Z134 main bearings in a TO30

I am putting a new crank shaft in my 30 and have found that
neither the Straight Shell or the flanged z129 bearings matched
the oil holes in the crankcase journals. So I bought the z134 main
bearing set with a center flange (which is what came out of it) and
it fits perfectly. I have talked to the good people of FENA and they
are researching it. I was told I should try here. Thanks for any
light you can shine on this for me.

Kenny
 
I would check the block to see if there is a # Z134-600. in the casting. It might be a Z134 block but I am just guessing . All I have is TO 20.
 
(quoted from post at 15:25:57 01/21/08) I would check the block to see if there is a # Z134-600. in the casting. It might be a Z134 block but I am just guessing . All I have is TO 20.

The block is stamped Z129 and the broke crank that came out was stamped Z129.
 
Hhhmmm very strange. The TO 20-30 mains interchange as long as you have the flanges correct. The Z134 has a different part# for the mains. Are you saying the crankshaft end play is controlled by the center main instead if the front main? I have been reading this board for 7-8 years and this is the first time your problem has come up that I know of.
 
Well this is what I know now, the motor was rebuilt about 10-15 years ago, the crankshaft broke in august 2007 , we finally got it apart and the main bearings that were in it are for the z134. So yes the thrust washers are in the center journal and are double sided. So the 129 main flanged bearings will fit. So I guess now the question is does it matter which one to use?
Here is a pic of the ones that came out (on the right) and the 129 flanged (on the left)
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I am wondering if the old broken crank used to have the thrust washers on the front and they failed and your crank got damaged in the front where the rear thrust washer rides against the crank. The Z134 bearings were the fix. What I can't undersatand is how they got the Z134 center bearings to work on a Z129 crank. I would look very carefully at both cranks and compare the thrust surface. I am interested in the outcome as I have a TO20 crank that the front thrust washer failed and the crank is damaged. This could be a fix but seems unlikely. Sure would be slick if it would work and the Z134 bearings cost far less also. Good luck.
 
Duner, I have been talking to my friend that I bought it from and he said his dad took it to a machine shop in about 1999 and it had the z134 bearings in it then, so thats what they went with. Now this time its the same situation, to go back with the front flange bearing or use the center flange. Im along your train of thought that the flanged center bearing was an upgrade for the 134. The 134 bearings fit perfectly in the block and the crank fits and turns great with very little play. By the way on this site it says the 129 and 134 crank is the same.

[Crankshaft - New Crankshaft for Continental Z129 and Z134 gas engines. For TO30, TO35, 35, 50, MH50, 135, 202, 204 . Less BearingsAlso replaces 1750169M1. (Part No: 830686M91)]

That tractor ran great for 8 years until the ground crank broke,(it broke in front of the center journal).

I would like to hear what you guys think.

kenny
 
It sounds like it should work but I don't know that for certain. I am going to look into it more for my engine . I would email John UK on this board as he gives his email address out and is posted many times.
Next I would contact Big Dean on the Massey Ferguson board on this site and see what he says. Both are very knowledgeable on Fergys. Let us know how it works out. If the center flanged main fits your main bearing cap and saddle in the block and all the oil hole line up I can't see why it would not work. Your crankshaft end play needs to bee correct also.
 
I have a TO20 crank that the front thrust washer failed and the crank is damaged.

Hey Duner, could you explain what happened to the thrust washer and what part of the crank is damaged. This is all new to me and would like as much information as I can get before I put this thing back together.

Thanks,

kenny
 
I think my dad told me the Z134 bearings will fit ,he did work for a dealer for about ten years I think you should have your block line bored to make sure of a true fit Good luck
 
I think my dad told me the Z134 bearings will fit ,he did work for a dealer for about ten years I think you should have your block line bored to make sure of a true fit Good luck
Thanks, I know the bearings fit great and that tractor has run with the 134 bearings for a long time with no problem. If there is anything else you can remember about that I would like to know, thanks.

Kenny
 
I looked thru the junk pile today and here is what I found . The crank looks ok but due to the thrust washer failing the crank was able to kiss the block where the thrust washer would normally be. I bought this thing in a basket years ago. when I bought it the reason they were selling it is because of this crank end play problem. I measured the thickness of the center web and it looks to be machined on both sides and about 1.300 in. thick. If the oil holes line up and the bearing fits I think I will try it next time I am doctoring . Why did the center main fail in yours? Lots of copper showing. Line bore might be a good idea as already suggested. Always curious when a crank breaks.
 
I measured the thickness of the center web and it looks to be machined on both sides and about 1.300 in. thick. If the oil holes line up and the bearing fits I think I will try it next time I am doctoring . Why did the center main fail in yours? Lots of copper showing. Line bore might be a good idea as already suggested. Always curious when a crank breaks.
I will measure the inside of the bearing tomorrow and let you know, the oil holes line up perfectly on mine. As for why my crank broke, not sure but I can tell you it was ground .060" and there was a vibration in the motor from time to time. I was using a finish mower when it broke. I think the crank had been partially broke, but that is just a guess.
 
Thanks for the measuring. My 1.300 has some dirt and grease . 1.290 should slide on . The front thrust scheme Continental used on Z129 was used on many models of Continental with same part # for thrust washers. Please post if you find out anything new.
 
I went ahead and had my mechanic use the z134 bearings. with everything bolted down, the crank turned smooth and everything looks good. so they put the motor back in yesterday and it is running great. Going forward we know the bearings work in the z129 (hopefully for a long time) time will tell.
If anyone has any questions give me a shout.

Kenny
 
(quoted from post at 17:42:50 02/03/08) I went ahead and had my mechanic use the z134 bearings. with everything bolted down, the crank turned smooth and everything looks good. so they put the motor back in yesterday and it is running great. Going forward we know the bearings work in the z129 (hopefully for a long time) time will tell.
If anyone has any questions give me a shout.

Kenny

I know this is an old thread but I am having this problem. I have a 51 ferguson to-30 with the z129 engine. the front thrust wash is gone and the crank rubbed the front main bearing cap and scored the cap. I need to replace the bearings and would like to know if you used the z135 bearings and how did they fit. Did they have the center flange. is the scored main cap going to be a problem ? any help would be great.

thanks
 
(quoted from post at 21:17:29 04/27/13)
(quoted from post at 17:42:50 02/03/08) I went ahead and had my mechanic use the z134 bearings. with everything bolted down, the crank turned smooth and everything looks good. so they put the motor back in yesterday and it is running great. Going forward we know the bearings work in the z129 (hopefully for a long time) time will tell.
If anyone has any questions give me a shout.

Kenny

I know this is an old thread but I am having this problem. I have a 51 ferguson to-30 with the z129 engine. the front thrust wash is gone and the crank rubbed the front main bearing cap and scored the cap. I need to replace the bearings and would like to know if you used the z135 bearings and how did they fit. Did they have the center flange. is the scored main cap going to be a problem ? any help would be great.

thanks
I had to go back and read through this thread it jog my memory it's been a while. Everything fit great and I am still using it to date.
 
So you used the z134 main bearings with center flanged main bearing and it is still working good.did you have any scoring on the front main cap, and did the crank have to have anything done to accept the flanged center bearing.

Thanks

Isie
 
(quoted from post at 17:50:04 04/28/13) So you used the z134 main bearings with center flanged main bearing and it is still working good.did you have any scoring on the front main cap, and did the crank have to have anything done to accept the flanged center bearing.

Thanks

Isie
I don't remember if there was scoring. I put in a new crank and the z134
Bearings fit perfectly. If I remember correctly it seemed
Having the flanged center was an upgrade from the 129.
That's about all I can remember about it. I can ask the mechanic who worked
On it if you need more information.

Kenny
 

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