Air Brake System Problems in WDG4/WDP4


Air Brake System Problems

Indications:

  1. Crew message- Communication link failure MAB.
  2. Air brake fault-use loco in LEAD only.
  3. Air brake fault-use loco in TRAIL only.
  4. Air brake fault-BC control failure.
  5. Air brake fault-BC equalizing control failure.
  6. No blended brake - Lock out.
  7. Loco brakes not releasing.

Remedial action for Communication link failure MAB:

  1. Recycle micro air brake & Computer control breakers.

  2. Check for tightness of COM card of EM2000.

  3. Check for tightness of CPZ card in CCB system.

  4. Check for tightness of VCU connectors and CRJ Connector.
Check for other Probable Reasons

Remedial action for Air Brake failure-use loco in LEAD:

  • Inform Shed and work further.
Check for other Probable Reasons

Remedial action for Air brake failure-use loco in TRAIL:

  1. Check for availability of MR pressure.
  2. If available, recycle Micro Air Brake and computer control breakers.
  3. Conduct Air Brake Self-Test.
  4. If MR pressure is not available,Consult Shed.
Check for other Probable Reasons

Remedial action for Air brake failure-BC control failure :


  1. Fault Code in CCB 1.5 starting with '8'.
  2. Check for tightness of EPA2 front connector.
  3. Conduct Air Brake Self Test.
Check for other Probable Reasons

Remedial action for Air brake fault-BC equalizing control failure:


  1. Fault Code in CCB 1.5 starting with '7'.
  2. Check for tightness of EPA3 front connector.
  3. Conduct Air Brake Self Test.
  4. Check for tightness of BC equalizing valve connector.
Check for other Probable Reasons

Remedial action for No blended brake - Lockout :

  1. Conduct blended brake self test.
  2. Even if it does not pass work further and inform Shed.
Check for other Probable Reasons

Remedial action for Loco Brakes not releasing :

  • Conduct self-test.

Check for other Probable Reasons

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