Shim "S4", Determining when Replacing Bearing Housing

Shim "S4", Determining when Replacing Bearing Housing

Special tools, testers and auxiliary items required

• Dial Gauge Holder (VW 387)

• Alignment Fixture (VW 792)

• Digital depth gauge (for example, (VAS 6087))

• Dial gauge

• Dial gauge extension 30 mm

• Straight-edge

- Clean the housing separating surfaces

- Place a straight-edge (for example, 19.50 mm high - 1 - on the housing separating surface.





- Measure the difference in depth - a - on the old and new bearing housing using the digital depth gauge (for example, ( VAS 6087)).

Example:





- Install thicker shim "S4", if new bearing housing is deeper.

- Install a thinner shim "S4" if the old bearing housing is deeper.

Example:





Available shims => [ Available adjustment shims for ] Pinion, Adjusting.

- Install the tapered roller bearing outer race with the shim " S4" into the bearing housing. => [ Installing Outer Race/Tapered Roller Bearing
into the Bearing Housing ] Pinion and Hollow Shaft.

- Install fully assembled drive pinion with hollow shaft into transmission housing.

- Mount the bearing housing and the transmission cover and tighten the bolts to 35 Nm.

- Turn drive pinion with hollow shaft against hollow shaft 5 rotations in both directions to settle the tapered roller bearings.

- Install the measuring tools, use the 30 mm dial gauge extension - A -, secure the screw - arrow - to the transmission housing and place an M12 nut between the (VW 792) and the transmission housing.





• Mount the dial gauge extension - A - on the ridge in the transmission cover.

- Set gauge (3 mm measuring range) to "0" with 1 mm pre-load.

- Loosen the screws on the transmission cover and turn the pinion.

- Dial gauge must now display the following value for correctly selected adjustment shims:

• 0.09 to 0.18 mm

If this value is not obtained, adjustment must be corrected.