but flow and more importantly pressure is too low.

I thought of adding a pump at the input shaft of the hydrostatic drive. I could also add it at the front of the engine at the flywheel but the routing of the hydraulic lines would be better if the pump is towards the centre or back of the tractor.

The engine drive shaft is routed through the hydrostatic drive and the auxiliary pump but the rear PTO gearbox is connected to that.

Let's clear up one detail, you technically do not have a hydraulic pump at all, you have and HST and they are using that for the hydraulics.

A Hydraulic pump with in and out will be costly, and honestly a fool's errand to try and put that in line with the HST.
Mounting it would be a real pain in the backside.

I need a better picture of this area right here.
You MIGHT be able to mount a pump there, the Fuel cam has the provision to run a pump.

 

[Hugo Habicht]

Let's clear up one detail, you technically do not have a hydraulic pump at all, you have and HST and they are using that for the hydraulics.

Well, yes, there is a feeder pump for the HST called auxiliary pump which they use for the (limited) hydraulics. And yes, we agree, it is not suitable to run anything else from it.

A Hydraulic pump with in and out will be costly, and honestly a fool's errand to try and put that in line with the HST.
Mounting it would be a real pain in the backside.

Thank you for your advice, I am sure everything you say is correct, as always, and I know that myself. I never said it will be easy.

You MIGHT be able to mount a pump there, the Fuel cam has the provision to run a pump.

Thank you very much for the hint, did not know that and will look into it.

My original question does not aim at how and where to install such a pump but to find a suitable pump the first place. There are plenty generic hydraulic pumps around but I just cannot find one with the shaft going through, apart from PTO pumps which are not suitable.

So how do you call those pumps? What search words do I have to use to find them on the internet?