ADJUSTMENT OVERVIEW (TRANSMISSION G 86)
When carrying out assembly work on the final drive, readjustment of the output shaft and crown wheel or drive set is necessary only if parts are being replaced which directly influence the adjustment of the final drive. In order to avoid unnecessary adjustment work, pay attention to the following table
| The following must be adjusted | Crown wheel (S1 + S2) | Output shaft (S3 + S4) over dimension "r" | Output shaft (S3 + S4) over actual measurement | Output shaft adjusting shim only S4 |
|---|---|---|---|---|
| Replaced part | ||||
| Transmission housing (1) | ||||
| Transmission case cover | X | |||
| Differential housing | X | |||
| Tapered roller bearing for output shaft | X | |||
| Tapered roller bearing for differential | X | |||
| Drive set | X | X | ||
| Cover for final drive | X | |||
| (1) If the transmission housing is replaced, it is also necessary to adjust the input shaft (see REMOVING AND INSTALLING FINAL DRIVE/TRANSMISSION HOUSING DOUBLE SEALING RING ) | ||||
| (1) | If the transmission housing is replaced, it is also necessary to adjust the input shaft (see REMOVING AND INSTALLING FINAL DRIVE/TRANSMISSION HOUSING DOUBLE SEALING RING ) |
DRIVE SETS ADJUSTMENT (TRANSMISSION G 86)
Scheme 13
If the output shaft and crown wheel have to be adjusted, it is best to follow the sequence below in the interest of rational working
- Determine the total disc thickness "Stot" (S1 plus S2) for the correct preload of the tapered roller bearings/differentials. (Scheme 13)
- Determine the total disc thickness "Stot" (S3 plus S4) for the correct preload of the tapered roller bearings/output shaft. (Scheme 13)
- Divide up the total disc thickness "Stot" in S3 and S4 so that the measurement from the crown wheel centre to the front of the drive pinion corresponds to the installation dimension "R" measured during production. (Scheme 13)
- Divide up the total disc thickness "Stot" in S1 and S2 so that the stipulated circumferential backlash is present between the crown wheel and output shaft. (Scheme 13)
The aim of the adjustment is to regain the position of maximum smooth running which was determined in production on the testing machine.
The greatest possible care and cleanliness during all assembly work and measuring procedures are essential requirements for a perfect result.