FYI: How pressure plates work
- theholycow
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FYI: How pressure plates work
I found a couple interesting exploded views.
The second one doesn't seem to show pivots but seems to have a better diaphragm spring picture.
The second one doesn't seem to show pivots but seems to have a better diaphragm spring picture.
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watkins wrote:Humans have rear-biased AWD. Cows have 4WD
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Re: FYI: How pressure plates work
the only one that made sense to me was the one on howstuffworks. once you see how it all moves you just go "oooh now it makes sense...duh"
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Re: FYI: How pressure plates work
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2017 Cannondale Quick 3
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Re: FYI: How pressure plates work
yeah what he said
- theholycow
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Re: FYI: How pressure plates work
That one tells how a clutch system works, but it didn't explain how a pressure plate works.
Here's what caused me to look it up:
After reading HowStuffWorks and every other explanation, I was left with the impression that when you step on the third pedal the release bearing pulls the clutch disc away from the flywheel or pulls the pressure plate away from the clutch disc.
However, while putting together my clutch I could see that when you step on the pedal the release bearing pushes on the clutch cover assembly. I couldn't figure out how that would remove pressure instead of adding pressure. The only thing I could think of would be some kind of pivot but staring at the assembly I was unable to identify it.
The drawings I posted filled in the missing info for me.
Here's what caused me to look it up:
After reading HowStuffWorks and every other explanation, I was left with the impression that when you step on the third pedal the release bearing pulls the clutch disc away from the flywheel or pulls the pressure plate away from the clutch disc.
However, while putting together my clutch I could see that when you step on the pedal the release bearing pushes on the clutch cover assembly. I couldn't figure out how that would remove pressure instead of adding pressure. The only thing I could think of would be some kind of pivot but staring at the assembly I was unable to identify it.
The drawings I posted filled in the missing info for me.
1980 Buick LeSabre 4.1L 5MT
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watkins wrote:Humans have rear-biased AWD. Cows have 4WD
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Re: FYI: How pressure plates work
^ and the straps help pull the pressure plate away from the clutch disk and torsionally link it to the cover.
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Re: FYI: How pressure plates work
Ah, an even better picture:
The same site where I found that also explained what those little coil springs in the clutch disc are. The hub is connected to the friction material via those springs; the springs cushion clutch engagement by compressing.
The same site where I found that also explained what those little coil springs in the clutch disc are. The hub is connected to the friction material via those springs; the springs cushion clutch engagement by compressing.
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watkins wrote:Humans have rear-biased AWD. Cows have 4WD
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Re: FYI: How pressure plates work
Ready for understanding self-adjusting clutch covers now?
The cover adjusts the geometry of the pivot for the diaphragm spring, so the clutch pedal effort remains fairly constant for the life of the vehicle instead of increasing over time as the clutch disk wears thinner.
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Re: FYI: How pressure plates work
Wouldn't self-adjusting hydraulic clutch actuation make that obsolete?
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watkins wrote:Humans have rear-biased AWD. Cows have 4WD
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Re: FYI: How pressure plates work
The hydraulic self adjust will make up for any changes to the required range of motion of the release bearing due to clutch disk wear or system component tolerances, but a self-adjusting clutch cover will keep the diaphragm spring geometry relatively constant throughout the life of the clutch. Normally, as the clutch disk wears, the pressure plate moves closer to the flywheel and the diaphragm spring fingers move away from the flywheel and the geometry of the fingers to the release bearing and the fingers to the pressure plate changes and results in increased pedal force being required to release the Kraken.theholycow wrote:Wouldn't self-adjusting hydraulic clutch actuation make that obsolete?
'08 Jeep Liberty 6-Speed MT - "Last of the Mohicans"