Ca hydraulic pump

There should be a gasket.        MACK

Hmmmmmm, so someone else had this apart before and did not put a gasket back on?Do I need to drain oil from anywhere else, another words is it shared to any where else that I cannot see right now with the pump off I can see it's completely drained where the camshaft and couple of gears are in my pictures?

Edited by Hunt4Allis - 26 Mar 2020 at 6:30am

Just getting ready to...

Matt, so the broken cotter pins might have jammed the linkage now and then? Could be. I also am seeing what looks like rust on a few of the parts in there....some water ran out the drain hole when I took mine apart, but I didn't find any rust.

My tractor's are always parked under roof so it makes me wonder how I obviously got water mixed back in with the oil that I just replaced in this tractor last spring?
I did drain the oil from both the drawbar drain plug end the rear diff but I did not drain anyting out of the hoses or cylinders which I'm guessing is how the new oil which I now know was low quality 303 oil became so milky looking again...

Don’t be afraid of these pumps but definitely use caution when testing. Whatever you do stand clear of anything that might be a “weak” link.
Here’s my story:
Bought a CA and changed the gear oil since it was pretty milky. Probably used a trans-hydraulic fluid from tractor supply but can’t remember for sure. Well after getting that all done, I managed to get the pump working but I’ve always been weary of these pumps if I have not tore them down. That being said I never usually let the pump kick out when it brings the cylinders up all the way, I’ll stop the pump when the arms raise up to the top. Well by mistake I did not stop the pump one day when I raised the arms and BAM the pump blew one of the cylinders apart. Luckily I was sitting on the tractor so the platform protected me from getting high speed fluid from piercing the skin. So I did the usual thing checked out the cylinder and thought that it looked like it may have had previous damage. Ok I’ll put another cylinder on. Then same thing happened again, forgot to stop the pump and it blew another cylinder. Needless to say I have not changed out that cylinder as a reminder to not use the hydraulics on that tractor.

Long story short, try to use some sort of protection if possible while testing a pump, they put out some serious PSI. You don’t need steel or fluid under the skin if something fails.

Edited by NE GA Allis - 26 Mar 2020 at 12:25pm

You need to pull the plate off the yellow circle is on.        MACK

Wouldn't the shaft that extends through the plate need to be attached to something behind that plate in order to link the pump to the control unit?

Came off with a putty knife
It doesn't look like the rest of it can easily come apart?
I've gone this far and I believe I found some small chunks of spring in passageways and wonder if it's from the under side of the rollers that is a bit lower in this picture than the other 3 rollers?(can't tell what's normal height from exploded view I have)


The left one is lower than other 3 to right, so what I've found small chunks of what seams to be spring material could be part of left spring which is why it's shorter now so the left one is lower?
Thanks Matt

Not sure I'm understanding correctly mack

Ok thanks
I'm not sure how these three large plugs and one smaller one come out because the cam followers do not move back away enough for them to come out (in my limited experience)
The long pin that goes through all of the cam followers opposite the roller (where they attached to the body of the pump) seems like it is pressed in with Force because I tapped on it lightly and it did not seem to want to move?
Here's the pin( yellow arrow pointing to the end of it.


Edited by Hunt4Allis - 27 Mar 2020 at 7:15am

No, the small and large spools lay length ways of pump. You have the small ones out, the large ones are what the small ones came out of. The end one will have two orings on it. Replace the orings along with the two on unloading value.      MACK

Start digging 😜into into her

MACK wrote: Use some penetration oil around them. With a small hammer, a quick rap will some times bounce them up enough to get ahold of them. Have had to weld a nut to them and twist them out.            MACK