Using the formula С=А-В, calculate the thickness of the thrust washer between the reverse gear and the drive gear of the speedometer drive, which determines the axial clearance of the secondary shaft, where:
- C is the thickness of the thrust washer;
- A - the base length of the block of gears of the secondary shaft, equal to 138 mm;
- B - the distance between the shoulder of the hub of the synchronizer coupling of III and IV gears and the ground surface of the reverse gear.
Measure and record the thickness of the speedometer drive gear.
Press the speedometer drive gear onto the secondary shaft using a mandrel with an inner diameter of 38 mm and an outer diameter of 45 mm until it stops with a force of no more than 2 tf.
Using the formula X=A+D, determine the total length of the assembled output shaft, where:
- X is the total length of the assembled secondary shaft;
- D is the thickness of the speedometer drive gear.
Press the output shaft rear bearing into the rear crankcase cover and measure the depth of the rear crankcase cover with the new gasket installed (see photo).
According to the formula Y=F- (X-E) determine the thickness of the adjusting ring installed on the output shaft in order to adjust the position of the gear cluster relative to the rear bearing and the rear cover of the gearbox housing, where:
- Y is the thickness of the adjusting ring installed under the rear bearing of the secondary shaft;
- F - basic depth of the rear cover of the gearbox housing, equal to 116 mm;
- E is the measured depth of the rear cover of the gearbox housing with the input shaft rear bearing pressed in and a new gasket.