The selection of the thickness of the adjusting ring is carried out when replacing one of the following parts: differential box, differential bearing, clutch housing or gearbox.
Pic. 75. Adjustment ring selection
Determine the thickness of the adjusting ring in the following sequence:
- press the outer ring of the tapered roller bearing 3 together with the adjusting ring 4 (pic. 75) into the gearbox housing. The setting ring 4 has a constant thickness of 1.25 mm;
- press the outer ring of the other differential bearing into the clutch housing. At the same time, make sure not to confuse the outer rings of the differential bearings;
- install the differential in the gearbox housing and, closing it with the clutch housing, tighten the nuts securing the gearbox to the clutch housing with a torque of 2.5 kgf-m, after which the differential is rotated for self-alignment of the bearings by 2-3 turns;
- install the support mandrel 2 on the differential box and fix indicator 1 with an extension using a universal holder. The indicator leg is installed on the support mandrel with a preload equal to 1 mm, and the indicator is fixed in this position, and its arrow is set to zero;
- move the differential from below and monitor the indicator reading. When measuring the axial displacement of the differential, it must not be rotated so as not to distort the measurement results.
According to the formula S \u003d A + B + C, the thickness of the differential bearing adjusting ring is calculated. In this formula, S is the thickness of the adjusting ring; A - axial movement of the differential; B - differential bearing preload; C - thickness of the adjusting ring (constant value).
Example. The indicator reading when the differential is moved is 1.00 mm. Differential bearing preload is 0.25 mm, adjusting ring thickness is 1.25 mm
S = 1,00 + 0,25 +1,25 = 2,50
After determining the thickness of the adjusting ring, the clutch and gearbox housings are disconnected, the differential is removed, the outer bearing ring is pressed out of the gearbox housing, and the selected adjusting ring is installed instead of the adjusting ring 9. The outer ring of the differential bearing is pressed in, the differential is installed in the gearbox housing and, having closed it with the clutch housing, the nuts securing the gearbox to the clutch housing are tightened.
Check with a dynamometer 02.7812.9501 the moment of resistance to turning the differential. To do this, pass the tip of the dynamometer through the hole in the differential box (for wheel drive shaft) up to the girth of the axis of the satellites. Turn the handle of the dynamometer several turns clockwise and on the scale determine the moment of resistance to turning. It should be: for new bearings 15-35 kgf-cm, for worn-in bearings at least 3 kgf-cm.