Ремонт коромысел Днепр

Introduction

This tutorial focuses on repairing rocker arms for Dnepr motorcycles, drawing from the guidance provided in the video by Sergey Moto-47. Proper maintenance of rocker arms is crucial for optimal engine performance, and this step-by-step guide will help you understand the tools and procedures necessary for a successful repair.

Step 1: Gather Necessary Tools and Materials

Before you begin the repair, ensure you have the following items:

• Piston pin from a "Muravy" or "Planeta" motorcycle with a diameter of 14.99 mm (nominal) or repair sizes of 15.1 mm and 15.2 mm.
• Adjustable reamer with a range of 15 mm to 15.2 mm.
• Standard tools for disassembly, such as wrenches, screwdrivers, and pliers.
• Cleaning materials like cloths and solvents.

Practical Tips

• Inspect the condition of your rocker arms before beginning the repair.
• Having a clean workspace will help you keep track of small parts.

Step 2: Disassemble the Rocker Arm Assembly

Carefully disassemble the rocker arm assembly from your motorcycle. Follow these sub-steps:

1. Remove the rocker arm covers using the appropriate wrench.
2. Take out the rocker arms by unscrewing the bolts that hold them in place.
3. Keep all parts organized to ensure easy reassembly.

Common Pitfalls

• Avoid losing small components like washers and bolts. Use a tray to keep them sorted.

Step 3: Inspect and Measure the Rocker Arms

Once disassembled, inspect the rocker arms for wear and damage:

• Use a caliper to measure the diameter of the pivot point.
• Check for uneven wear or cracks in the material.

Practical Advice

• If the wear is significant, consider whether replacement is more cost-effective than repair.

Step 4: Ream the Rocker Arms

If the pivot holes are worn out, you will need to ream them:

1. Select the appropriate reamer size (15 mm to 15.2 mm).
2. Insert the reamer into the pivot hole and rotate slowly to ensure even reaming.
3. Check the fit with the piston pin periodically to avoid over-reaming.

Important Note

• Be cautious not to damage the rocker arm while reaming. Take your time to ensure precision.

Step 5: Install the Piston Pin

Once the reaming is complete, proceed to install the piston pin:

1. Align the piston pin with the reamed hole.
2. Insert the piston pin until it is snug but not overly tight.
3. Secure the rocker arm with its retaining bolts.

Final Checks

• Ensure that the rocker arms move freely after installation.

Conclusion

Repairing rocker arms for Dnepr motorcycles involves careful disassembly, measurement, reaming, and reassembly. Always prioritize precision and cleanliness during the process. If you're unsure about any step or if the wear is extensive, consulting a professional mechanic may be beneficial. Following these steps will help maintain your motorcycle's performance and extend its lifespan.