Clutch throw-out bearing release lever pivot point fork breaking

   / Clutch throw-out bearing release lever pivot point fork breaking #1  

Raw Bone

New member
Joined
Jun 28, 2009
Messages
11
OK guys , here is my situation . I own a Jinma 254 and I知 having a problem with the clutch throw-out bearing release lever pivot point fork breaking. I致e included a few photos hopefully to better show exactly where the problem is . These are not photos of my tractor I downloaded these from the internet for
illustration purposes.
I replaced the first broken fork without splitting the tractor through the inspection hole in the bell-housing. It worked fine for a couple of months and now
the one I replaced has broken again. These forks are cast pieces and have broken at the casting lines. Have anyone else had a similar problem?

02 Clutch T-O.jpg 00 Clutch T-O bearing lever arm pivot fork Item 13 on parts list.jpg
 
   / Clutch throw-out bearing release lever pivot point fork breaking #2  

AWSubie

Platinum Member
Joined
Jun 9, 2013
Messages
659
Location
Fort Worth, Texas
Tractor
Ford 2N, Kioti NX5010 HST Cab
It is possible that the fork breaking is a symptom of another issue such as high friction either at the transmission spline or the pivot bolt (or both locations) due to lack of lubrication or wear. When you depress the clutch pedal is the travel smooth?
 
   / Clutch throw-out bearing release lever pivot point fork breaking #3  

staggerwing56

New member
Joined
Mar 8, 2022
Messages
2
Tractor
Jinma 284
OK guys , here is my situation . I own a Jinma 254 and I知 having a problem with the clutch throw-out bearing release lever pivot point fork breaking. I致e included a few photos hopefully to better show exactly where the problem is . These are not photos of my tractor I downloaded these from the internet for
illustration purposes.
I replaced the first broken fork without splitting the tractor through the inspection hole in the bell-housing. It worked fine for a couple of months and now
the one I replaced has broken again. These forks are cast pieces and have broken at the casting lines. Have anyone else had a similar problem?

View attachment 619280 View attachment 619281
Where did you get replacement levers? I have the same problem with a 284 and the dealer would only sell us a whole new clutch for 700 bucks.
 
   / Clutch throw-out bearing release lever pivot point fork breaking #4  

pmsmechanic

Elite Member
Joined
Dec 6, 2013
Messages
3,664
Location
Southern Alberta, Canada
Tractor
4410 and F-935 John Deere, MF 245
My first thought is that there is something jamming somewhere. Maybe that's why the dealer wants you to buy a new clutch. The new one might have a lighter spring or heavier levers or be redesigned to eliminate the problem.
 
   / Clutch throw-out bearing release lever pivot point fork breaking #5  

ROUSTABOUT

Veteran Member
Joined
Jan 30, 2008
Messages
1,377
Location
Luther Willis Hill, AR
Tractor
Pettibone, Ford, Massey Ferguson, International, JD, David Bradley, home mades
OK guys , here is my situation . I own a Jinma 254 and I知 having a problem with the clutch throw-out bearing release lever pivot point fork breaking. I致e included a few photos hopefully to better show exactly where the problem is . These are not photos of my tractor I downloaded these from the internet for
illustration purposes.
I replaced the first broken fork without splitting the tractor through the inspection hole in the bell-housing. It worked fine for a couple of months and now
the one I replaced has broken again. These forks are cast pieces and have broken at the casting lines. Have anyone else had a similar problem?

View attachment 619280 View attachment 619281

Just make one out of steel, not cast. I have a clutch fork I made in 1989 and its still working. It's behind a 15" clutch.
 
   / Clutch throw-out bearing release lever pivot point fork breaking #6  

staggerwing56

New member
Joined
Mar 8, 2022
Messages
2
Tractor
Jinma 284
Thought about having a few made up on a CNC. But found new ones at affordable tractor in Texas for 20 bucks ea. Calling in am to confirm will work on 8 inch clutch. Can't beat the cost.
 
   / Clutch throw-out bearing release lever pivot point fork breaking #7  

pycoed

Silver Member
Joined
Mar 28, 2007
Messages
137
Location
West Wales UK
Tractor
Zetor 7045; Wheelhorses C121, C101, A8;Cushman Turf truckster
May be worth annealing the new casting thoroughly before you fit it? If you have a wood stove, put it in there & heat it up to dull red for a while, then let it cool down as slowly as possible - keep immersed in the wood ash, or let the stove go out by itself if that is practicable. Should soften up the casting nicely. Another forum I frequent has a member do this to a small engine casting that he couldn't machine. Chilled iron can be glass hard & similarly brittle. He successfully annealed the casting as above & said it machined perfectly afterwards.
 
 
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