MR1 Pressure Related Problem in WDG4/WDP4

WDG4/WDP4 Locos

MR1 Pressure is available and MR safety valve blowing

Probable Reasons:

  1. If computer breaker is tripped.
  2. Compressor is defective during loading.
  3. MR1 J Filter COC is closed (sanders, wipers, horns, Auto drain and Radar blow down is also not achievable.

Action to be taken by LP:

  1. Reset the same.
  2. Inform shed and work onwards.
  3. Keep MR1 J Filter COC in open.

MR1 Pressure is low with PCS open indication

Probable Reasons:

  1. Compressor is defective in unloading. (MVCC - Trouble).
  2. MR1 - Auto blow down valve blowing continuously.
  3. Feed pipe leakage.
  4. MR Equalizer leakage.
  5. Leakage in Air Drier.
  6. Sander or horn valves blowing continuously.

Action to be taken by LP:

  1. Close MR1 J Filter COC and drain MR1 J- Filter and open the MR1 J Filter COC, when MR safety valve starts bowing..
  2. Close to shut off position (manual position –spindle inside).
  3. Close additional FP COC.
  4. Close both end MR Equalizer COC.
  5. Put off Air drier breaker and disconnect electrical coupler.
  6. If not rectified shut down the engine, drain out MR1 completely and dummy the purge valve.
  7. Close MR1 J Filter COC and drain MR1 J Filter and open the MR1 J Filter COC, when MR safety valve starts bowing.

MR1 LOW indication in display and safety valve is blowing

Probable Reasons:

  1. MRPT COC is closed.
  2. Moisture in MR1 Pressure sensing system.

Action to be taken by LP:

  1. Keep MRPT COC in open.
  2. Close MRPT COC and drain moisture by Pressing the pressure relief valve (quick connector stem).

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