Cylinder size measurement points
A - Longitudinal direction; B - Transverse direction; a - Upper travel point of the upper compression ring; b - Bottom dead center; c - Lower point of the oil scraper ring stroke; 1, 2, 3 - Measurement points
Machining of mating surfaces of the cylinder block and measuring points
The dimensions of the cylinders and pistons are given in Specifications. Please also pay attention to the following parameters:
| Permissible wear in longitudinal and transverse directions | 0.10 mm |
| Permissible ovality | New 0.007 mm |
| Acceptable 0.05 mm | |
| Permissible roughness RZ after honing | 0.003 - 0.006 mm |
| Permissible waviness Wt | 50% of roughness |
| Honing angle | 50±10 |
Dimensions for machining the mating surfaces of the cylinder block are given in Specifications.