DMF breakdown causes (based on symptom)

Noise at all

Problem: Visual damage blue color both sides. Root Cause: Very high thermal.

Noise at all

Problem: Burnt residues of abraded lining inside ventilation holes. Root Cause: Slippage and high thermal load.

Noise at all

Problem: Trace of liquid or solid grease from primary flywheel welding. Root Cause: Defective primary flywheel.

Noise at starting

problem: Secondary flywheel scores the primary flywheel. Root Cause: DMF bearing/bushing is worn out.

Noise at starting

Problem: DMF starter ring gears heavily worn or broken. Root Cause: Defective starter.

Fails

Problem: Grease egress, sealing cap missing or discolored brown due to overload. Root Cause: Thermal overload or mechanical damage/overload.

Fails

Problem: Excessive trace of grease on the back of the primary flywheel. Root Cause: Thermal overload or mechanical damage/overload.

Fails

Problem: DMF bearing is damaged. Root Cause: Wear and/or mechanical impact.

Fails

Problem: Strong noise and no torque transmission. Secondary flywheel is blocked or free to rotate at 360. Root Cause: Mechanical damage.

Vibration

Problem: Balance weight missing (possible to see welding spots). Root Cause: Mechanical impact on balance weight.

Vibration

Problem: Secondary flywheel free to rotate beyond permissible free movement. Root Cause: Springs’ loss of effectiveness.