AC loco modification

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WDG4/WDP4 Locos Dead Loco Movement

WDG4/WDP4 Locos Dead Loco Movement Shut down the Engine as per procedure and attach with the working loco. If equalizer pipes are connected work the loco without any change. If BP pipe only connected the following procedure to be carried out. Drain MR1 and MR2 completely, then close the drain cocks. At any one end open BC Equaliser and M R Equaliser COC. Connect BP Pipe and open BP Angle cocks. Open Dead Engine cock (in CCB 1.5) or Turn Dead Engine knob in 'Dead In' position (in CCB 2.0) located in the nose compartment. Ensure M R pressure is builds to 1.8 kg/cm2 in the dead loco. Destruct the BP and ascertained loco brake is getting applied in the dead loco and BC Pressure is building up to 1.8 kg/cm2.. Create BP Pressure to 5.2 kg/ cm2. and ascertained loco brake is getting released. Ensure air is leaking through the dead loco BC Equaliser pipe during application and releasing of brakes. If not the BC Equaliser COC Position is to be ascertained for proper pos...
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WDG4/WDP4 Locos Cranking Procedure

WDG4/WDP4 Locos Cranking Procedure Ensure that start Fuse is in position and close the battery knife switch (ON). In the circuit breaker panel, put ON all  Black  labelled circuit breakers.  Yellow  labelled circuit breakers (Turbo & Computer) at ON.  White labelled circuit breakers as applicable. On computer to select starting system. Select  Main Menu > Data Meter > Starting system. TL PR shows on (Turbo Cooling Cycle Starts) Now engine is ready for cranking. Go to the FUEL PRIME / ENGINE START switch (Loco motives provided with Governor booster pump FUEL PRIME / ENGINE START switch is provided on Engine Control panel (drivers cab) otherwise FUEL PRIME / ENGINE START switch is provided at loco right side Engine accessories room below fuel oil primary filter condition gauge) the and turn the switch to FUEL PRIME side (left side).. If the shut down procedure was followed properly earlier, the fuel pump motor will start (the motor sound...
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WDG4D/WDP4D Locos Dual Cab Changing Procedure

WDG4D/WDP4D Locos Dual Cab Changing Procedure Preparation: Stop and secure the Loco. Apply Direct brake to Full (Br.Cyl.Pr.- 5.2 kg/cm2). Bring the Reverser Handle to Centre. Keep Isolation switch in Run Position. Preparation for Working Cab to be made as Non Working: Move Auto Brake to FS. Wait till BP Exhaust sound stops. Move LT Switch from Lead to Trail (Ensure ER Pressure drops to zero). Release Direct Brake (without operating Bail OFF ring). Switch off ERS, GF, Control/FP Slider Switches and Dyn. control CB. Switch off GF CB in the Breaker panel. Switch off BL Key and remove the BL Key (in M edha Locos, Non Removable in Siemens Locos). Remove the Reverser Handle. Preparation for Non-Working cab to be made as Working: Move LT Switch from Trail to Lead (ER Pr. builds to 3.7 kg/cm2). Move Direct Brake Handle to Full (BC Pr. builds to 5.2 kg/cm2). Move Auto Brake from FS to Run (ER and BP Pr. builds to 5.2 kg/cm2). In Medha Locos, insert BL Key and turn...
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WDG4/WDP4 Locos Air Brake Self Test

WDG4/WDP4 Locos Air Brake Self Test Occasions to conduct: This test is to be conducted when Air Brake Failure Message displayed in the LCC or EM2000 display. When it is not possible to recover the penalty brake by placing the Auto brake handle to Full Service for 10 seconds or 60 seconds in Emergency. BC Pressure is not dropping to zero when direct brake handle is released. Before conducting Air Brake Self Test: Stop the train/loco and secure as per the instructions. Recycle the MAB and recover the penalty as per LCC Display. If unable to recover the penalty then only Air brake self-test to be done. Ensure the following to before conducting Air Brake Self Test: MR Pressure should be above 8.0 kg/cm2 and no external leakage. Front truck Brake cylinder COC is in open position. Loco is fully secured to prevent rolling of the loco during the test. (Apply hand brake and place wooden wedges). Loco is isolated from the formation.(Close all BCEQ, MREQ COCs, BP, FP COC)...
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WDG4/WDP4 Locos Shut Down Procedure

WDG4/WDP4 Locos Shut Down Procedure Select Starting system of computer to watch the status of TL PR. (Shows off). Press EFCO (Red) button on the Control panel till the engine stops. (TLPR shows ON). Make sure that the Turbo lube pump motor is running. Switch off all circuit breaker on the circuit breaker panel except turbo lube pump circuit breaker and computer circuit breaker.. Open battery knife switch. Remove the Reverser make entry of shutdown time and date in the log book. Wait till TLPR goes OFF. (Turbo Cooling cycle competes). Put off Turbo lube pump circuit breaker and computer circuit breaker.
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Trouble Shooting When Safety Device Tripping In WDG4/WDP4

WDG4/WDP4 Locos OSTA Tripping Indications: During cranking engine will not fire. During running engine will shut down. Message in Display: No start - Mechanical OSTA Tripped, Reset before Start. Action to be Taken by LP: Reset OSTA and crank the loco. Message will go off automatically after engine gets hold. Message in Display in SIEMENS Loco No Aux. gen. output/check all breakers. Action to be Taken by LP: Press EFCO button or recycle computer breaker ad crank the loco. LLOB Tripping Indications: During cranking engine will not CRANK. During running engine will shut down. Message in Display: Engine protection shut down – Low Oil Pressure. Action to be Taken by LP: Ascertain the reason, reset LLOB. Ensure Low Water Button is in normal position then. Re-crank the loco. Low Water Button in EPD Tripping Indications: During cranking engine gets hold and shut down automatically within 180 seconds. During running engine will shut dow...
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MR1 Pressure Related Problem in WDG4/WDP4

WDG4/WDP4 Locos MR1 Pressure is available and MR safety valve blowing Probable Reasons: If computer breaker is tripped. Compressor is defective during loading. 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: Reset the same. Inform shed and work onwards. Keep MR1 J Filter COC in open. MR1 Pressure is low with PCS open indication Probable Reasons: Compressor is defective in unloading. (MVCC - Trouble). MR1 - Auto blow down valve blowing continuously. Feed pipe leakage. MR Equalizer leakage. Leakage in Air Drier. Sander or horn valves blowing continuously. Action to be taken by LP: Close MR1 J Filter COC and drain MR1 J- Filter and open the MR1 J Filter COC, when MR safety valve starts bowing.. Close to shut off position (manual position –spindle inside). Close additional FP COC. Close both end MR Equalizer COC. Put off Air drier breaker and disconnect electrical c...
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WDP4/WDG4 Locos Checks to be done before cranking:

WDP4/WDG4 Locos Checks to be done before cranking: Put on the hand brake. Check oil and coolant water levels. Make sure that LLOB on Governor, Low water and crank case pressure reset buttons are pressed in. Make sure that Engine Over Speed Trip Reset Lever (OSTA) is in Reset Position (Handle should be tilted towards left side of locomotive in Reset position i.e. towards Fuel Spin On filter). Make sure that the isolate / Run switch is in 'isolate' position. On the Long hood control stand - Ensure: Engine Run switch is down (OFF). Control & FP breaker is up (ON). Generator filed switch is down (OFF). MU shut down RUN button is pressed - In. On working control stand: Ensure Reverser handle in Neutral. Throttle handle in idle. Keep Auto brake (A9) handle in RUN position.. Keep Direct brake (SA9) handle in Full application position. Keep Lead / Trail switch in Lead position. On Non – Working control stand: Ensure Reverser handle is removed. Throt...
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WDG4/WDP4 Locos Recycling procedure

WDG4/WDP4 Locos Recycling procedure in GTO LOCOS Keep Throttle Handle in Idle. Keep the Reverser handle in Neutral. Loco Brakes Applied condition. Keep the isolation switch in isolate position. Switch OFF the Computer Control Breaker. Switch OFF Circuit Breaker TCC1 Computer. Switch OFF Circuit Breaker TCC2 Computer. Switch OFF Circuit Breaker AC GTO 1 PWR Supply. Switch OFF Circuit Breaker AC GTO 2 PWR Supply. Wait for 20-30 seconds. Switch ON Circuit Breaker AC GTO 2 PWR Supply. Switch ON Circuit Breaker AC GTO 1 PWR Supply. Switch ON Circuit Breaker TCC2 Computer. Switch ON Circuit Breaker TCC1 Computer. Switch ON the Computer Control Breaker. Recover the BP by keeping the A9 in FS for 10 sec. Recycling procedure in IGBT LOCO'S Keep Throttle Handle in Idle. Keep the Reverser handle in Neutral. Keep the isolation switch in isolate position. Switch OFF the Computer Control Breaker. Switch OFF TRACTION CONTROL Circuit Breaker. Switch OFF Circuit Br...
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Air Brake System Problems in WDG4/WDP4

Air Brake System Problems Indications: Crew message- Communication link failure MAB. Air brake fault-use loco in LEAD only. Air brake fault-use loco in TRAIL only. Air brake fault-BC control failure. Air brake fault-BC equalizing control failure. No blended brake - Lock out. Loco brakes not releasing. Remedial action for Communication link failure MAB: Recycle micro air brake & Computer control breakers. Check for tightness of COM card of EM2000. Check for tightness of CPZ card in CCB system. 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: Check for availability of MR pressure. If available, recycle Micro Air Brake and computer control breakers. Conduct Air Brake Self-Test. If MR pressure is not available,Consult Shed. Chec...
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