Stuck hydraulic piston

I've got a '54 NAA that I'm going through, and I currently have the hydraulic cover off. I've replaced the cam follower pin and cleaned a couple of other things up.

But I can't get the piston out of the cylinder. Have tried compressed air, but I'm not sure I'm shooting it into the right spot.

Any advice.....? Thanks! Jeff
 
try feeding it into the side port the pressurized oil would go to if on the tractor, lift handle up of course.
 
Thanks for the help!

I didn't even think about the handle, and I actually have all of that taken apart to get to the cam follower pin to repair it.....

I guess I'll have to wait to get the piston out until everything else is re-assembled?

Thanks again!
Jeff
 
(quoted from post at 09:56:10 10/06/16) Thanks for the help!

I didn't even think about the handle, and I actually have all of that taken apart to get to the cam follower pin to repair it.....

I guess I'll have to wait to get the piston out until everything else is re-assembled?

Thanks again!
Jeff
he one that is over the cylinder (lower left in photo).
 
I have the linkages all back together, I tried again, and it still won't move....

I don't have the cylinder removed from the top cover. Is that required? If not, just to be clear, what hole do I need to be sending air through?

The way things are set right now, if I send it into the hole with the rubber gasket on the side of the cylinder, it comes out of a hole in the top cover...and if I cover that hole with my finger and shoot air in, the piston still stays put.

Not sure why I'm having such trouble this time around. Did the same thing with my 8n a while back, and it it took me about 1 minute.

Thanks again for the help!
Jeff
 
(quoted from post at 12:54:56 10/06/16) I have the linkages all back together, I tried again, and it still won't move....

I don't have the cylinder removed from the top cover. Is that required? If not, just to be clear, what hole do I need to be sending air through?

The way things are set right now, if I send it into the hole with the rubber gasket on the side of the cylinder, it comes out of a hole in the top cover...and if I cover that hole with my finger and shoot air in, the piston still stays put.

Not sure why I'm having such trouble this time around. Did the same thing with my 8n a while back, and it it took me about 1 minute.

Thanks again for the help!
Jeff
hat backpressure hole isn't the place to apply pressure, but it does need to be blocked. However, you need over 115 PSI just to overcome the check valve. If you are not going to separate the cylinder from the top cover, you probably should apply pressure to the accessory cover port (remove plug), place control lever anywhere except "lower".
 

Hmmmm.

I've got a Selec-trol on my cover instead of the standard accessory plate. Maybe I should just remove the cylinder.....

Thanks for the reply!
Jeff
 
OK, so I am having difficulty with removing the Selec-trol unit from the top of the hydraulic cover. Specifically, the nut on the middle stud is impossible to get to due to the shape of the selec-trol casting. Anyone ever deal with this and have any hints? Otherwise, I'm going to have to figure out how to get the piston out without removing the cylinder from the cover.

Thanks again!
Jeff
 
(quoted from post at 14:41:37 10/06/16) OK, so I am having difficulty with removing the Selec-trol unit from the top of the hydraulic cover. Specifically, the nut on the middle stud is impossible to get to due to the shape of the selec-trol casting. Anyone ever deal with this and have any hints? Otherwise, I'm going to have to figure out how to get the piston out without removing the cylinder from the cover.

Thanks again!
Jeff
mpossible? It had to be installed at some point.
 
I know, I know.

Got to be a way. Interestingly, one of the nuts holding the selec-trol on was modified so that it is 11/16" across 2 sets of flats and 9/16" across 1 set of flats, so I had to keep switching between wrenches to get
that one off. The one that is left on is a standard 11/16", but it just has so little clearance above and to the sides that nothing but the very tip of a needlenose can get to it, and there is no room to apply torque
when the needlenose is on it.

I'm almost ready to chisel the nut off of the stud. Usually bad things happen when I break out the chisel, though. And I'd hate to break my Selec-trol. I'll never use it, but it's probably the coolest/rarest part of
my tractor!

Jeff
 

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