WinGD X72 - Faults in High Pressure Fuel System; Defective Fuel Pump

Operation
0515−1/A1
Winterthur Gas & Diesel Ltd.
1/ 7
Faults in High Pressure Fuel System
1. Defective Fuel Pump 1..............................................
1.1 Fault Identification 1..........................................
1.2 Causes 1.....................................................
1.3 Procedure 1..................................................
2. Defective Fuel Pump Actuator 2.....................................
2.1 Fault Identification 2..........................................
2.2 Causes 2.....................................................
2.3 Procedure 2..................................................
3. Defective Injection Valve 4..........................................
3.1 Fault Identification 4..........................................
3.2 Causes 4.....................................................
3.3 Procedures 5.................................................
4. Defective Flow Limiter Valve 5.......................................
5. Defective Pressure Control Valve 6..................................
5.1 Fault Identification 6..........................................
5.2 Causes 6.....................................................
5.3 Procedure 6..................................................
1. Defective Fuel Pump
1.1 Fault Identification
Fault identification is as follows:
D Failure indication in the engine control system (ECS) (see 4002−2, LDU−20,
paragraph 3.15 Log Messages).
D Unusual noises e.g. knocks, scrapes and rings.
D The level switch LS3446A shows an alarm (see 8019−1, paragraph 4).
1.2 Causes
The causes of the defects are given below:
D The fuel pump is blocked.
D The safety device on the driving wheel is broken (see fuel 5556−1 Fuel Pump
and the Maintenance Manual 5556−2).
D Failure of the fuel pump.
1.3 Procedure
You must replace the defective fuel pump or high pressure (HP) fuel pipe as soon as
possible (see 5556−1 Fuel Pump, 5556−2 Supply Unit and the Maintenance Manual
8752−1 Fuel Pressure Pipes).
2014
Operation during Unusual Conditions