Urgent question re: release bearing...
#1
Urgent question re: release bearing...
Can't seem to get a definitive answer on this. However, if anyone can answer this, I would greatly appreciate it.
When installed, the release bearing sits on the torque tube. When the torque tube is subsequently installed, is the release bearing supposed to rest on the pressure plate spring fingers shown in the below picture, or does it sit adjacent to them but spaced apart?
The release bearing is shown below:
When installed, the release bearing sits on the torque tube. When the torque tube is subsequently installed, is the release bearing supposed to rest on the pressure plate spring fingers shown in the below picture, or does it sit adjacent to them but spaced apart?
The release bearing is shown below:
Last edited by terminal_ac; 08-29-2018 at 05:55 PM.
#4
Understood about the spacer.
In truth, in an empty state, when the release bearing is full extended, it must touch the pressure plate fingers so as to compress. If the release bearing isn't compressed, which is achieved with the spacer, then the clutch cannot work.
In truth, in an empty state, when the release bearing is full extended, it must touch the pressure plate fingers so as to compress. If the release bearing isn't compressed, which is achieved with the spacer, then the clutch cannot work.
#5
I'm really confused by what you're saying. When you step on the clutch pedal, the release bearing is extended hydraulically and the 'donut' portion compresses the spring fingers on the clutch pack to disengage the clutch from the flywheel. And then when you release the pedal, the release bearing retracts allowing the spring to apply pressure to engage the clutch pack. I though your original question was whether or not the 'donut' touches the spring fingers when disengaged or if there is a small clearance. I would have thought there is a clearance.
Last edited by XJRS Owner; 08-30-2018 at 01:08 PM.
#6
I'm really confused by what you're saying. When you step on the clutch pedal, the release bearing is extended hydraulically and the 'donut' portion compresses the spring fingers on the clutch pack to disengage the clutch from the flywheel. And then when you release the pedal, the release bearing retracts allowing the spring to apply pressure to engage the clutch pack. I though your original question was whether or not the 'donut' touches the spring fingers when disengaged or if there is a small clearance. I would have thought there is a clearance.
Therefore, during installation, the release bearing MUST touch the pressure plates and compress. This is achieved by installing the space on the torque tube. Think in terms of an accordion. If you've consumed the extension range of your release bearing how can it extend to engage the pressure plate fingers? Get it?
So, when installing the release bearing, it must be compressed so that when the system is filled and bled pressing the clutch will allow it to extend. The spacer closes the distance to the pressure plate so that the release bearing will contact the fingers and compress. After the system is filled with fluid only then can you cause the release bearing to expand.
Hope I haven't confused the issue even more.
#7
On all clutch systems that I'm aware of there should be an air gap between the throw out bearing and the pressure plate springs/fingers when the pedal is released. The gap is so the bearing is not spinning when released. On racing cars I've worked on this is usually .100 of an inch, however I always check the spec. for the bearing being used.
For the systems provided by the AM vendors they should have included the correct spacer to provide the clearance as mentioned.
For the systems provided by the AM vendors they should have included the correct spacer to provide the clearance as mentioned.
Trending Topics
#8
This has been answered/solved. I'll explain tomorrow when I get my parts back.
At the end of the day, the parts touch. I need to get my released bearing to confirm something with respect to the touching parts. I'll explain once I get my parts back, which will happen tomorrow (i.e., Friday, August 31)
At the end of the day, the parts touch. I need to get my released bearing to confirm something with respect to the touching parts. I'll explain once I get my parts back, which will happen tomorrow (i.e., Friday, August 31)
#10
There are two options to get the VAP clutch to work in a 2015 Vantage V8. 1) Machine the torque tube to bring it back into compliance. 2) Obtain an "old style" torque tube via the Aston Martin exchange program.
In this case, we could not locate a machine shop that was willing or could even handle the process of machining the torque tube to remove about 6 mil of material. We took the second option, i.e., the old style torque tube.
Apparently, the torque tube is an "AMR" torque tube. This tube requires no spacer. (The car is back together and its shifting properly).
Thread
Thread Starter
Forum
Replies
Last Post
Don Nguyen
997 Turbo / GT2
1
08-27-2018 08:50 PM
Slider
996 Turbo / GT2
2
02-23-2014 09:35 AM