Top Link Rocker Adjustment

I posted this a while ago on the Ferguson board but it didn't get much interest so I am trying it here.I have a 1950 TEA 20. The hydraulic
system operates like a 9N. The lift arms wouldn't drop when I got it and I assumed the control valve was stuck. After cleaning the rear end
and putting in new oil after getting the valve free it still is no better. Someone suggested moving the control quadrant but that didn't
help. The engine isn't running just now so I am pumping the hydraulics by spinning the PTO. One day while playing with the hydraulics I
grabbed the top link rocker to pull myself up. The rocker moved and the arms started dropping. A closer look and I realized the big spring
can turn. So should my next step be to get some penetrating oil on the threads and turn the top link casting onto the rod tighter? I am
beginning to think that someone with no mechanical talent has played with it. The previous owner had it at the back of a shed for several
years and he mentioned that his son tinkered with it to get it running.
 
The FO-19 manual for the N's says; Adjustment is correct when spring is free to turn, but no end play exists.
 
(quoted from post at 09:21:58 09/11/20)..... The lift arms wouldn't drop when I got it ..... One day while playing with the hydraulics I
grabbed the top link rocker to pull myself up. The rocker moved and the arms started dropping. A closer look and I realized the big spring
can turn. So should my next step be to get some penetrating oil on the threads and turn the top link casting onto the rod tighter?

(quoted from post at 09:26:49 09/11/20) Yes, tighten the spring.

As JMOR told you, yes, the draft control spring needs to be tightened. That alone may or may not solve your problem. There are other adjustments that get out of wack with wear, time and abuse. That being said, I'd be amazed if the yoke turns as is, or with some penetrating oil. These things are usually rusted tight, and takes a bunch of heat to loosen them up. Trying to turn these when frozen, without heat, has probably led to more broken plunger rods or plate seats than actually freeing up.


(quoted from post at 09:28:21 09/11/20) How much?

Once free, tighten the yoke till you can barely / not quite turn the spring by hand.
 
jimtrs, that is an excellent caution, because those are fine threads that rust up really bad and pretty weak parts inside to resist plunger rotation. I have always needed red hot with oxy-acetylene to remove.
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top