Calculating shim and installing in rear axle housing - AR35.31-P-0550-13D

Use data sheet: ↓ 

Data sheet, gear set adjustment of rear axle: order no. B20.650.06.080.00B 

Fig 1: Identifying Gauge Stand (363 589 02 21 00)

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Fig 2: Identifying Measuring Plate (601 589 00 23 00)

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Fig 3: Identifying Measuring Device (116 589 07 21 00)

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Fig 4: Identifying Measuring Device (116 589 01 21 00)

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Fig 5: Identifying Gauge Stand (111 589 08 23 00)

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Fig 6: Identifying Adjustment Gauge (115 589 05 21 00)

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1. Clamp commercially available dial gauge in gauge stand 363 589 02 21 00 and mount on measuring plate (031) 601 589 00 23 00.
2. Adjust dial gauge on gauging member (051b) 116 589 07 21 00 part 09 to "0"  with approx. 3 mm  preload so that the height of the gauging member "B1"  is adjusted.

   

   There are two  versions of the gauging member (051b) which differ in height by 0.46 mm. The height of the gauging member is engraved on the end face and is 74.51 mm on the 1st version and 74.05 mm on the second version  . Both versions are only valid for calculating the shim thickness "S"  (refer to work step 5 and examples 1 and 2).

   Fig 7: Identifying Gauging Member And Measuring Plate

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3. Mount tapered roller bearing outer race (46b) on the tapered roller bearing inner race of drive pinion (47) and attach magnetic plate (020b) 116 589 01 21 00 part 04.
4. Install drive pinion in the measuring plate and measure the height of the drive pinion with tapered roller bearing and magnetic plate.
5. Entering figure 1 in the data sheet. 

   Read off the difference between height of gauging member "B1"  and height of the drive pinion with magnetic plate "B"  .

   (e.g. 1st version -0.38 mm for a gauging member height of 74.51 mm and 2nd version  +0.08 mm for a gauging member height of 74.05 mm).

   Fig 8: Identifying Outer Race, Drive Pinion And Magnetic Plate

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   A correction value of 1.5 mm  is to be taken into account for a height of bevel gear head of 39 mm:

   The amounts of the measured values of the difference between "B1" and "B" which are in the negative range (counter-clockwise deviation of dial gauge pointer) are to be added to the correction value.

   (e.g. measured value -0.38 mm measured at a height of gauging member of 74.51 mm gives: 1.5 mm  + 0.38 mm = 1.88 mm).

   The amounts of the measured values of the difference between "B1" and "B" which are in the positive range (clockwise deviation of dial gauge pointer) are to be subtracted from the correction value.

   (e.g. measured value +0.08 mm measured at a height of gauging member of 74.05 mm gives:

   1.5 mm  - 0.08 mm = 1.42 mm)

6. Enter the value thus calculated in the data sheet under figure 1
7. Entering figure 2 in the data sheet. 

   Read off the basic deviation "a"  of the drive pinion (+ or -) and enter in the data sheet under figure 2 (e.g. +0.15).

8. Calculating sub-total in the data sheet. 

   Add (+) or subtract (-) values from figure 1 and figure 2 depending on the prefix (+) or (-) of the value on the drive pinion.

   Fig 9: Identifying Drive Pinion

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9. Install gauging member (051b) 116 589 07 21 00 part 09 of the measuring device in the rear axle housing. Screw on gauging member with attachment piece 116 589 07 21 00 part 01 and hexagon nut.
   Fig 10: Identifying Gauging Member

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10. Install dial gauge with gauge stand (022) 111 589 08 23 00 in adjustment gauge (023) 115 589 05 21 00 and position on "0"  with 3 mm  preload.
    Fig 11: Identifying Gauge Stand And Adjustment Gauge

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11. Install measuring device (020a) 116 589 01 21 00 part 01 in the left bore of the rear axle housing and tighten securely.
12. Insert gauge stand (022) with dial gauge in measuring device and read off deviation.
    Fig 12: Inserting Gauge Stand With Dial Gauge

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13. 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 under figure 3 in the data sheet in the positive (+), or negative (-) direction (e.g. for a height of gauging member of 74.51 mm: +0.04  mm measured and thus in the positive direction or for a height of gauging member of 74.05 mm: -0.42  mm measured and thus in the negative direction).

    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  .

14. Calculating thickness of shim "S" in the data sheet. 

    Add (+) or subtract (-) the sub-total of the values from figure 1 and figure 2 as well as the value from figure 3. The value calculated gives the thickness of the shim.

    Fig 13: Identifying Gauging Member And Center Of Ring Gear

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    Fig 14: Data Sheet Calculating For Shim Thickness

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15. Remove measuring device from the rear axle housing and detach gauging member.
16. Install shim (45) with the calculated shim thickness "S"  in the rear axle housing.

    

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

    Fig 15: Identifying Shim

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