WinGD W-X82 Operation Manual page 233

Failures and Defects of WECS Components
Failure Text ME fuel rail pressure low (ID 31)
Indication
Cause Fuel rail pressure is 100 bar less than the fuel pressure setpoint (failure signal is released
after 10 seconds).
Remark: No failure shown during the conditions that follow:
No engine operation, no start command, fuel rail pressure very low
Procedure ⇒ Make sure that the toothed rack can move freely.
⇒ Make sure that the fuel pump actuators are set to on and operate correctly.
⇒ Do a check of the actuator alarms in the AMS (alarms can show mechanical problems).
⇒ Make sure that the fuel supply pressure is between 7 bar to 10 bar and the pressure down-
stream from the pressure retaining valve is 3 bar to 5 bar.
⇒ Do a check for leakage alarms.
⇒ Make sure that there is an oil supply to the fuel pressure control valve 3.06. Make sure that the
valve seat can move.
⇒ Examine the fuel pressure control valve 3.06 for leaks (if the fuel pressure control valve has a
leak, you can hear a loud noise like a whistle).
⇒ Do a check for damage on the non-return valves 3.22, 3.81−1 and 3.81−2 in the fuel pump
covers.
⇒ Adjust the toothed racks to the correct clearances at the minimum / maximum positions.
⇒ If necessary, replace the fuel pump actuators.
⇒ Repair all the leaks in the system.
⇒ Replace the defective valves.
⇒ Grind the sealing surfaces on the HP fuel pipes between the fuel pump and the fuel rail if leaks
are found, or isolate the pipe(s) temporarily until a repair is possible.
Winterthur Gas & Diesel Ltd.
Operation
FCM−20 No.
#03 and #04
LED
AI1
23/ 39
0850−1/A1
Failure ID Display
31 31
2014