• Hello Guest, you do not yet have the necessary rights to see the contents of our FAQ articles. Register in our forum, briefly introduce yourself and your Zetor in words and pictures and actively participate in discussions in the forum, then you will automatically receive access to the specialist articles in the FAQ.

question Zetor 4718 engine problem

Gasper

Member
Level 2
Joined
Oct 20, 2024
Messages
5
Location
Slovenia
First name
Gasper
Machinery:
Zetor 2511, 4718 , 6211, 7745
Hello everyone,
My zetor 4718 started spewing out oil from the exhaust today while doing some log splitting. It has been burning about a liter of oil every 10-20 engine hours for the past 20+ years. I wonder if it is suffering from the piston rings failure as it only has one cylinder affected plus a little bit of blow-by. The cylinder walls are worn as well ( no cross hatches ) and has a bit of a lip at the top. Or could it be the valve seals? Don’t want to spend too much money on it as all it does is log splitting, tedding and loading manure. Thanks for any advices.
 

Attachments

  • IMG_3006.jpeg
    IMG_3006.jpeg
    116.2 KB · Views: 39
I think this could be due to coked piston rings from running for too long without load. The piston rings can then seize up and no longer scrape the oil properly.

Generally, you should occasionally put the tractor under full load to prevent this.

The lack of a cross-grind and the edge above the cylinder liner also indicate corresponding wear, which can also lead to increased oil consumption, but should also be detectable early on by slight smoking from the engine case ventilation.

In the worst case, it needs new pistons/bushings. Also check the valves and replace them if necessary.
 

Users who are viewing this thread

  • Back
    Top Bottom