Swivel assembly design
1 - Rotary lever; 2 - The upper bolt of the axis of rotation of the wheel; 3, 6 - Distance rings; 4 - Adjusting washers; 5 - Hinged casing
Swing arm centering (1)
Measuring the gap «A» at the top pivot
Scheme of a rotary assembly for calculating the thicknesses of shims
1. Remove the hinge cover assembly with the drive shaft (see Section Removal and installation of drive shafts of the forward bridge).
2. Insert the appropriate guide ring from the special repair kit into the sleeve of the crankcase of the bridge - the ring should be pressed against the carrier bearing race without any play.
3. If necessary, center the pivot arm with a center punch (1).
4. Install the top pivot bolt (2) with 2 mm distance ring (3) and without shim (4).
Note. The lower bolt with the last five millimeters of tension is planted in the assembly of the hinged casing (5), therefore, before measuring the shims, a 6 mm spacer must be installed between it and the inner race of the bearing. Another ring, 4 mm thick, must be seated between the pivot arm and the hinged cover.
5. Set the bolt into the lever just enough to fully take up the existing play in the swivel bearing.
6. To shrink the bearing, rotate the hinged casing in different directions.
7. Using a blade-type feeler gauge, measure the gap «A» between casing (5) and bolt (2), then using the remote ring (6) determine clearance «IN» between casing (5) and swivel lever (1), - write down the measurement results.
8. Calculate the thickness of the shims according to the following scheme:
Upper swivel
- Gap «A» = 1.30 mm
- Adjustment ring = 2.00 mm
- Bearing preload = 0.15 mm
- Estimated shim thickness = 2.00 - 1.30 + 0.15 = 0.85 (mm)
Lower swivel
- Gap «IN» = 1.10 mm
- Distance ring thickness difference = 6 - 4 = 2.00 (mm) (see note above)
- Bearing preload = 0.15 mm
- Estimated shim thickness = 2.00 - 1.10 + 0.15 = 1.05 mm
9. Remove the guide ring and reinstall the pivot housing assembly in the drive shaft (see Section Removal and installation of drive shafts of the forward bridge).
10. Further installation is carried out in the reverse order to the dismantling of the components.