Hello all,

After scouring the internet and forums, I can't find anyone with the same issue as I have.

I have a 1952 8n w/ the Sherman auxiliary trans. I bought the tractor as a basket case with the 3pt assembly and hydraulic pump disassembled and left in the elements for an extended period of time. The proof meter is inoperable but shows 2,902 hours before it stopped working.

I rebuilt the hydraulic pump and replaced the piston, cylinder and cam follower on the top lid. I also set the two springs to the correct length.

My issue is that when in both draft and position control the touch control lever raises the implement at the top of its travel and will hold it but as the touch control level is lowered the implement will drop and not maintain position. I suspect this is similar to how it would operate in draft control?

I have verified there is no leakage at the cylinder by opening the side cover. The 3pt will hold a heavy brush cutter for an extended time with the tractor shut off as well. So long as the touch control is left at the top of its travel.

There was a lot of wear/slop in the linkages inside the top cover, I assume this is where the problem lies but I would much appreciate what component(s) in particular would cause this issue or what specific adjustments I need to make.

I greatly appreciate any feedback.

Thanks,
Asher

Where the touch control lever enters the top cover, the plate has 4 bolts that can be loosened and slide the plate forward and aft. This can change the sensitivity of the lever and affect the sensitivity of the hydraulics.
Personally, 73 years on my '51 8N with Sherman (I'm 83), draft control never worked as advertised. All plowing, cultivating etc. was and still is as touch control. I did rebuild the hydraulics once and used the special Jig to adjust linkage before remounting the top cover onto the tractor. No change. Your results may vary.