Maintenance
8790−1/A1
Winterthur Gas & Diesel Ltd.
1/ 3
Removal and Installation
1. Preparation
WARNING
Injury Hazard: The pilot fuel system has high pressure. Replace a
defective HP pilot fuel pipe only when the engine has stopped. You
must obey the data given in the Operation Manual 0520-1.
WARNING
Injury Hazard: Always put on gloves and safety goggles when you
do work on hot components. When screws and plugs are opened,
steam or fuel can come out and cause injury.
CAUTION
Damage Hazard: Make sure that you do not cause damage to the
sealing faces or the pilot fuel pipes. Do not apply lateral force to the
HP pilot fuel pipes and the flanges.
1) Stop the engine, refer to the Operation Manual 0310−1.
2) Set to off the fuel supply pump.
3) Make sure that the pilot fuel supply unit (2, Fig. 1) is set to off.
4) Make sure that the pressure in the Pilot Fuel Supply Unit is zero, refer to the
Operation Manual, 4002−2, paragraph 3.10 Pilot Fuel Pressure.
WCH03189
Fig. 1
2
1
Pilot Fuel
Pipe
Pilot Fuel
Pipe
I
I
For View I − I, see Fig. 3
1 Rail unit 2 Pilot fuel supply unit
HP Pipe Pilot Fuel
2016
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