Zetor valve settings

[Eppyntman]

Hi. I have had to replace head gaskets on my zetor 6945. Can anyone tell me the sequence to set tappet clearances.Ie when 1 is at top adjust 6. Thanks . Giles

 

[agrimax]

Firing order 1 3 4 2. Set clearances ...inlet to 0.20mm and exhaust 0.30mm(0.25mm for both will do).Turn engine clockwise looking at front.
Valves...7 and 8 rocking...set valves 1 and 2
Valves...3 and 4 rocking...set valves 5 and 6
Valves...1 and 2 rocking...set valves 7 and 8
Valves...5 and 6 rocking...set valves 3 and 4

 

[Eppyntman]

Nn

Firing order 1 3 4 2. Set clearances ...inlet to 0.20mm and exhaust 0.30mm(0.25mm for both will do).Turn engine clockwise looking at front.
Valves...7 and 8 rocking...set valves 1 and 2
Valves...3 and 4 rocking...set valves 5 and 6
Valves...1 and 2 rocking...set valves 7 and 8
Valves...5 and 6 rocking...set valves 3 and 4

Thank you very much. Valves number one nearest the radiator?

 

[Eppyntman]

Thank you very much. Valve number one nearest the radiator?

 

[davidroberts30]

Yes

 

[startinghandle]

Hi. I have had to replace head gaskets on my zetor 6945. Can anyone tell me the sequence to set tappet clearances.Ie when 1 is at top adjust 6. Thanks . Giles

Did you renew core plugs in heads?

 

[Eppyntman]

Did you renew core plugs in heads?

Core plugs?!

 

[Eppyntman]

Core plugs?!

 

[Chae1]

@zetnige

 

[startinghandle]

I used to help out in a small rural garage and 2 Zetors come in with leaking coolant from corroded core plugs caused by antifreeze turning into acid caused by not renewing
One tractor was not that old
Your 6945 is an older model so probably has been done
What is problem with head gasket?

 

[Eppyntman]

Head nuts had slackened, gaskets disintegrated. All cleaned and replaced but with head torqued down to 18kgm the rockers are all tight ie none are rocking. I am a bit stuck where to start adjusting them? Presumably slacken them all off and start from scratch?

 

[davidroberts30]

Head nuts had slackened, gaskets disintegrated. All cleaned and replaced but with head torqued down to 18kgm the rockers are all tight ie none are rocking. I am a bit stuck where to start adjusting them? Presumably slacken them all off and start from scratch?

i would
cant remember the settings now but 10/12 thou would be a start

 

[Mur Huwcun]

Head nuts had slackened, gaskets disintegrated. All cleaned and replaced but with head torqued down to 18kgm the rockers are all tight ie none are rocking. I am a bit stuck where to start adjusting them? Presumably slacken them all off and start from scratch?

You could have a speck of dirt on the cam follower. I now always roughly set them and start up then re adjust correctly after years ago gaining 20hp on dyno by re setting them!

 

[Peewee429]

Firing order 1 3 4 2. Set clearances ...inlet to 0.20mm and exhaust 0.30mm(0.25mm for both will do).Turn engine clockwise looking at front.
Valves...7 and 8 rocking...set valves 1 and 2
Valves...3 and 4 rocking...set valves 5 and 6
Valves...1 and 2 rocking...set valves 7 and 8
Valves...5 and 6 rocking...set valves 3 and 4

Sorry I'm a little late on this thread, but I have a 1986 7211 Zetor and I was wondering if these specs were right for my model too?

 

[agrimax]

Should be ok. Same engine as the above 6945 afaik

 

[Peewee429]

Should be ok. Same engine as the above 6945 afaik

Thanks a lot!! It's the only thing left to do to get thi tractor running right. Thanks a lot again!