Help specing a hydraulic motor.

[jeff77indy]

I am contemplating a remodel of my 3 pt hitch concrete mixer to mount on my FEL using a quick attach.
What size of hydraulic motor would run this if mounted as stated and ran off either the rear remotes or possible a set of add on electric remotes?
The mixer is a chain drive off the PTO shaft.

Thanks
Jeff

 

[J_J]

dfkrug has done this. Here is the link.

http://www.tractorbynet.com/forums/hydraulics/152388-converting-3-pt-concrete-mixer.html

 

[radman1]

These charts will get you started. Need to know the hydraulic flow of you tractor. The hydraulic psi will help determine the hp/torque.
Hydraulic

If you are using a chain and sprockets, then you will need to calculate the speed based on sprocket sizes. That is another whole level of calcualtions. If your current drum is run off the pto, then you know the motor speed will be up to 540 rpm. You will probably need a variable rate flow control if you need to change the speed of the motor.Surplus Center - SAE 12 HYD FLOW CONTROL VALVE RD112-30

Something like this may work if you use a pto now. Surplus Center - 6.15 CU IN PTO DRIVE MOTOR

 

[jeff77indy]

Thanks for the replies and links.
The mixer I have is similar to the one dfkrug converted. So some of his calculation should work.
This will be going on my 4110 Mahindra and plan on mounting it to a bobcat type quicktach made up so the mixer can be removed and put back on the 3pt hitch and pto drive if needed.
So the hydraulic motor will be attached to the same shaft that a pto shaft would be hooked to. Not sure if I will use my rear remotes or install a electronic set of remotes.
Again thanks.

 

[jeff77indy]

Would anyone have the specs on this Vickers HTLS motor?

P/N HMA-2096-AWO-10 1" keyed shaft, two hole flange mount.

I can't find anything by searching.

Thanks
Jeff

 

[dfkrug]

Would anyone have the specs on this Vickers HTLS motor?

When trying to get specs for existing motors, or ones I am considering
buying, I first try to get the maker's PDF catalog. Since many listings
do not have the product ID, I have also been able to email the maker
and get specs when necessary.

My experience has shown that Char-Lynn S motors are inexpensive and
common, and the maker is helpfull. The catalogs and part #s are very
hard to decode, however. This in one reason I often look for White hyd
motors.

If you want to switch back-and-forth betw hyd motor drive and PTO
drive, you just need to buy or make the right coupling. That also
means that you have to get the correct displacement motor for the speed
you want; you can not further adjust the speed with different sprockets
like I did.

 

[J_J]

https://www.surpluscenter.com/item.asp?item=9-7368-100&catname=hydraulic

This is the one that radman1 posted above, and you can vary the speed of the motor by changing engine rpm. If you need to reverse the tub direction, get a motor spool valve with detents.

 

[jeff77indy]

This motor was a surplus we have at work and was just wondering as it is faifly old and does not show in a search on the Vickers site.

Thanks for the link for the surplus center motor.

I need to get a count on the drive sprockets for my mixer then do some figuring.
Making a coupler isn't a problem, if I can't do it here I can at work. The PTO shaft is pined to the mixer input shaft so the coupler would be pretty straight forward.

 

[J_J]

That motor has 6 splines, 1 3/8 in shaft and should connect directly to a PTO shaft.

 

[radman1]

Surplus center also sells 6 spine, 1 3/8" pto shafts that will fit on a 1" keyed shaft. That works well if you already have a hydraulic motor that only has a keyed shaft which is much more common.

 

[jeff77indy]

dfkrug; How were you able to obtain your tractors pump flow rate at idle, is is stated somewhere or is there a way of calculating it?

My mixer has a 10:1 reduction using a chain and sprocket drive off the PTO shaft input.
I plan on connecting the hydraulic motor to the mixer input shaft which is drilled for a shear pin with a collar that is keyed for the hydraulic motor output shaft and drilled for the mixer input shaft.

Thanks
Jeff

 

[dfkrug]

How were you able to obtain your tractors pump flow rate at idle, is is stated somewhere or is there a way of calculating it?

Jeff, your implement pump is rated at the 540 PTO engine speed, so if that is
say 2200RPM, you get half that flow rate at 1100 RPM. The relationship is
linear, so you can calculate the flow rate at any RPM, if you use the
spec for your pump.

In my case (Kioto CK30), you can only get the spec (8.3GPM) from
the service manual.

I assume you are using the Mahindra for this effort. Note that even at
idle engine speed, these PTO mixers run a bit too fast, in my experience.
You can correct that if you choose a hyd motor displacement that slows
things down a bit.

 

[jeff77indy]

Thank you Sir, I was thinking along that line but was unsure about the gpm being linear across
the engine rpm spectrum.

So I'm looking at roughly 3 GPM at the 800 RPM idle speed of my 4110.

Again thanks.

Jeff

 

[dfkrug]

Thank you Sir, I was thinking along that line but was unsure about the gpm being linear across
the engine rpm spectrum.

Happy to assist.

Since I mix thick mud, a slow-turning drum is very important. My mixer
works very well. One upgrade I was considering is to remove the paddles
and add blades like the big mixers have. This would allow me to eject
the mud better when you reverse the rotation.