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Q for Bill Brox
Show Parts for Model:

MF 35 Differential

Author 
Kurt in Texas

08-25-1998 14:12:08




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In my message about "MF 35 won't move", you made the following comments:

> The good thing about non diff lock differentials > on MF 35 is that there is no bearing adjusment > except for the pinion. On diff lock you need a > very special tool and good skills to do this. > A rather complicated service.

> Well, since your MF 35 has no diff lock the > only problem you gets into is the fastening of > the ring gear. You need new bolts and nuts > (12 pcs) and a special Loctite product made for > Massey Ferguson. Then you need a real heavy > screwdriver and you need a friend to assist > you. No way you can do this alone.

I now have a picture of the assembly from a parts dealer. Two questions:
1. Is the pinion adjustment done with shims? It's not obvious how to do this from the picture?
2. For the ring gear, why do you need 2 people and a screwdriver? Can't I remove the whole assembly, replace the gear on the bench, and put it back?

Thanks for the help...BTW, can you tell me roughly what it would cost to get a used differential assembly, US$? I'm guessing $300-$400.

Kurt

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M. Smith

08-26-1998 14:36:25




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 Re: Q for Bill Brox - MF 35 Differential in reply to Kurt in Texas, 08-25-1998 14:12:08  
The adjustment on your pinion is done with the nut on the front side of the pinion. Sorry to inform you, but there is adjustments on the ring gear carrier most people do not go to the trouble due to work involved. The adjustment is done with shims behind the bearing cups in the axle housings. Lots of dealers will tell you that there is no adjustment on the carrier brgs, because the shims are not shown with the carrier assy. they are shown on the page with the axle housings. I would not advise using one of the cheap aftermarket gear sets that are listed for a 35. I have installed several in the past, and they don't seem to hold up very long.

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Bill Brox

08-26-1998 10:56:17




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 Re: Q for Bill Brox - MF 35 Differential in reply to Kurt in Texas, 08-25-1998 14:12:08  
Hi Kurt,

No shims adjustments on MF 35 WITHOUT differential lock.

Adjustment on pinion is done by the adjustment nut, and a torque wrench or similar.

Of course you need to take the diff. assembly out of the center house, place it on the workbench and do the ring gear swap there.

You need a friend to help you with the ring gear. You see, first you need a torque wrench, and then you need a real big scredriver. When you study the bolts you will see the size you need.

I don't have such a big screwdriver, so I had to make it from a large truck leaf spring clamp, and harden it. This screwdriver is around 24 inches long end to end, and a 90 degree angle in the middle so I can hold it tightly.

It is really nuts how much power you need to hold it. It was much easier of you could use a regular pipe or so, but there is other parts on the diff. that goes into the valley between the ring gear tooths and the diff housing so it is almost impossible as the construction is made.

You need both hands on the screwdriver, + the force of your upper body to hold it in place. It is hard to hold the diff. house in place, unless you have a real large wise.... I was not close to it.

I will not recommend you to put the ring gear directly in the wise, it is extremely hard, just bang it with a little screwdriver handle and you will hear. Like a little church bell. A little crack, and the fun is gone !!!

If you fail on this, please remove the nuts from the ring gear right away before the Loctite gets a chance to lock. Once locked you need to heat them with a Acetylene / Oxygen flame and never use them again.
This Loctite is a strong type, and fast too....


Have no comment about a complete diff. housing price, + pinion. Remember, never change only the ring gear, There is a code on both ring gear and pinion so you can see the match.

I paied US $190 + sales tax for a used ring gear and pinion. They were very fine, and not worn to much.

Hope this helps.

Bill Brox

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Kurt in Texas

08-26-1998 14:57:12




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 Re: Re: Q for Bill Brox - MF 35 Differential in reply to Bill Brox, 08-26-1998 10:56:17  
Thanks, now I understand why you need 2 people. I'll be taking everything apart Saturday to see how bad the damage is, and hopefully locate the replacement parts.

I did find out that a new differential assembly costs $700 or $800. Hopefully I can get out cheaper.

Kurt



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M. Smith

08-25-1998 17:20:40




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 Re: Q for Bill Brox - MF 35 Differential in reply to Kurt in Texas, 08-25-1998 14:12:08  

: In my message about "MF 35 won't move", you made the following comments:

: > The good thing about non diff lock differentials : > on MF 35 is that there is no bearing adjusment : > except for the pinion. On diff lock you need a : > very special tool and good skills to do this. : > A rather complicated service.

: > Well, since your MF 35 has no diff lock the : > only problem you gets into is the fastening of : > the ring gear. You need new bolts and nuts : > (12 pcs) and a special Loctite product made for : > Massey Ferguson. Then you need a real heavy : > screwdriver and you need a friend to assist : > you. No way you can do this alone.

: I now have a picture of the assembly from a parts dealer. Two questions:
: 1. Is the pinion adjustment done with shims? It's not obvious how to do this from the picture?
: 2. For the ring gear, why do you need 2 people and a screwdriver? Can't I remove the whole assembly, replace the gear on the bench, and put it back?

: Thanks for the help...BTW, can you tell me roughly what it would cost to get a used differential assembly, US$? I'm guessing $300-$400.

: Kurt

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