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2.2.16. Check of a condition of the block of cylinders

 PERFORMANCE ORDER

  1. Before check of a state the block should be cleared (watch the Section Cleaning of the Block of Cylinders).
  2. Visually check existence of cracks, rust and corrosion. Look for the broken carvings in carving openings. Expediently in the mechanical workshop having the special equipment to check the block for existence of the hidden cracks. At detection of defects the block if it is possible, it is necessary to repair; if is not present, then it is necessary to buy the new block.
  3. Check the surfaces of cylinders for attrition and existence of furrows.
  1. Measure diameter in the top part of each cylinder (at once under a ledge zone - And), in average - In and lower - With parts parallel to an axis of a bent shaft.
  1. For determination of diameter of the cylinder check length of the measuring instrument a micrometer
  1. Further, measure diameter of the cylinder at the same levels in the direction, perpendicular axes of a bent shaft. Compare results to requirements of the Size table and adjusting data at the end of the Management.
  1. If precision measuring tools are inaccessible, then sizes of gaps between pistons and cylinders, though not so precisely, it is possible to determine by probes.
  2. For definition of gaps choose the probe and insert it into the cylinder along the interfaced piston. The piston has to be installed precisely in normal situation. The probe has to be installed between the piston and the cylinder on one of persistent surfaces (on 90 ° in relation to an opening under a finger). The piston has to pass on the cylinder) the probe is installed) with small effort.
  3. If the piston easily passes down, then the gap is big and the new piston will be required. If the piston gets stuck in the lower part of the cylinder and moves more freely in the top part, then the cylinder has conicity. If at rotation of the piston together with the probe in the cylinder there are sites of resistance, then the cylinder has ovality.
  4. Repeat operation for other pistons and cylinders.
  5. If walls of cylinders are used strongly up or have furrows or if they have conicity or ovality above limits in the Size table and adjusting data at the end of the Management, then the block of cylinders needs to be ground and otkhoningovat in a mechanical workshop. After grinding pistons and rings of the increased size will be required.
  6. If cylinders are in rather good shape and have no the wear which is going beyond admissions and if gaps between cylinders and pistons are maintained normal, then they should not be ground. Everything that is required, this honingovaniye and a new set of rings (watch Honingovaniye's Section of cylinders).