Using a set of feeler gauges, check the gaps between the gear teeth, as well as between the outer diameters of the gears and the walls of the pump body (Fig. 2-70), which should be 0.15 mm, respectively (maximum permissible 0.25 mm) and 0.11-0.18 mm (maximum permissible 0.25 mm) If the gaps exceed the maximum values, replace the gears and, if necessary, the pump housing.
Using a feeler gauge and a ruler (Fig. 2-71), check the gap between the ends of the gears and the plane of the housing, which should be equal to 0.066-0.161 mm (maximum permissible 0.2 mm). If the gap is more than 0.2 mm, replace the gears or the pump housing, depending on what is worn. After measuring the parts, determine the gap between the driven gear and its axis, which should be 0.017-0.057 (maximum permissible 0.1 we), and also between the pump shaft and the hole in the housing, this gap should be 0 016-0.055 (maximum permissible 0.1 mm). If the gaps exceed the limits, replace the worn parts.
