18.104.22.168. Assembly of conrod and piston group
Installation of a piston finger of the engine of fashion. 2106 on adaptation, for its press fitting in the piston and a head of a rod
||1 – adaptation roller;
2 – piston finger;
3 – guide;
4 – persistent screw
Press fitting of a piston finger in the top head of a rod of the engine of fashion. 2106
||1 – adaptation;
2 – piston finger.
The piston has to lean on a rod head in the direction specified by an arrow.
As the finger is implanted into the top head of a rod with a tightness, the rod needs to be heated to 240 °C for expansion of its head.
To place rods in the furnace which is already heated to 240 °C for 15 min. the top heads sent to inside furnaces.
For the correct connection of a finger with a rod it is necessary to press a finger as soon as possible as the rod is cooled quickly and after cooling of a rod it will be impossible to change position of a finger.
The finger should be prepared for assembly in advance, having put on it the roller 1 (fig. Installation of a piston finger of the engine of fashion. 2106 on adaptation, for its press fitting in the piston and a head of a rod) devices, having established on the end of this roller a guide 3 and having fixed it by the screw 4. The screw should be tightened leaky that there was no its jamming at expansion of a finger from contact with a heated rod.
Quickly to clamp the rod taken from the furnace in a vice. To put on the piston a rod, watching that the opening under a finger coincided with an opening of the top head of a rod. Adaptation 1 (fig. A press fitting of a piston finger in the top head of a rod of the engine of fashion. 2106) to push the fixed piston finger in an opening of the piston and the top head of a rod so that the zaplechik of adaptation adjoined to the piston.
During this operation the piston has to nestle a lug on the top head of a rod in the direction of a finger press fitting (it is shown by an arrow on (fig. A press fitting of a piston finger in the top head of a rod of the engine of fashion. 2106), what will allow a finger to reach the correct position.
The piston has to connect to a rod so that the tag "П" on the piston was from an opening exit for oil on the lower head of a rod.
After cooling of a rod to oil a finger engine through openings in piston lugs.
At installation of piston rings their locks to have through 120 °.
The rod is processed together with its cover and therefore covers of rods are not interchanged. That not to mix them at assembly, on a rod and the cover corresponding to it number of the cylinder in which they are established is branded. At assembly of figure on a rod and a cover have to be on the one hand.