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9.3.13. Adjustment of bearings of rotary knots

Design of rotary knot

1 — the Rotary lever
2 — the Top bolt of an axis of turn of a wheel
3, 6 — Remote rings

4 — Adjusting washers
5 — the Hinged casing

Centering of the rotary lever (1)

Measurement of size of a gap "And" in the top rotary knot

The scheme of rotary assembly for calculation of thickness of adjusting washers


 PERFORMANCE ORDER

  1. Remove a hinged casing assembled with a power shaft (see the Section Removal and installation of power shafts of the forward bridge).
  2. Fill in a bridge case sleeve the corresponding directing ring from a special remnabor, - the ring has to nestle without any side play on a holder of the bearing bearing.
  3. In case of need center a center punch the rotary lever (1).
  4. Establish the top bolt of an axis of turn of a wheel (2) with a 2-millimeter remote ring (3) and without adjusting washer (4).

The lower bolt is put by the last five millimeters in a tightness in assembly of a hinged casing (5) therefore before measurement of adjusting washers between it and an internal holder of the bearing it is necessary to establish a remote ring 6 mm thick. One more ring 4 mm thick has to be put between the rotary lever and a hinged casing.

  1. Put a bolt in the lever so completely to choose the side play of the bearing of rotary knot taking place.
  2. For shrinkage of the bearing rotate a hinged casing in different directions.
  3. By means of the probe of lezviyny type measure a gap "And" between a casing (5) and a bolt (2), then define a gap by a remote ring (6) "In" between a casing (5) and the rotary lever (1), - write down results of measurements.
  4. Make calculation of thickness of adjusting washers for the following scheme:

Top rotary knot
Gap "And" = 1.30 mm
Adjusting ring = 2.00 mm
Bearing pretightness = 0.15 mm
Settlement thickness of an adjusting washer = 2.00 – 1.30 + 0.15 = 0.85 (mm)

Lower rotary knot
Gap "In" = 1.10 mm
Difference of thickness of remote rings = 6 – 4 = 2.00 (mm) (see the remark above)
Bearing pretightness = 0.15 mm
Settlement thickness of an adjusting washer = 2.00 – 1.10 + 0.15 = 1.05 mm

  1. Remove the directing ring and establish into place assembly of a hinged casing in a power shaft (see the Section Removal and installation of power shafts of the forward bridge).
  2. Further installation is made as it should be, the return to an order of dismantle of components.