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2-2-16-proverka-sostoyaniya-bloka-cilindrov.html
2.2.16. Check of a condition of the block of cylinders
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- Before condition check the block should be cleared (look the Section Cleaning of the block of cylinders).
- Visually check existence of cracks, a rust and corrosion. Look in carving openings for the broken carvings. Expediently in the mechanical workshop having the special equipment to check the block on existence of the hidden cracks. At detection of defects the block if it is possible, it is necessary to repair; if is not present, it is necessary to get the new block.
- Check surfaces of cylinders on an istiraniye and existence of furrows.
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- Measure diameter in the top part of each cylinder (at once under a ledge zone - And), in average - In and bottom - With parts parallel to an axis of a cranked shaft.
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- For determination of diameter of the cylinder length of a measuring instrument check a micrometer
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- Further, measure diameter of the cylinder at the same levels in the direction, perpendicular axes of a cranked shaft. Compare results to requirements of the Size table and adjusting data at the end of the Management.
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- If precision measuring tools are inaccessible, sizes of gaps between pistons and cylinders, though is not so exact, it is possible to define with the help щупов.
- For definition of gaps choose щуп and insert it into the cylinder along the interfaced piston. The piston should be established precisely in normal situation. Shchup should be established between the piston and the cylinder on one of persistent surfaces (on 90 ° in relation to an opening under a finger). The piston should pass on the cylinder) щуп is established) with small effort.
- If the piston easily passes down, the gap is great and the new piston is required. If the piston gets stuck in the lower part of the cylinder and moves more freely in the top part, the cylinder has a konusnost. If at piston rotation together with shchupy in the cylinder there are resistance sites, the cylinder has ovality.
- Repeat operation for other pistons and cylinders.
- If walls of cylinders are used strongly up or have furrows or if they have a konusnost or ovality is higher than limits in the Size table and adjusting data at the end of the Management, the block of cylinders is necessary for grinding and отхонинговать in a mechanical workshop. After polishing pistons and rings of the increased size be required.
- If cylinders are in rather good condition and have no the wear which is falling outside the limits admissions and if gaps between cylinders and pistons are maintained in norm, they should not be ground. Everything that is required, this honingovaniye and a new set of rings (look Honingovaniye's Section of cylinders).
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