Axial Pump ID and Locate Similar Replacement

[aroz49]

Good morning peterbuilt84.
To date I have not found any replacement pumps and have put this project on the back burner. I will get back to it probably during the winter months. Here is what I have learned so far: the two main pumps that are attached to the 20 HP Kohler gas engine in tandem were made by Axial Pump which was a Comer Group Company (Comer Industries.com). This company was bought out or merged with the much large company called Poclain (Poclain Hydraulics) (PH). My guess is that Poclain probably still makes or sells these pumps under their name (or a very similar pump) but I have not investigated any further to determine a model number, availability, price etc. As J_J mentioned displacement will be important to match up a replacement pump and I will follow that advice.

Now for the third pump, the PTO (auxiliary hydraulics pump) which is attached last after the two above pumps, I have learned that it was made by an Italian company called: Casappa Italy aka Casappa Fluid Power Design. Don't know the exact model number either. I believe that the Surplus Center will have a similar replacement pump for little money for this application, but I have to purchase the two main pumps first to make sure that they all mate up properly.

This is all the info I have gathered so far. Have not purchased any replacement pumps yet but am always looking. I do not have the old ones to use as examples. I am totally new to hydraulics but learning quickly.

Hope the above info helps a bit. Good luck. aroz49

 

[peterbuilt84]

J.J,
Thank you so much for the information. I can tell you probably have forgotten more on hydraulics then I will ever learn! LOL I know just enough to be dangerous. That being said I had a couple ?'s on the variable pump. My pumps have 4 hoses attached to each unit. This pump you sent also has 4 ports. Can I assume 2 are for power & 2 are for control? This unit looks to have a mechanical arm for manual control? In my case would I be fine to just use the hydraulic control if that's correct? Appreciate your input and any insight you may have. Thankyou

 

[peterbuilt84]

These pumps are similar to the ones on my Power-Trac.

You have to know the total displacement to figure the HP requirements.


1.24 cu in. VARIABLE PISTON PUMP EATON 70160REN03


0.84 CU IN EATON 25302 LAH HYD PUMP

Surplus Center

J.J,
Thank you so much for the information. I can tell you probably have forgotten more on hydraulics then I will ever learn! LOL I know just enough to be dangerous. That being said I had a couple ?'s on the variable pump. My pumps have 4 hoses attached to each unit. This pump you sent also has 4 ports. Can I assume 2 are for power & 2 are for control? This unit looks to have a mechanical arm for manual control? In my case would I be fine to just use the hydraulic control if that's correct? Appreciate your input and any insight you may have. Thankyou

 

[peterbuilt84]

Good morning peterbuilt84.
To date I have not found any replacement pumps and have put this project on the back burner. I will get back to it probably during the winter months. Here is what I have learned so far: the two main pumps that are attached to the 20 HP Kohler gas engine in tandem were made by Axial Pump which was a Comer Group Company (Comer Industries.com). This company was bought out or merged with the much large company called Poclain (Poclain Hydraulics) (PH). My guess is that Poclain probably still makes or sells these pumps under their name (or a very similar pump) but I have not investigated any further to determine a model number, availability, price etc. As J_J mentioned displacement will be important to match up a replacement pump and I will follow that advice.

Now for the third pump, the PTO (auxiliary hydraulics pump) which is attached last after the two above pumps, I have learned that it was made by an Italian company called: Casappa Italy aka Casappa Fluid Power Design. Don't know the exact model number either. I believe that the Surplus Center will have a similar replacement pump for little money for this application, but I have to purchase the two main pumps first to make sure that they all mate up properly.

This is all the info I have gathered so far. Have not purchased any replacement pumps yet but am always looking. I do not have the old ones to use as examples. I am totally new to hydraulics but learning quickly.

Hope the above info helps a bit. Good luck. aroz49

Aroz49

Thanks for the additional information and that does answer a few questions. I feel it only right to let you know what I found too. I contacted TMX and asked them a few questions and they were very helpful. (Guys name was Wally) Company was bought out in 2006 . Since being bought they have went to pumps they get in Iowa.(He wouldn't tell me manufacturer but I understand that) They have went to more electrically activated controls for their hydraulics to lessen the amount of hoses. That being said he said he could sell me a complete conversion(pumps,controls reservior) package for around 6500.00 .LOL Knowing I would price my self right out of the neighborhood, I asked him about a smaller package. He said he could sell me the pumps & adaptor Plate (on the motor) for around 3,000.00+ . The only thing I would have to do is retrofit the hoses to fit. Still a little pricey with a lot of work. J.J. put me on to a couple of pumps for about half that amount if they will work for our system.(a few posts back) I'm still confirming they will work. Look forward to anything you have or anything I can share. Thank you sir!!

 

[SSdoxie]

J.J,
Thank you so much for the information. I can tell you probably have forgotten more on hydraulics then I will ever learn! LOL I know just enough to be dangerous. That being said I had a couple ?'s on the variable pump. My pumps have 4 hoses attached to each unit. This pump you sent also has 4 ports. Can I assume 2 are for power & 2 are for control? This unit looks to have a mechanical arm for manual control? In my case would I be fine to just use the hydraulic control if that's correct? Appreciate your input and any insight you may have. Thankyou

The 4 ports on the pump are: 2 are the work outlet ports. The one on top at rear is suction inlet for the charge pump built into the back of the pump and the 4th (top front) on the case is Case Drain going back to tank or cooler.

 

[J_J]

2 Work ports SAE 12
Charge Inlet Port SAE 8
Auxiliary Port SAE 8
Case Drain SAE 8

The shaft is directional control, spring centered to neutral.

http://www.eaton.com/ecm/groups/public/@pub/@eaton/@hyd/documents/content/pll_1474.pdf

 

[peterbuilt84]

View attachment TMX Escavator - Hydraulic Diagram .pdfJJ & Dennis,
Thank you for your quick and descriptive replies thus far. After looking at the pump I think my pumps are electronically controlled(I think LOL) . I did find a hydraulic diagram which may help to find a comparable pump/pumps to retrofit into my application . I know my joysticks do have smaller 1/4" hydraulic lines attached to it which I think is called "pilot controlled" (I think). Can you you all look at the diagram and tell me if there possibly is a unit/units out there to retrofit into my application? I was hoping to keep the majority of my hose configuration if possible to cut down on the labor time. I understand that hose ends may have to be altered. Any help would be appreciated. The 2 diagrams make up one page I had to scan in 2. (too big for my scanner)
Thanks a bunch!
Reg

 

[peterbuilt84]

Let me try the diagram again just to make sure it opens.

 

[MHarryE]

Your diagram won't load for me but you describe hydraulic pilot operated controls to your pumps - the -4 pilot lines from the joysticks. The new control from Iowa is likely Danfoss in Ames, Iowa. The history of that company is starting as Sundstrand which was a very common hydrostatic transmission, purchased by Sauer in Germany to become Sauer-Sundstrand, merged with Danfoss to become Sauer-Danfoss, and within the past few years Danfoss Piwer Systems. The system they described yo you likely incorporates a Danfoss double axial piston pump (control section in the center with one pump in each direction - compact size, nice installation package. They usually group the H1 pump with their Plus+1 controller and joystick. It's a major upgrade and completely new package. You need tandem pumps with through drive capability to run the gear pump at the end of the stack. Matching all the frame sizes, controllers, and ports is going to be a challenge, especially for a one off. Comer Industries sold its hydraulic pump business to Poclain In 2009 but that marking on the pump is not like any Comer logo I have ever seen. There are so many hydraulic companies. One of Comer's specialties is making track drives for companies such as Bobcat so pumps were not a core product. If I remember their design was licensed from a Japanese company so finding a match may just involve a lot of Internet search.

 

[peterbuilt84]

MHarryE,
Thanks for your insight & knowledge on my issue. Seems I kind of highjacked this thread. LOL The original gentleman that started this post had no pumps at all just pics. I fortunately do have my original pumps but they are getting pretty weak at this point. I was hoping to go to a more American company where parts would be more available and I'd say better quality. I have come across that H1 pump a few time but I lack the knowledge to understand a hydraulic diagram . If I can get the pump/pumps and control identified I can retrofit the hoses I have.I'm guessing I may have to see a tech . Let me try posting the diagram again. It was too big for my scanner so I did it in 2 parts.
Thanks and any help would be appreciated!