Jump to content
Sign in to follow this  
hardknocks

split 1086 twice now probably 3rd

Recommended Posts

a local shop replaced clutch in my 1086 well it wore the fingers out in less than year of use. I believe he had it adjusted so the trow out bearing was turning alll the time. 
have a 1086 done split it twice cant get enough travel to release clutch unless throw out bearing is turning 100% of the time. if you adjust throw out bearing where it doesnt turn it will not release clutch and cant get it in gear. here is what ive done 
1 replace pressure plate cause fingers was gone 
2 clutch disk was like new no wear. measeured .495 
3 replaced throw out bearing sleeve 
4 replaced clutch release fork 
5 replaced clutch release shaft 
6 replaced booster output rod and clevis 
7 adjusted booster top rod 
8 adjusted output rod so bell crank be 90 degrees 
9 adjusted T/A and dump valve 
put dial indicator on throwout bearing and had .497 of travel 
flyweel step is in spec 
fingers adjusted to 5/8" 
the only thing i can come up with is the new pressure plate is not made correctly. reason i say that is ,this is the 3rd clutch kit i have bought from this company and all had issues similialer 
could it be a problem not replacing clutch and pressure plate from same company?. i just replaced pressure plate only.

Share this post


Link to post
Share on other sites

The clutch disk may look like new with no wear, but is it flat? If they didn't have the splines aligned during installation they may have shoved on it and bent it giving it a profile like a disc blade. (best way I can think to describe it). That will cause the symptoms you are describing.  Also, is your trans brake adjusted correctly and in good condition?

Share this post


Link to post
Share on other sites

How many times has flywheel been ground? Every time it moves the clutch assembly farther from the optimal release travel and geometry of throw out assembly.

I would install an assembly from same clutch supplier. Replace flywheel most likely. Hard to believe but these tractors are 40ish years old. 

To be able to get the clearance on throw out bearing and clutch fingers and not worry about, use a spring to help with the slack on all the linkage. I dont worry so much about a certain pedal freeplay measurement. I make sure bearing has clearance  and clutch releases. Then I adjust tranny brake and dump valve, my opinion and method......right or wrong.....it works😁

Edit, also make sure your cab isomounts are good, they can effect  your travel of throw out bearing as you push clutch pedal down.

20190624_090821.jpg

Share this post


Link to post
Share on other sites

Check to see if the flywheel step height is correct. If the flywheel has been surfaced

and the flywheel step was not cut it can get the finger height incorrect. Also check the finger

height with clutch bolted in flywheel. I have got at least two reman clutchs that the the finger

height was not set correctly and had to readjust the fingers to the correct height.

Share this post


Link to post
Share on other sites

I would say the flywheel has been ground too many times like 815 said. It's not the correct way to do it, but the only thing you could do to get by without splitting it right now would be to pull the bolts that the throw out bearing pushes on and replace them with longer ones. Otherwise it needs to be split and flywheel replaced. 

Share this post


Link to post
Share on other sites

just found out that the pressure plate manufacture clutch disk is .460  and the clutch disk i have is .497  so that should be my difference the fingers are a 3-1 ratio so that should give me the clearance

Share this post


Link to post
Share on other sites

I do not understand your last post but it really sounds like cab mounts to me. I use the later style ones which are more solid.

Share this post


Link to post
Share on other sites
On 6/24/2019 at 5:24 PM, R190 said:

I do not understand your last post but it really sounds like cab mounts to me. I use the later style ones which are more solid.

i talked to the manufacture of my pressure plate.  which it is a brand new pressure plate  (NOT REBUILT) they make them to OEM specs  you basically have to use there clutch disk because it is .460 thick.  they told me that when a pressure plate is rebuilt that the clutch disk has to be thicker to make up the diffrence from what they turned off the pressure plate. all i did was replace my pressure plate and not the clutch disk from the manufacture of the pressure plate.  so apparantly i had a rebuilt clutch assembly in there iniitally. my clutch disk was perfect.i decided to reuse it.  so when i measured my clutch disk it measured .497 so that make my disk .037 thicker. the manufacture of my new pressure plate  was saying ..since i used my old clutch disk it is to thick for my new pressure plate from them and it wont let it release. its only .037 thicker but the fingers are a 3 to 1 ratio so that makes the travel of .111 ..close to 1/8" further travel.  i hope that clears it up.

Share this post


Link to post
Share on other sites

The amount of finger travel to release the clutch should be the same regardless of disc thickness, except that with a thicker disc the fingers will be closer to the pressure plate. You say you adjusted the fingers. The IH book says that finger height should be 2.301". At what angle is the release fork when the bearing is against the fingers? If it is cranked way far ahead you will lose travel due to the geometry of the fork turning too far ahead. Otherwise, you are still loosing travel somewhere. Is your linkage bellcrank directly on the bellhousing, or the new style mounted to the cab?

  • Like 1

Share this post


Link to post
Share on other sites

do you have the measuremnet for the flywheel . wanting to see if maybe it has been resurfaced to much i havent put a depth gauge on it but it looks like it is about .005 step left from the un cut service . what is a new flywheel measurment

Share this post


Link to post
Share on other sites
50 minutes ago, hardknocks said:

do you have the measuremnet for the flywheel . wanting to see if maybe it has been resurfaced to much i havent put a depth gauge on it but it looks like it is about .005 step left from the un cut service . what is a new flywheel measurment

1342779306_IMG_31271.thumb.JPG.9754795cf437c9786b0c072a5ba7dce9.JPG

Okay, measurement "A", from the crankshaft contact surface to the clutch disc contact surface... New measurement is 1.562 in. Minimum measurement is 1.482 in.

Hope this helps.

Travis

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...