Adjusting Drive Pinion

Adjusting drive pinion

NOTE: The setting dimension "E" is indicated on the ring gear.

1. Install drive pinion without shims "S3" and tighten all pan head screws of bearing assembly to 50 Nm (37 ft lb).





2. Rotate adjustable stop ring along with spindle towards measuring plunger as far as it will go and set second setting ring to dimension"a".





Legend
a 30 mm

3. Assemble measuring mandrel and set with master gauge VW 385/30 to setting dimension "E" (64.05 mm in the example).
- Set dial gauge (3 mm measuring range) to zero with 1 mm preload.





4. Put gauge block plate 9281 on drive pinion head and insert measuring mandrel with dial gauge towards transmission side cover into transmission case.
- Dial gauge extension points towards center of drive pinion.
5 Fit transmission side cover without shaft seal and sealing ring and tighten crosswise with 4 hexagon head bolts.

NOTE: Do not use a hammer when fitting the transmission side cover (the gauge block plate held by magnets might fall off). Locate cover in correct installation position only by tightening the hexagon head bolts uniformly.

6. Using a socket wrench (24 mm A/F, e.g. Stahlwille No. 10 750), pull adjustable centering disc over spindle towards the outside until the measuring mandrel can just about be turned.
7. Turn measuring mandrel carefully until the dial gauge extension is vertical to the face of the drive pinion head. At this point, the pointer of the dial gauge is at its maximum deflection (reversing point) and the dial gauge must now be read.

NOTE:
- The measured value always deviates from the set dimension in clockwise direction (small pointer on the dial gauge is between 1 and 3), i.e. if the dial gauge is set with a preload of 1 mm, the value deviating from 1 is taken as the shim thickness "S3" to be inserted.
- Always round up or down to the nearest 0.05 mm (e.g. 1.63 to 1.60 mm).

8. After inserting the required shims, check the setting value "E" once again.
- A deviation of ± 0.03 mm is permissible.