Archived

This topic is now archived and is closed to further replies.

Jason Epperson

1086 clutch adjustment

17 posts in this topic

Today I finally got my 1086 back together after a clutch and T.A. job. I started the tractor and ran it for a few minutes before I tried the clutch and its not releasing. Gears just grind. I adjusted both sides of the slave cylinder, free travel, dump valve and trans. brake according to the I.T. manual. My factory IH service manual was missing the pages on clutch adjustment. Any ideas. Do I need to somehow bleed the system?

Share this post


Link to post
Share on other sites
Today I finally got my 1086 back together after a clutch and T.A. job.  I started the tractor and ran it for a few minutes before I tried the clutch and its not releasing.  Gears just grind.  I adjusted both sides of the slave cylinder, free travel, dump valve and trans. brake according to the I.T. manual.  My factory IH service manual was missing the pages on clutch adjustment.  Any ideas.  Do I need to somehow bleed the system?

No bleeding necessary.

Did you have the flywheel turned?

Share this post


Link to post
Share on other sites
Today I finally got my 1086 back together after a clutch and T.A. job.  I started the tractor and ran it for a few minutes before I tried the clutch and its not releasing.  Gears just grind.  I adjusted both sides of the slave cylinder, free travel, dump valve and trans. brake according to the I.T. manual.  My factory IH service manual was missing the pages on clutch adjustment.  Any ideas.  Do I need to somehow bleed the system?

No bleeding necessary.

Did you have the flywheel turned?

Yes I had the flywheel turned, both faces. I put a clutch disc out of a 1486 in there also. Same diameter just had 2 extra buttons.

Share this post


Link to post
Share on other sites
Today I finally got my 1086 back together after a clutch and T.A. job.  I started the tractor and ran it for a few minutes before I tried the clutch and its not releasing.  Gears just grind.  I adjusted both sides of the slave cylinder, free travel, dump valve and trans. brake according to the I.T. manual.  My factory IH service manual was missing the pages on clutch adjustment.  Any ideas.  Do I need to somehow bleed the system?

No bleeding necessary.

Did you have the flywheel turned?

Yes I had the flywheel turned, both faces. I put a clutch disc out of a 1486 in there also. Same diameter just had 2 extra buttons.

Was there a rounded edge on the clutch mounting surface next to the ring gear or did they cut it out square like it is supposed to be?

I have also seen the friction surface cut past spec and end up with the clutch disc rubbing the flywheel bolts.

Share this post


Link to post
Share on other sites

I believe that it was bround smooth and square to the ring gear. I can't remember for sure. I took the TA housing, MCV, and flywheel to the Case-IH dealer and they did all the work to it. I tore it down and put it back together.

Share this post


Link to post
Share on other sites
I believe that it was bround smooth and square to the ring gear.  I can't remember for sure.  I took the TA housing, MCV, and flywheel to the Case-IH dealer and they did all the work to it.  I tore it down and put it back together.

When you look up at the throwout bearing are all of the fingers the same distance from the bearing?

Which clutch bell crank mounting do you have? Mounted to the bell housing or on a bracket bolted to the cab?

Share this post


Link to post
Share on other sites
I believe that it was bround smooth and square to the ring gear.  I can't remember for sure.  I took the TA housing, MCV, and flywheel to the Case-IH dealer and they did all the work to it.  I tore it down and put it back together.

When you look up at the throwout bearing are all of the fingers the same distance from the bearing?

Which clutch bell crank mounting do you have? Mounted to the bell housing or on a bracket bolted to the cab?

The bellcrank is bolted to the cab. I haven't checked the distance from the fingers to the release bearing yet. They told me at the dealer that the clutch plate was ready to go.

Share this post


Link to post
Share on other sites
I believe that it was bround smooth and square to the ring gear.  I can't remember for sure.  I took the TA housing, MCV, and flywheel to the Case-IH dealer and they did all the work to it.  I tore it down and put it back together.

When you look up at the throwout bearing are all of the fingers the same distance from the bearing?

Which clutch bell crank mounting do you have? Mounted to the bell housing or on a bracket bolted to the cab?

The bellcrank is bolted to the cab. I haven't checked the distance from the fingers to the release bearing yet. They told me at the dealer that the clutch plate was ready to go.

Just make sure the clutch fingers are relatively evenly spaced from the throwout bearing surface. An uneven gap could be a clue that there is a problem. Or assurance that there is not a problem.

Also look for the position of the fingers relative to the center hub of the pressure plate. Where is the throwout bearing on the support sleeve?

Block the clutch pedal in the down position and see if the throwout bearing is depressing the fingers a sufficient amount to release the clutch.

Just some ideas.

Jim N.

Share this post


Link to post
Share on other sites

Jason, It could be the flywheel has had the more than than the maximum allowable material removed. If it has had 2 or 3 clutches put in the flywheel may be past the allowable specs. Then you have what you are experiencing. Good luck.

Share this post


Link to post
Share on other sites

I looked at the release fingers and they looked evenly spaced but I will measure them to be sure. What should the gap be between the bearing and fingers with the engine off?

Share this post


Link to post
Share on other sites
How much free play do you have?

FD B)

I set it at 1 1/8th inches like the book says. I shortened it up to just under an inch and tightened the trans brake another turn and everything seems to be working fine now. I suspect that the flywheel has been surfaced too many times and this is where my problem is at.

Share this post


Link to post
Share on other sites

Seems to me I saw flywheel shims for the 400 series at one time....

Of course CRS doesn't allow me to remember who made them. :(

One other thing it could be is a incorrect flywheel step spec.

Share this post


Link to post
Share on other sites

I have also used extra-long finger adjusting bolts in a pinch. I'ts not the "right" way to go, but it happens. :blush:

FD B)

Share this post


Link to post
Share on other sites

Will using it with the free travel a little less than spec. hurt anything? There is still free travel and the fingers don't touch the release bearing when engaged. What do you all think?

Share this post


Link to post
Share on other sites
Will using it with the free travel a little less than spec. hurt anything?  There is still free travel and the fingers don't touch the release bearing when engaged.  What do you all think?

As long as the fingers don't touch the bearing while released you'll be OK.

I would still be concerned about having to run the clearance close to get the clutch to release.

Does the clutch engage as soon as you start to raise the clutch pedal?

Does it engage smoothly?

Share this post


Link to post
Share on other sites
Will using it with the free travel a little less than spec. hurt anything?  There is still free travel and the fingers don't touch the release bearing when engaged.  What do you all think?

As long as the fingers don't touch the bearing while released you'll be OK.

I would still be concerned about having to run the clearance close to get the clutch to release.

Does the clutch engage as soon as you start to raise the clutch pedal?

Does it engage smoothly?

The clutch engages smoothly. It engages after I let the pedal out about a 1/2 inch. I will probably have to split it again and put a flywheel in it I guess, but I am going to have to use it like it is for now.

Share this post


Link to post
Share on other sites