ShadowsPapa
Well-Known Member
- First Name
- Bill
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- Oct 12, 2019
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- Runnells, Iowa
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So these work backwards from prior hydraulic clutches?
In the older hydraulic clutches, they worked like brakes - you pushed the pedal which built pressure to the slave cylinder and the clutch was released.
Like brakes, if there was air in the system (they were not bled) you could never get the clutch to release because you could never build enough pressure to overcome the pressure plate force.
Lack of bleeding means air in the lines, air is compressible.
If you had air in the lines or in the slave or master cylinder, you compressed the air before building any pressure and ran out of pedal and the gears would grind because there wasn't enough travel to release the clutch.
Bleed the clutch system you get air out and then you can release the clutch fully.
In the systems I refer to - the clutch always had full force and could not be fully released.
If lack of bleeding - meaning there's AIR in the system, is the problem here - the hydraulic pressure holds the clutch engaged?????
Makes no sense to me.
Think of brakes - air in system (which is what bleeding REMOVES) means you can never fully apply the brakes as the air compresses, you can't build enough hydraulic pressure.
How does lack of bleeding keep the clutch from engaging IF this is a standard clutch pressure plate with springs holding it engaged?
Or is this some sort of clutch where hydraulic pressure KEEPS it engaged and there are no springs?
I've worked a fair share of hydraulic systems, including clutches, and replaced dozens of clutches over the years but this one must be some rocket science thing if lack of bleeding means it never fully applies.
Normally lack of bleeding means you can't release it fully and it drags.
Would love to see the schematic of the hydraulic system and a pic of the actual pressure plate.
In the older hydraulic clutches, they worked like brakes - you pushed the pedal which built pressure to the slave cylinder and the clutch was released.
Like brakes, if there was air in the system (they were not bled) you could never get the clutch to release because you could never build enough pressure to overcome the pressure plate force.
Lack of bleeding means air in the lines, air is compressible.
If you had air in the lines or in the slave or master cylinder, you compressed the air before building any pressure and ran out of pedal and the gears would grind because there wasn't enough travel to release the clutch.
Bleed the clutch system you get air out and then you can release the clutch fully.
In the systems I refer to - the clutch always had full force and could not be fully released.
If lack of bleeding - meaning there's AIR in the system, is the problem here - the hydraulic pressure holds the clutch engaged?????
Makes no sense to me.
Think of brakes - air in system (which is what bleeding REMOVES) means you can never fully apply the brakes as the air compresses, you can't build enough hydraulic pressure.
How does lack of bleeding keep the clutch from engaging IF this is a standard clutch pressure plate with springs holding it engaged?
Or is this some sort of clutch where hydraulic pressure KEEPS it engaged and there are no springs?
I've worked a fair share of hydraulic systems, including clutches, and replaced dozens of clutches over the years but this one must be some rocket science thing if lack of bleeding means it never fully applies.
Normally lack of bleeding means you can't release it fully and it drags.
Would love to see the schematic of the hydraulic system and a pic of the actual pressure plate.
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