Note. This operation must be carried out very carefully, since the thickness of the shim and gasket affect the position of the final drive gear. Measurements must be made with the outer races of the bearings pressed to the stop.
To select the thickness of the bearing adjusting rings, it is necessary to determine the following dimensions:
- a - protrusion of the input shaft ball bearing from the gearbox housing;
- b - protrusion of the tapered roller bearing of the secondary shaft from the gearbox housing;
- c - drowning of the supporting surface of the rear bearing of the secondary shaft in the rear cover of the gearbox;
- d - drowning of the bearing surface of the rear bearing of the input shaft in the rear cover of the gearbox;
- s is the thickness of the adjusting ring of the rear bearing of the secondary shaft;
- v is the thickness of the adjusting ring of the input shaft rear bearing;
- e is the thickness of the gasket.
Determine dimensions with a depth gauge «A», «b», «With» And «d».
The rear bearings of the primary and secondary shafts are installed with a preload of 0.10 mm.
Thickness «e» sealing gasket is constant and is 0.40 mm. The thickness of the shims is calculated using the following formulas:
s = c - b + 0.30 mm
v = d - a + 0.30 mm
The scheme for selecting adjusting rings when installing the rear bearings of the primary and secondary shafts in the rear cover of the gearbox: a - protrusion of the rear bearing of the input shaft; b - protrusion of the rear bearing of the secondary shaft; c - drowning of the bearing surface of the rear bearing of the secondary shaft; d - sinking of the bearing surface of the input shaft rear bearing; e is the thickness of the sealing gasket; v is the thickness of the adjusting ring of the input shaft rear bearing; s - thickness of the adjusting ring of the rear bearing of the secondary shaft
Measurement of the sinking of the bearing surface in the seat of the rear cover of the gearbox
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