1. Install the connecting rod cover on the connecting rod (without bearing), and tighten it according to the specified torque, and install the repaired piston pin.

2. Set the connecting rod bearing hole on the prismatic support of the tester, adjust the shaft end adjusting screw, make the centering block on the prismatic support seat, and fix the connecting rod on the tester.

3. The V-shaped surface of the three-point gauge of the tester is placed on the top surface of the piston pin to observe the contact between the three measuring points of the three-point gauge and the inspection plate.

4. If the three measuring points of the three-point gauge are in contact with the inspection plate, the connecting rod is neither bent nor twisted.

5. If the upper measuring point is in contact with the flat plate, the lower two measuring points are not in contact with the flat plate, and are equal to the flat plate gap, or the lower two measuring points are in contact with the flat plate, and the upper measuring point is not in contact with the flat plate, indicating that the connecting rod is bent. At this time, the gap value between the measuring point and the flat plate is measured by the feeler gauge, that is, the bending value of the connecting rod over the length of 100 mm.

6. If only one lower measuring point is in contact with the flat plate, and the gap between the upper measuring point and the flat plate is equal to 1/2 of the gap between the other lower measuring point and the flat plate, the gap between the lower measuring point and the flat plate is the length of the connecting rod at l00rnm. The twist value on.

7. If a lower measuring point is in contact with the flat plate, but the gap between the upper measuring point and the flat plate is not equal to l/2 of the gap between the other lower measuring point and the flat plate, it indicates that the connecting rod has both bending deformation and distortion, and the lower measuring point The gap with the plate is the twist value of the link over a length of 100 mm. The difference between the gap between the last measuring point and the flat plate and the gap between the lower measuring point and the flat plate is the bending value of the connecting rod over a length of 100 mm.

8. Align the end face of the connecting rod with the flat plate, and measure the distance a between the end face of the connecting rod and the flat plate; measure the distance b by flipping the connecting rod 180 degrees, if the values measured twice are not equal, It shows that the connecting rod has double bending, and the difference between the two measured values (a-b) is the double bending value.