jubilee hydraulics

[dlp]

Sometime back, I rebuilt the square hydraulic pump on my father-in-laws Jubilee. I used it the other day & noticed a problem. When lifted to the top with a bushhog on it, it would drop a little bit & then come back up, drop again, & repeat this consistently. What is up with it? Thanks in advance!

 

[Dunk]

Honestly I don't have a clue.

But since I am the fine feller that I am, that is always falling off my rocker, I am going to give you a link to something that you need to SAVE to your computer hard drive for future reference.

You will need Adobe Reader (free) to open it.

http://collectible-stuff.com/Tractor Stuff/NAA Hyd Ctrl Adjustment.pdf

 

[Dan]

This is fairly common for the NAA tractors. This is caused by wear on the control valve inside the lift cover and leakage because of this. It is much easier to live with this than try to find the correct size valve to replace it.

Dan