3.2.7.6. Elimination of gaps of primary, secondary shaft and shaft of differential of a case of the main transfer

Fig. 3.59. Elimination of gaps before installation of bearings

For installation of bearings establish special adaptations (cores) in openings And and In selectors and turn selectors so that to increase a gap. After that turn the special adaptation in the opposite direction before elimination of gaps (fig. 3.59).

Fig. 3.60. Expansion of selectors manually

Manually expand selectors against the stop (fig. 3.60).

Fig. 3.61. Gap measurement in the selector

Use щуп to measure a gap in the special adaptation (selector) (fig. 3.61).

ATTENTION Measure a gap on all circle of the selector. Remember the maximum value and choose laying as follows.

choose the thinnest admissible laying from the table to receive a standard gap.

Standard gap: 0–0,05 mm.

value of measurement щупа – 0,57 mm;

range of thickness of laying: (0,57 mm – 0,05 mm) – (0,57 mm – 0 mm) = 0,52 mm – 0,57 mm;

laying: 0,55 mm.

choose the thinnest admissible adjusting laying of a secondary shaft from the table to receive a standard gap.

Tightness size: 0,03–0,08 mm.

value of measurement щупа: 0,57 mm;

range of thickness of laying: (0,57 mm + 0,03 mm) – (0,57 mm + + 0,08 mm) = 0,60 mm – 0,65 mm;

laying: 0,60 mm.

Fig. 3.62. Installation of a dinamometrichesky key

Establish the special adaptation and a dynamometer or a dinamometrichesky key (fig. 3.62).

Fig. 3.63. Adjustment of a gap of the selector

Adjust a gap of the special adaptation (selector) to receive a certain value preliminary a loading/dynamometer (fig. 3.63).

NOTE Consider value of preliminary loading when the differential starts to turn. Measure several times and calculate average value.

Preliminary loading: 0,5 N · m.

Value on a dynamometer: 5 N.

Fig. 3.64. Gap measurement in the selector for differential

Use щуп for gap measurement in the selector for differential (fig. 3.64).

Add 0,15 mm to the measured gap and choose a combination of laying which gives value the closest to the measured.

Example: 0,32 mm + 0,15 mm = 0,47 mm.

The next laying (on the thick party): 0,47 mm – 0,50 mm

Remove a case of the main transfer and the special adaptation.

Remove selectors, primary shaft and differential.

Remove holders of bearings.

Fig. 3.65. Installation of a holder of the bearing of primary shaft

Establish adjusting laying (ки) and a holder of the bearing of primary shaft, using a suitable pipe (fig. 3.65).

ATTENTION Use adjusting laying (ки), chosen at adjustment of a preliminary tightness in the bearing.

Fig. 3.66. Installation of a holder of the bearing of a shaft of differential

Establish adjusting laying (ки) and a holder of the bearing of a shaft of differential, using a suitable pipe (fig. 3.66).

ATTENTION Use adjusting laying (ки), chosen at adjustment of a preliminary tightness in the bearing.