question ZETOR 3340 Left Rear Tire Valve-Stem Leaking.

[Robertzetor3340]

Hi Everyone,
My Zetor 3340 left rear tire valve-stem was leaking a liquid from around the cap by drips.
My first thought was the valve in the stem may be old and need a little tightening.
The wheel was stopped where the valve-stem was at the bottom
and I as soon as the cap was rotated to its last thread, the cap disappeared and
spaying tractor tire fluid 10 feet into the air and about 10 feet out.
Yes, I got spayed too.
I put my finger over the valve-stem which stopped the explosive spaying,
but I had no cap to place on the spaying valve-stem.
I have spare valve-stem caps and so had to leave it to get one, which did return it back to its slow dripping.
Next, I started the 3340 up and drove ahead until the valve-stem was at the top of the wheel and jacked up the wheel off the ground.
I got the tools I would need with a new valve for this valve-stem.
When I removed the cap there was a lot less spaying and there was no valve to be seen.
When I tried to install the new valve in, it would not install all the way and I am not sure what is going on here at this point.
I have a valve-stem tool with me and it did thread into the stem and stopped the leak.
The tire has lost a fair amount of air and tractor tire fluid, so will need to be re-inflated to it proper PSI.
I then checked out the Operator’s Manual which did not give PSI,
but in kPa, never seen this before (what’s going on here ?).
So google it and found conversion formula (kPa times .145 = psi) which turns out to be between 15 psi to 30 psi.
Past that little difference of (kPa), I do have a few metal valve-stem caps and using a rubber tipped air-nozzle then filled the tire to its proper PSI.
Next I attached the metal valve-stem cap and now it is not leaking.
Thinking about this old valve-stem, it may have a broke off valve in the stem.
I maybe able to drill out what ever it is in there and install a new valve into this stem,
but that is for another day.

 

[Joachim]

Welcome to Europe - we use the metric system (mm, cm, dm, m, km, ...) and for pressure we usually use Pa (kPa, mPa, ...) or Bar. Psi is not often used here.

I think its a good idea to do a litle bit to stop the rust.
To fill in we use the "Hanauer Maus":

View: https://www.youtube.com/watch?v=GhujTxC-dsE
You can fill max 75% full, never 100%.

But its not a good idea for tractors with over 30 kmh vmax... and also not good in VF tyres.

A good article about (just let googl translate it):

Brauche ich Gewichte oder muss ich meine Traktorreifen mit Wasser ballastieren?

Das Ballastieren der Traktorreifen mit Wasser ist eine einfache, wirtschaftliche und mechanisch risikolose Lösung für Ihren Traktor, aber wissen Sie auch, wie das geht?

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