Operation
8019−1/A2
Winterthur Gas & Diesel Ltd.
13/ 13
4.6 Injection Control Unit − Leakage
WARNING
Injury Hazard: Always put on gloves and safety goggles when you
do work on hot components. When drain screws and plugs are
opened, fuel can come out as a spray and cause injury.
If the level switch (22, Fig. 1) (LS3446A) or (23) (LS3447A) activates an alarm and no
leakage was found during a check of the HP fuel pipes 3.47 (1, Fig. 6) in
paragraph 4.5, do the procedure that follows:
1) On the drain pipe (3, Fig. 7), carefully loosen the screw-in union (4)
approximately two turns.
2) If fuel flows from the screw-in union (4) more than usual (compared to the
amount of leakage from the other ICU), the fuel quantity piston of the related
ICU (1) is defective.
WARNING
Injury Hazard: The fuel system has high pressure. Replace a
defective injection control unit (ICU) only when the engine has
stopped.
3) Remove the ICU (1) from the fuel rail (2). For the procedure, see the
Maintenance Manual 5564−1.
4) Send the defective ICU (1) to WinGD for an overhaul. As an alternative, you can
use the fuel quantity piston kit CX55414 and do an overhaul on board.
2
WCH01157
1
4
3
Fig. 7: Leakage Inspection Points − Injection Control Unit
1 Injection control unit 3.02 3 Drain pipe (Fuel quantity piston)
2 Fuel rail 3.05 4 Screw-in union
2015-05
Fuel System 9-cylinders
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