Subject: Re: bearing damage?
Author: Todd Nordwig
Date: Apr 21, 2005, 6:12 PM
Post ID: 1718742339
| Patrick Hayes wrote: |
| The exposed portion of the throwout plunger shoult NOT turn under any circumstances. That's why we have a bearing inside. If the exposed outer body does spin, it is a HUGE indicator that the bearing is toast. The crankshaft, flywheel and clutch are all spinning. You pull in on the hand lever and a long rod from the back of the transmission gets pushed against the center portion of the spinning clutch. This throw out rod makes contact and immediately begins to spin in synch with the clutch. At the back end of this rod is a bearing. Older 4-speeds had a caged roller affair. Newer 5-speeds have a radial needle affair. The bearing is there to allow the throwout rod to spin while the back portion or outer body is stationary. The outer body is pushed by the transmission lever and it should not spin. Something has to give in the middle and that is what the bearing is for. When the bearing fails, it now prevents the long rod from spinning. Since the clutch is still spinning, the stationary rod begins to act like a very blunt drill bit. It either overheats and welds itself to the clutch. Or it overheats and shortens its length so that it fails to function. Or, in rare case, it literally drills a hole through the center of the clutch. Patrick Hayes Fremont CA |
Well, Patrick, I guess this answers my question......thanks for taking the
time to help out.
Next question......how big a deal is it to repair this and is there an up
grade bearing unit that can
be used? And why did this one fail at 6000 miles?
Todd (learning something everyday)
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