Fig. 2.90. Check of diameter of a pusher by means of a micrometer

Measure by a micrometer diameter of a pusher (fig. 2.90).

Diameter of a pusher – 30,966–30,976 mm.

Make calculation by subtraction of value of diameter of a pusher from value of diameter of boring under a pusher in the case of a head and define a gap.

Standard gap – 0,033–0,059 mm.

Limit gap – 0,079 mm.

If the gap exceeds the most admissible, replace a pusher. If necessary replace a head of the block of cylinders.

Fig. 2.91. Measurement of diameter of a rstochka of a pusher by means of a nutrometr

Check pushers and boring under pushers in the case of a head of the block of cylinders. By means of a nutromer measure diameters of boring under pushers in a head of the block of cylinders (fig. 2.91).

Diameter of boring – 31,000–31,025 mm.

Buckling limit – 0,7 mm.

Check a buckling of a contact surface of a final collector. If the size of a buckling exceeds the most admissible, replace a collector.