PTO gear pump mounting question

elliskev2 · Sep 16, 2022

Hello ALL,
I have a rookie question. I have a Prince PTO mounted hydraulic pump for a 3pt backhoe and was wondering if this needs to be positioned upright while on the PTO shaft?
I am trying to make a torque arm setup because it didn't come with one. There was no paper work or information on the backhoe when I acquired it earlier this summer. Seems to me it wouldn't make a difference but wanted to check with some experts.
Thanks.

TractorTech · Sep 16, 2022

It does not have to be absolutely upright. If it has a vent on top, you can let it angle 10-20 deg of center.

elliskev2 · Sep 17, 2022

Thank you Sir.

5030 · Sep 17, 2022

Never seen a pto pump with a vent but anything is possible. The important part is the torque arm or chain as the case may be.

elliskev2 · Sep 17, 2022

No vent on this one either but It did swing around and was upside down on the pto shaft while I was fitting a piece of angle iron for the torque arm. That's when my question came up.
All set though I have it upright and the torque arm is right down on the tractor hitch frame.
Thanks guys.

ptsg · Sep 17, 2022

It's just a gear pump. There are no vents on pumps. As long as it's spinning the right way, it won't care if it's up or down.

Now if it was a setup like on the picture below, that would matter but you could also change the vent on the speed increaser as needed.

TractorTech · Sep 17, 2022

ptsg said:
It's just a gear pump. There are no vents on pumps. As long as it's spinning the right way, it won't care if it's up or down.

Now if it was a setup like on the picture below, that would matter but you could also change the vent on the speed increaser as needed.

View attachment 762987

On the gearbox, not the pump. That is a vent on top of the gearbox and that is what needs to be at the top. Thanks for illustrating my point! That was the general question of mounting it as the pump is integral with the gearbox.
The site glass and/or plug on the side of the gearbox can be traded for the vent as well. Sorry that I was generalizing "PTO pump vent"

ptsg · Sep 17, 2022

TractorTech said:
On the gearbox, not the pump. That is a vent on top of the gearbox and that is what needs to be at the top. Thanks for illustrating my point! That was the general question of mounting it as the pump is integral with the gearbox.
The site glass and/or plug on the side of the gearbox can be traded for the vent as well. Sorry that I was generalizing "PTO pump vent"

I believe and accordingly to the picture on the first post, the OP is using this style of PTO pump (image below) without the gearbox. The entire thing is the pump itself.

kthompson · Sep 17, 2022

Not your question but be sure you have a good heavy arm to hold the pump from turning. Much more torque on it than a sprayer pump. No comparison on the pressure between the two.

TractorTech · Sep 17, 2022

ptsg said:
I believe and accordingly to the picture on the first post, the OP is using this style of PTO pump (image below) without the gearbox. The entire thing is the pump itself.

View attachment 763004

Indeed, I believe you are right. Hard to tell from picture, but he did say it was a Prince. Your picture though does have the vent. Anyway, this pump can be mounted any position.