Check Ring Gear/Drive Pinion Contact Pattern - AR35.30-P-0475-02GW
MODEL 463
as of Model Year 2013 /MOPF 2012
| Number | Designation | Order number |
|---|---|---|
| BR00.45-Z-1002-07A | Prussian Blue | - |
- Coat two teeth of ring gear (offset by 180°) with blue ink.
- Turn the drive pinion forwards and backwards while braking the ring gear with the retainer
.
- Compare the contact pattern with the following illustrated examples and if necessary perform the appropriate remedial action.
Precondition: Inspection of the contact pattern performed under load (ring gear braked).
An ideal contact pattern is rarely obtained in practice. It is, however, important to ensure that the contact pattern on the tooth face does not extend to the outside edge of the tooth at any point.
Ideal contact pattern
Cause: Installation distance (basic dimension) of drive pinion too small.
Remedy: Slightly increase the installation distance (basic dimension) of the drive pinion and repeat the test of the gear backlash, if necessary readjust the gear backlash.
Contact pattern on base of tooth flank (impermissible contact pattern)
Cause: Installation distance (basic dimension) of drive pinion too large.
Remedy: Slightly reduce the installation distance (basic dimension) of the drive pinion and repeat the test of the gear backlash, if necessary readjust the gear backlash.
Contact pattern on crown of tooth flank (impermissible contact pattern)
Cause: Gear backlash too big.
Remedy: Adjust the gear backlash and repeat the gear backlash test.
Contact pattern on tooth heel (impermissible contact pattern)
Cause: Gear backlash too small.
Remedy: Adjust the gear backlash and repeat the gear backlash test.
Contact pattern on tooth toe (impermissible contact pattern)