- clamp base 4 (pic. 2-33) fixtures in a vice and install a connecting rod and piston group on it;
- lower the bracket 8 of the indicator, insert the threaded rod 3 into the hole of the finger and slide it into the hole of the boss until the head of the rod 2 stops against the end of the finger;
- screw nut 5 onto the end of the rod and tighten it so that it, in contact with the support, selects possible gaps;
- raise the bracket 8 to a horizontal position, secure it with the handle 7 and install the pin 1 of the indicator 9 on the head 2 of the rod inserted into the finger;
- set the indicator to zero and insert stop 6 into the groove of the threaded rod so that the rod does not turn;
- with a torque wrench, apply a torque of 12.7 Nm to the nut 5 of the rod (1.3 kgf·m), corresponding to an axial load of 3.92 kN (400 kgf).
Pic. 2-33. Assembled piston-pin-connecting rod assembly mounted on fixture A.95615 for pin extrusion test: 1 - indicator pin in contact with the end of the rod: 2 - arrow head in contact with the finger; 3 - threaded rod with a groove; 4 - base; 5 - rod nut; 6 - thrust pin of the rod, 7 - bracket clamp handle; 8 - indicator bracket; 9 - indicator
The landing of the pin in the connecting rod will be correct if, after the termination of the torque wrench and the return of the nut to its original position, the indicator needle returns to zero.
If the pin slips in the top end of the connecting rod, replace the connecting rod with a new one.