Maintenance methods and steps of piston ring

When installing the piston rings, ensure that appropriate end play, backlash and backlash are reserved to prevent the piston rings from becoming stuck or damaged in the ring groove. According to the repair grade of the cylinder, select the matching piston ring

1. Troubleshooting of piston ring

When the piston ring is broken or damaged, in addition to the wear of the regular, a detailed inspection is required. If the maximum wear of the cylinder reaches 0.18 to 0.22mm per 100mm diameter, or during the engine overhaul, the piston ring should be replaced to improve the performance of the engine.

2. Selection and verification of piston ring materials

When installing the piston rings, ensure that appropriate end play, backlash and backlash are reserved to prevent the piston rings from becoming stuck or damaged in the ring groove. According to the repair level of the cylinder, select the matching piston ring, and in the case of minor repair or replacement, the repair size of the new piston ring must be the same as the original ring. You cannot use a file to modify the piston ring size.

3. Suitability detection of piston ring

In order to ensure the perfect fit between the piston ring, the ring groove and the cylinder, the following inspections are required when selecting the piston ring: The first is the elasticity of the piston ring, which is the key to ensuring the sealing of the cylinder. It is usually checked with an elasticity detector. Secondly, check the leakage luminosity of the piston ring, put it in the cylinder, observe whether there is light leakage through a specific method, and measure whether the light leakage meets the standard. In addition, it is necessary to check the piston ring end clearance and ring clearance to ensure that they are within the specified range, such as the specific requirements of 6BTA 5.9 and AJR engines.

4. Installation inspection of piston ring

After placing the piston ring in the ring groove, the piston should be rotated to ensure that the ring can rotate freely in the groove without blocking. Subsequently, use a straight edge to measure the edge clearance to ensure that the maximum backlash requirements for the engine model are met. If the gap is too large or too small, you need to re-select the appropriate piston ring. Finally, confirm that the width of the piston ring should be slightly less than the width of the ring groove group to ensure the stability of the installation.