Pinion Depth

Calculate shim (45) for pinion bearing outer race and insert in rear axle housing as follows:

1. Use data sheet, gear set adjustment of rear axle: order no. B20.800.98.113.00C, or equivalent





2. Clamp commercially available dial gauge on gauge stand tool No. 363 589 02 21 00 and mount on measuring plate tool No. 140 589 16 23 00, or equivalents
3. Adjust dial gauge on gauging member tool No. 140 589 14 21 00 (051b) part 01 to "0" with approx. 3 mm preload, thereby adjusting the height of the gauging member B1





4. Mount the tapered roller bearing outer race (46b) on the tapered roller bearing inner race of the drive pinion (47) and attach magnetic plate tool No. 140 589 41 63 00 part 03 (052c), or equivalent
5. Install drive pinion in the measuring plate and measure the height of the drive pinion with tapered roller bearing and magnetic plate.





6. Entering figure 1 in the data sheet.
- Read off the difference between the height of the gauging member "B1" and the height of the drive pinion with magnetic plate "B" and enter in the data sheet under figure 1 (e.g. 1.79 mm).
7. Entering figure 2 in the data sheet.
- Read off the basic difference "a" of the drive pinion (+ or -) and enter in the data sheet under figure 2 (e.g. +006).
8. Calculating interim total in the data sheet.
- Add (+) or subtract (-) values from number 1 and number 2 depending on the prefix (+ or -) of the value on the drive pinion.





9. Install gauging member tool No. 140 589 14 21 00 part 01 (051b), or equivalent, of the measuring device in the rear axle housing.
- Screw on gauging member with attachment piece 140 589 14 21 00 part 02 and hexagon bolt





10. Install the left measuring device race tool No. 140 589 41 63 00 part 01 (052e), or equivalent, from the outside inwards precisely up to the stop in the rear axle housing
11. Install the right measuring device race tool No. 140 5894163 00 pare 02 (052d), or equivalent, from the inside outwards precisely up to the stop in the rear axle housing





12. Install dial gauge tool No. 000 589 38 19 00 (052a) with measuring pin, or equivalent, in the measuring device 126 589 00 21 00 (052), or equivalent
- The measuring pin for the dial gauge is screwed into the adjusting piece (052b)
13. Press adjusting piece (052b) 126 589 00 21 00 part 10 against the measuring device and adjust dial gauge to "0" with 2 mm preload
- Tighten clamping screw securely, checking the "0" position of the dial gauge, and correcting if necessary.
14. Install measuring device from the left bore into the rear axle housing.
- When inserting the measuring device (052) into the rear axle housing, ensure the measuring pin of the dial gauge is not damaged in the bore.





15. Entering figure 3 in the data sheet.
- Measure the difference "A1" between the adjusted gauge dimension and the end face of the gauging member and enter in the data sheet under figure 3 in the positive (+) or negative (-) direction (e.g. -0.01 mm measured and thus negative direction)

NOTE:
^ The specification of the positive (+) or negative (-) direction is related to the direction of rotation of the dial gauge pointer.
^ The direction of rotation, starting from the zero position, opposite to clockwise thus means negative direction and clockwise means positive direction.

16. Calculating thickness of shims "S" in the data sheet.
- Add (+) or subtract (-) the interim total of the values from number 1 and number 2, as well as the value from number 3.
- The value calculated gives the thickness of the shim.

EXAMPLE
1. Measure difference of the height of the
Gauging member "B1" and the height of
the drive pinion with magnetic plate "B" = 1.79 mm
2. Read off basic difference "a" on the
drive pinion (plus or minus) = + 0.06 mm
= - 0.00 mm

Interim Total = 1.85 mm

3. Measure difference "A1"between the
adjusted gauge dimension and the
end face of the gauging member
Negative direction = + 0.06 mm
Positive direction = - 0.00 mm

Thickness Of Shim "S" = 1.86 mm





17. Remove measuring device and measuring device races from the rear axle housing.
- Remove gauging member.
18. Install shim with the calculated shim thickness 'S" in the rear axle housing.

CAUTION:
^ Only hardened shims may be used.
^ They are available in various thicknesses (refer to parts supplier)
^ If necessary, grind shim appropriately.