Ο χρήστης zoranb έγραψε:
Αυτό το πόστ φίλε leonp για τους δίσκους και το τρέμουλο στο πεντάλ πού κολλάει, έχει να κάνει με το βίδωμα?
*Brake Rotor Pulsation: Causes. [Comments from Wagner Brake div. Of Cooper Industries:] Brake rotor thickness variation causes brake vibration due to changes in the braking force as thick and thin portions of the rotor pass between the pads. Eric Smith, Senior Instructor for Wagner Brake at the Moog World Training Center in St. Louis, says technicians sometimes pin the blame on a defective rotor, but often it's due to excessive system run-out, which has not been checked by the technician.
Smith says the run-out will cause the rotor to wear itself out of parallel, and is why turning or replacing the rotor won't solve the problem. System run-out can be caused by poor mating of flanges between the hub and rotor when assembled as a unit ( by excessive rust, preventing a clean fit of the rotor on the flange), excessive run-out and even improper torqueing of the wheel bolts. Once the rotor heats up during operation, if one lug is a little less tight that the others, the rotor will expand at that point and cause run-out, says Smith. Compounding this is the fact that the brake might only have run-out when the rotor is hot. When the customer takes the car back to the shop, it's cooled when checked by the technician and by that time the run-out disappears. If not corrected, though, it will eventually have a permanent run-out, and be worn out of parallel.
Make sure rotor run-out is below specifications before reinstallation; also make sure the hub is clean and rust free before installing the rotor. System run-out should be checked after installing the rotor (new or turned). If run-out is above spec, the solution may be as easy as re-indexing the rotor one stud at a time, until run-out is within spec. It may also be necessary to replace the hub assembly. *