Kontrol af hjulnavets sidekast | HELLA

GenereltI forbindelse med fejlfinding på skivebremserne og inden der monteres nye bremseskiver, bør der også foretages en kontrol af hjulnavets sidekast iht. til bilfabrikantens forskrifter.Kontrol af hjulnavetVi anbefaler følgende fremgangsmåde ved kontrol af hjulnavets sidekast.Forberedelse af hjulnavet:Kontroller anlægsfladen for korrosion og skaderKontroller gevind for skaderFjern urenheder og spor af korrosionAnlægsfladen på hjulnavet skal altid være uden skader, fri for rust og metallisk blank.Kontrol:Fastgør et måleur med holder på fjederbenetSæt målespidsen mod den yderste kant af hjulnavetDrej hjulnavet langsomt og jævnt i kørselsretningenAflæs måleværdierneVariationerne, målt over flere omdrejninger, må ikke overstige 0,03 mm. Hvis afvigelsen er større, skal hjulnavet udskiftes.ServiceanvisningKontrollen skal foretages, inden der monteres nye bremseskiverUjævnheder i anlægsfladen på hjulnavet kan medføre, at bremseskiven deformeres, og dermed at den kaster sideværts!Et givet sidekast på navet medfører et sidekast, der er dobbelt så stort ved bremseskivens yderkantI den forbindelse skal bilfabrikantens vedligeholdelses- og reparationsanvisninger følges.

As part of troubleshooting on the brake disc system, as well as before fitting new brake discs, the axial runout of the wheel hub should also be checked according to the specifications of the vehicle manufacturer.

Testing the wheel hub

To test the lateral runout of the wheel hub, we recommend the following procedure.

Prepare the wheel hub:

Check surface for corrosion and damage
Check thread for damage
Remove contamination and traces of corrosion
The contact face of the wheel hub must be undamaged, rust-free, clean and bright

Test:

Fasten the dial gage with holder to the suspension strut
Align the dial gage at the outer edge of the wheel hub
Turn the wheel hub slowly and at a constant speed in the direction of travel
Read off the measured values

Measured over several wheel revolutions, deviations should not exceed 0.03mm. If the deviations are greater, the hub should be replaced.

Checking the lateral runout of the wheel hub- Image 1

Maintenance information

This test should be carried out before mounting the new brake discs
Unevenness on the contact face of the wheel hub can lead to warping of the brake disc and therefore axial runout.
Any hub runout present will cause twice the disc runout at the outer edge of the brake disc

Please observe the specifications in the maintenance and repair notes provided by the respective vehicle manufacturer.

Technical information and practical tips have been compiled by HELLA in order to provide professional support to vehicle workshops in their day-to-day work. The information provided on this website is intended for use by suitably qualified personnel only. Reprinting, distribution, reproduction, exploitation in any form or disclosure of the contents of this document, even in part, is prohibited without our express, written approval and indication of the source. The schematic illustrations, pictures and descriptions serve only for the purposes of explanation and representation of the instructions and cannot be used as a basis for installation or assembly work. All rights reserved.