Hydraulic pump woes

I put the new driveshaft on the front of the crankshaft tonight for the engine drien pump on our 165 for the loader. Troubles is, I screwed up bigtime when I made the shaft. The new hub had left hand threads on the crank end, so I figured I'd make the other end right hand threads for the sprocket and it's been hanging on the shop wall for the last 2 1/2 years.

When I went to start it, the sprocket spun itself off the shaft, pressing the end of the pump out the back wrecking the pump. Here's where it gets tricky:

The pump is old and original to a different loader that was on the tractor. Never knew mfg of it, just that it was a bad design that tore up easy. It's got a 3 1/4" pilot, and the bolts are on a 3 1/4" square pattern which makes them to be on about a 4.596" bolt circle. Obviously I can't find one speced out like that in the online books.

If I have to, I can take the bracket off the tractor and change it to work with some other pump, but I have no idea what brand the pump was, how many GPM it was, or anything else about it. Where is a good place to buy a pump? At this point I'm pretty much planning to machine the bracket on the 165 to fit something else, just not sure which way to go...



Donovan from Wisconsin

It's an older Char-Lynn "gerotor" style pump.

I'll try to find the displacent specs for you.

looks like a commercial gear pump. i got a book with formula's to calculate displacement in the shop.

I figured somebody here would be able to ID it for me. I'm probably gonna take it apart just to see what it looks like inside, but the end cap that has a retaining ring groove in it is blown right out. Kinda pisses a guy off cause it was a great pump yet. I figure it was probably around 40 years old, if not older. The tractor best we figure is a late 60's.

Donovan

Char-Lynn P-400.

1500 PSI max

Max speed 2400

10GPM @1750 RPM

<img src = "http://i56.tinypic.com/21axrfs.jpg">

I'll post the component part number in a bit.

Don: Still have my mail, Send me one include phone number and we can talk pumps.

DOn ,A while back I noticed a post from Jde that had a listing of all kinds of pumps and replacement pumps (NEW) for a very reasonable price,also pressure reading per pump ,GPM etc.
Reguards,
LOU

Here's the parts breakdown. Try Eaton for the parts that broke, also try GOOGLING the numbers. There just MIGHT be something still out there!

<img src = "http://i55.tinypic.com/t04y1g.jpg">

You might be able to find a replacement at Surpluscenter.com, they might even be able to match it up zackerly, sometimes they have just what you want.

If you have to change the mounting holes isn't a big deal. Any pump in the 10 to 18 GPM range and around 2000/2500 PSI would work. The pressure is set by the relief valve which is most likely on the control valve. The MF industrial loaders usually ran a 17 GPM pump for loaders and a higher volume pump if a backhoe was also installed. Going by the size of your lines, I think you'd be at the lower end of the scale, 10 to 12 GPM. I'd put on a common pump so parts and repairs would be easy if necessary. Dave

Those "Char-Lynn" brand pumps have been obsolete for 20 years. Yes, they were a division of Eaton,
but I doubt that you"ll have any luck finding parts.