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MF35 difficult to shift -- at times


 
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Dale in WV
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Joined: 05 Sep 2002
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Location: Tomahawk, WV

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PostPosted: Wed Oct 10, 2012 8:04 am    Post subject: MF35 difficult to shift -- at times Reply to specific post Reply with quote

"brother-in-law ", when using a scraper blade, "discovered" the family tractor now difficult to shift. 1962 MF 35 diesel deluxe. Made the clutch pedal adjustment today per info from Big Dean CD and instructions from DavidP in the land down under. Shifts fine when starting out - high or low range. Drive a hundred feet and you nearly have to shut it down to find neutral again...which was the status BEFORE making today"s clutch pedal adjustment. Stand on the clutch and it still creeps in gear.
Must I check PTO adjustment now, or are the symptoms
related to an adjustment there?
I think its a danger to drive until this is addressed.
 
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Gearhead210
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PostPosted: Wed Oct 10, 2012 8:35 am    Post subject: Re: MF35 difficult to shift -- at times Reply to specific post Reply with quote

Could be a pilot bearing in the flywheel trying to lock up- that will cause all sorts of issues if left alone (if it is the problem). Otherwise, just adjusting the throwout fork should at least get it to stop for you. take all backlash out of the pedal and se how it acts then. It is bad for the throwout bearing to run like that a long time, but it will tell you whether the clutch reacts at all to adjustments.
 
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DavidP, South Wales
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PostPosted: Wed Oct 10, 2012 9:14 am    Post subject: Re: MF35 difficult to shift -- at times Reply to specific post Reply with quote

Hi Dale,
No, not in OZ, I'm in South Wales, not New South Wales!!!!!
If the clutch is not freeing there are a number of possibilities.
First of all remove the inspection plate under the clutch housing. Using a flashlight inspect the clutch unit for anything that looks to be amiss, one loose release lever screw, position of a release lever different to the others etc...

Have an assistant press the pedal whilst you watch the operation. The pedal movement in each stage should be clearly related to positive movement of the release levers and main pressure plate as it moves rearwards. If it only tries to lift or the movement is absolutely minimal you need to find where the operation movement is being lost. Check that the movement is even all round.

If you have positive movement of 1/16 to 1/8" in the first stage that would be about correct. If the plate is still not freeing it could be down to contamination of the lining/s, or rust causing it to drag.

With the pedal at the bottom of the first stage there should be no clearance on the PTO adjusters. Push down through the second stage. There should still be clearance between the spring coils.

I think that a very likely cause of your problem will be a broken lining on one side of the main plate. Frequently a piece of the lining will lodge somewhere else around the face. This will give two thicknesses of lining on one side. Normal lift of the pressure plate is not enough to free it hence you will get enough drive to move the tractor. Normally this can be seen by one 'corner' of the pressure plate sitting higher than the other two as you turn the flywheel by hand.
Check it visually first and I think you will see something of the above.
DavidP, South Wales
 
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Dale in WV
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PostPosted: Wed Oct 10, 2012 12:07 pm    Post subject: Re: MF35 difficult to shift -- at times Reply to specific post Reply with quote

Thanks for the advice and also geography lesson. I believe I will position MYSELF on the drivers seat and he doing the inspection below.
If we find its a corrupted lining, that means splitting it, right?
 
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DavidP, South Wales
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PostPosted: Wed Oct 10, 2012 12:22 pm    Post subject: Re: MF35 difficult to shift -- at times Reply to specific post Reply with quote

Hi,
Yes it will. There is not a lot that you can do through the inspection hole.
DavidP
 
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