hydraulic pto pump coupling 3/4"?

SPYDERLK · Dec 31, 2007

myyaz33 said:
Farmerford & SPYDERLK
[snip]
I have attached a couple updated pictures of the pump so now you can see the letters a little better. It does appear to be CCW doesn't it? Not sure why the first "c" is small on the side with all the numbers but the shaft side cleary shows CCW.

I think youre good for rotation and Im betting all the cases come marked CW and the other C is added when applicable. 540 is awful low rpm for a small hyd pump tho. I think the L2250 had 540/1000 PTO speeds. You may need the 1000.
larry

myyaz33 · Jan 1, 2008

The backhoe had a sticker on it that did say run at 540-800rpm, but once again not sure this is the original pump. Time will tell, I guess. Fortunately I have 540-800-1000 PTO options on the B6100.

I think I will go ahead and take the pump to the local hydraulic shop and have them test GPM to see if it is working properly.

myyaz33 · Aug 4, 2008

Never did take the pump in to get tested, but I finally got the backhoe rebuild complete and tested the pump tonight. Everything appears to be working properly. I will be posting in the Project section about the backhoe project. Thanks to all for helping me identify the specs on the pump.

myyaz33 · Sep 2, 2008

Farmerford said:
Marty:
Whatever the gpm, if you drive it with a pto at 540 rpm it will produce about 1/3 of the rated gpm, which will probably make the backhoe slow.
Chuck Ford

FarmerFord, you certainly called this one. As you may have saw in the Project forum, I got the Kubota K-650 backhoe restored and have begun using it. The problems is that running the Gresen TB-3 vane PTO pump just makes things slow as I only have the 540 pto speed on the TYM instead of the 3 speeds I had with the Kubota B6100.

I think my best alternative is to plumb to the rear remotes on my tractor. Any thoughts on this? The remotes should be around 2200psi but I think the hoe cylinders run around 1000psi. This has me a bit gunshy. The PTO pump is 3gpm vs my remotes at 5gpm. I have no idea what the backhoe valves can handle as far as gpm.