Analysis of Vibration Issues in Dump Trucks During Braking

The vehicle operates smoothly under normal driving conditions, but significant steering wheel vibration occurs when the brake pedal is pressed?

During braking, an imbalance in force distribution around the brake drum leads to vertical motion, causing the front axle to shake.

Common Issues:

1. Irregular surface on the brake shoe or insufficient chamfer angle.

2. Brake drum deformation (out-of-round condition).

3. Warped steel rim or uneven brake drum surface.

4. Misalignment between the brake drum and steel ring contact surfaces.

Troubleshooting Steps:

1. Inspect the brake shoe: Ensure the surface is even and the chamfer is adequate. If the chamfer is too small, refine it through polishing.

2. Examine the brake drum: Check for out-of-roundness. If detected, rectify it using a boring procedure.

3. Evaluate the steel rim and brake drum: Replace the steel rim if it is warped. If the brake drum surface is uneven, perform a boring operation.

4. Assess the contact surfaces: If the brake drum and steel ring do not align properly, use a boring process to correct the issue.

Key Considerations:

1. Identify the fault conditions: The problem only arises during braking, with no issues during normal operation.

2. Inspect components individually: Examine the brake drum and steel ring separately to determine if rotating parts are unbalanced or deformed.

3. Follow a systematic approach: Conduct inspections from general to specific, starting with simpler checks to minimize effort and time.