6080 clutch and crankshaft problems

Ford9000puller · Feb 18, 2014

Hi everyone, I am a ford man but am working on a 6080 for a guy and am looking for some info. I put a clutch in this tractor from A&I a year and a half a go and it lasted 13 months and it started slipping. Put in another from them in Sept and it seemed to work good and the guy has used it till now. It broke a shift fork so I got it fixed and drove it today and the clutch wont fully release. It will stop forward movement but you cant shift with out a lot of resistance, Id say the cause of the broken fork. I did discover the crankshaft has a lot of end play and have heard this can affect the life of the clutch. I was looking for some info on if the crankshaft play can affect the clutch and suggestions on where to get a clutch. Thanks in advance for any info

gearheadbill · Feb 18, 2014

If the crankshaft has a lot of endplay, the problem needs to be addressed. Most of these models had a "bra" or tripod front crankshaft support mounted externally as an update. If you have lots of endplay, either the tractor never got this update or the bearings are out of the front support. You are probably looking at replacing the crankshaft.

KSTractor · Feb 18, 2014

The original 6080 block didn't have a heavy enough thrust bearing to take the force of the clutch when it was disengaged. When Deutz bought A.C they recalled every 6080 and measured how far the crank moved forward and back. I don't remember the specs but the minimum moving ones got a thrust bearing that bolted to the frame in front of the engine and pushed against the front of the crank. a little more movement and they got new main bearings and the thrust bearing, still more and they got a complete overhaul and some were so bad that they got a new heavier short block those didn't need the external thrust bearing. The dealer I worked for got all of theirs in for the warranty work but some others didn't

Ford9000puller · Feb 18, 2014

It does have the support on the front but I have a feeling the bearings are bad, gonna check it tomorrow. How does the movement effect the clutch. I understand that the flywheel and clutch move with the crank. What is the part of the clutch that fails. The first one ate the button surface of the disc to the rivets and I blamed a poor disc from A&I

Bob Bancroft · Feb 19, 2014

Don't know about the clutch part. But end play should only be measured in .000" like any engine. These were still quite new when I worked on them. I was tasked with installing the external front support on all the 6000 series we sold. As I recall it was a Timken type bearing with a grease fitting. I would suspect if that bearing was greased, it would last indefinitely.

hd6gtom · Feb 19, 2014

When I was going to coffee breaks at the local Ac dealership (next door to the place I worked) in the 1980's, I remember Alan telling us the clutch in a 6080 has to be put in a certain way if it isn't you will have problems. I do not remember the solution to the problem. Maybe someone else can contribute more to this.

Anonymous-0 · Feb 19, 2014

I have an 80 model with over 8000 hours on it, most of those pulling a round baler. The dealer recalled mine at about 2 years old and put in a new crank and bearings because of worn thrust bearing. Also put in a new clutch. They did a shoddy job. It failed within a year. AC had sold to Deutz by then, so my local Deutz dealer ( who was also the Ford dealer ) brought it in and put the bearing support in front of the crankshaft and also changed mine to a throwout bearing that rides against the fingers at all times without any free pedal. They also put a clutch in it and that one lasted over 30 years. A few years ago I was gonna put another clutch in it and found the splines on my input shaft worn so bad, the new clutch would not release properly. So, I replaced the shaft myself, put in the clutch and no more problems. My clutch was an A&I clutch and I have run it 3 years now without any problems.

Ford9000puller · Feb 20, 2014

Thanks for all the info guys. I think the endplay is causing my clutch problem. Talked to the allis dealer and they said they had one that they put 3 clutches in within a year when it was new and then they found the endplay and put the support on and no more problems. I'm gonna address the crankshaft first and then move to the clutch. Thanks again for the help.

T in NE · Feb 21, 2014

When the throw-out bearing pushes on the pressure plate, it pushes the crank forward in the block, against the thrust bearing, before it can start to release the clutch.
The pressure plate and flywheel are held by the crank, and the clutch fork and throw-out bearing are held by the bellhousing.

6080 clutch and crankshaft problems

Ford9000puller

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gearheadbill

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KSTractor

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Ford9000puller

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Bob Bancroft

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hd6gtom

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Anonymous-0

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Ford9000puller

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T in NE

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