The aluminum cover in the plane of contact of the gears should not have ledges. The surface should be flat. In case of noticeable wear, the cover is clamped at points 2 (figure 61) and mill the surfaces X and Y to a size of (13.5±0.3) mm. The maximum metal removal should not exceed 0.2 mm. Replace crankshaft seal 1 with a new one. When pressing in the seal, apply force as close as possible to the outer diameter of the seal.
The working surfaces of the housing must not have scratches. The maximum outer diameter under the driven gear must not exceed a diameter of 75.10 mm (figure 62). The maximum minimum width of the segment must be at least 3.40 mm. In case of significant wear, the housing is replaced with a new one.
The maximum axial clearances are measured with an indicator; they should not exceed 0.12 mm for the driving gear and 0.15 mm for the driven gear.
The maximum minimum dimensions of the gears are shown in Figure 63. If the clearances and dimensions exceed the maximum values, the gears are replaced with new ones.
They also check whether the elasticity of the pressure reducing valve spring has decreased by comparing the obtained data with the required data:
- Length of spring in free state, mm — 44.72
- Length of spring under load (39.24±2.35) N, mm — 31.70
The maximum diameters must be: pressure reducing valve - not less than 11.98 mm; valve holes - no more than 12.03 mm.