I have a 1984 Zetor 7211 with a few problems.
The high range PTO pops out of gear when blowing snow, the low range (540)
works fine. I assume it is just a matter of turning the splined shaft
between your legs to engage high or low. My manual shows a small metal lever
that should be on the shaft but my tractor only has the small vertical
splined shaft. Actually could you explain this in more detail. Why is there
a splined shaft here.
Also the differential lock is giving me problems. The mechanism used to keep
coming apart but now that I have this fixed it does not seem to work at all.
I have done the proper adjustment according to the service manual and it
worked for a while but sometime it would stay engaged and I would have to
pull up the foot lever with my fingers to disengage it. Now the foot pedal
is loose and stays in the down position ( I can lift it but it just drops
back down) and the differential stay in open mode. How is it designed to
disengage? Is this a sign that something is broken inside the differential?
When it is very cold out (20 F) I cannot turn the tractor to the left, it
will only turn right and it turns easily. After running for a while (1/2
hour + ) it will start to turn to the left. Is this a sign of water in the
cylinder? The fluid in the reservoir looks clean, clear and red.
I went through the service manuals and these problems are not addressed.
Thank you for any help.
