2.8.1. Gap check in a rod the bearing

Establish a cover of the shatunny bearing (3) with loose leaves of the shatunny bearing (2) on a rod.

NOTE Do not change a cover of the shatunny bearing and a rod during installation, and provide purity of contacting surfaces

NOTE Old bolts can be reused for check.

Tighten 2 bolts the moment of 13 N · m, then tighten on +60 ° +15 °.

Diameter of a rod of the center is measured with an internal micrometer in positions I, II, and arithmetically. Formula and example of calculation of diameter of the shatunny bearing: I + II + III.

I–43, 026 mm.

II – 43, 027 mm.

III – 43, 031 mm.

129,084 mm: 3= 43,028 mm.

Average internal diameter of the shatunny bearing – 43,028 mm.

Diameter of a neck of a shaft of the shatunny bearing is measured by an external micrometer in positions I, and II. A formula and an example for calculation of diameter of a neck of a shaft of the shatunny bearing:

I + II/2;

I–42,977 mm + II – 42,985 mm.

85,962 mm: 2= 42,981 mm.

Average diameter of a neck of a shaft of the shatunny bearing – 42,981 mm.

Define a gap in a rod the bearing, using average internal diameter of the shatunny bearing and average diameter of a neck of a shaft of the shatunny bearing.

Average internal diameter of the shatunny bearing: 4,028 mm.

Average diameter of a neck of a shaft of the shatunny bearing: 2,981 mm.

Gap in a rod the bearing: 0,047 mm

The settlement gap in a rod the bearing is equal 0,047 mm in this example. The admissible gap of the shatunny bearing is equal from 0,013 mm to 0,061 mm.