Redneck in training
Elite Member
The pin that hold the fork on the shaft is sheared.
Please help with clutch issue
- Thread starter Hinomotoman
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OP
Hinomotoman
Gold Member
- Joined
- Jul 9, 2009
- Messages
- 258
- Location
- Western NC
- Tractor
- LS R3039, Hinomoto E2604, Hinomoto N239, Case IH 1140, White Field Boss 31
The tractor in the avitar is not the one I'm working on. I did not unpin the fork. If it had been unpinned, you couldn't put it on 180 degrees off because it has 2 spring clips that attach it to the fork. The driveshaft is one piece. The only way to get it out is move the front axle forward or the transmission back. It doesn't go through the clutch.
Eugene
Eugene
Redneck in training
Elite Member
If the pin is sheared then the shaft rotates inside the fork and will not disengage the clutch. It might not be apparent unless you remove the pin or test it some way. There is also a lever outside of the housing that might be also pinned or clamped on the shaft. You need to check both.
OP
Hinomotoman
Gold Member
- Joined
- Jul 9, 2009
- Messages
- 258
- Location
- Western NC
- Tractor
- LS R3039, Hinomoto E2604, Hinomoto N239, Case IH 1140, White Field Boss 31
There are 2 pins in the fork. The fork has full range of motion on the collar. The lever outside of the bell housing is also pinned. I removed the outside pin and there's no play in the hole(as iI keep saying, only 700 hours). The inside pins and fork are rusted solid to the shaft. This didn't happen overnight. The clutch quit working while I was using the tractor. The clutch is working now. I'll just get a piece of threaded rod from work and make a rod about an inch longer and everything will be fine.
Eugene
Eugene
rbargeron
Elite Member
This really sounds like there are some small differences in the thickness of the new clutch disk or in the geometry of the new pressure plate. Also, did you mention that the flywheel was newly-machined? Any idea how much they took off? The pressure plate multiplies any thickness differences.
Not to ruin your day, but there is another long-shot possibility here. One of the engine's main bearing shells has thrust flanges on it to keep the crank in position axially. The flanges can wear out - allowing the crank to gradually move forward, away from the release bearing. On some engines, the pistons and wrist pins can tolerate this for a while without symptoms (except clutch adjustment). It's not a good way to run because crank thrust bears directly against the iron web. Tractors with separate lever-operated pto clutches often came with a warning not to constantly run with the pto disengaged - because the clutch spring force was always pushing the crank against the thrust bearing.
As always, prompt cheerful refund if theory is bogus. Dick B
Not to ruin your day, but there is another long-shot possibility here. One of the engine's main bearing shells has thrust flanges on it to keep the crank in position axially. The flanges can wear out - allowing the crank to gradually move forward, away from the release bearing. On some engines, the pistons and wrist pins can tolerate this for a while without symptoms (except clutch adjustment). It's not a good way to run because crank thrust bears directly against the iron web. Tractors with separate lever-operated pto clutches often came with a warning not to constantly run with the pto disengaged - because the clutch spring force was always pushing the crank against the thrust bearing.
As always, prompt cheerful refund if theory is bogus. Dick B
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