| 1. Before check of pistons with rods remove from pistons piston rings and carefully clear pistons. |
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2. For removal of piston rings from pistons unclench a ring and insert under a ring, in regular intervals on the circles two or three old edges щупа and on them shift a ring from the piston. Be cautious, do not scratch the piston the ring ends. Rings very fragile also can burst, if them to unclench very strongly. Working edges of rings are very sharp, therefore address with them cautiously not to be cut. |
| 3. Hold each set of rings together with the piston for their repeated installation on the places. |
| 4. Clear all traces of a deposit from the top part of the piston. |
| 5. Remove a deposit from flutes under piston rings in the piston, using an old ring. |
| 6. After touch removal clear the piston with a rod corresponding solvent and wipe them dry. |
| 7. At engine assemblage it is desirable to use new piston rings. |
| 8. Carefully examine each piston on presence of cracks round a skirt and apertures under a piston finger. |
| 9. Check up deterioration on a piston skirt, an aperture in a piston head, and also прожог in the top part of the piston. |
| 10. Traces of dot corrosion on the piston specify that the cooling liquid has got to the combustion chamber. It is necessary to find the reason of hit of a liquid in the chamber of combustion and to eliminate it. |
| 11. On engines with the aluminium block of cylinders with damp sleeves it is impossible to replace pistons separately; pistons are delivered complete with rings and sleeves. |
| 12. Check up each rod on deterioration and presence of cracks, and also form distortion. |
| 13. It is recommended to make replacement of hairpins and nuts of fastening of the bottom head of a rod at each dismantling. |
| 14. On all petrol engines piston fingers запрессованы in the top head of a rod, therefore replacement of rods are necessary for making in a specialised workshop. |
| 15. On diesel engines piston fingers are established on sliding landing and fixed in the piston by two lock rings. On these engines pistons and rods can be divided as follows. |
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| 16. Using an edge of a thin screw-driver remove from the piston a lock ring and a hand squeeze out a piston finger. At repeated installation of a piston finger use only new lock rings. |
| 17. Check up a piston finger and the bearing of the top head of a rod on deterioration. |
| 18. Rods usually do not demand replacement if before it there was no engine jamming. |
| 19. Establish the piston on the top head of a rod so that the arrow on the piston bottom settled down from outside marks of the bottom head of a rod. Grease a piston finger and insert it into the piston and the top head of a rod. Check up, that the piston easily and freely turned on a piston finger then fix a piston finger new lock rings. Check up, that each lock ring has been correctly located in a piston flute (the Correct arrangement of the piston concerning a rod fig. see diesel engines). |