Operation
5562−1/A1
Winterthur Gas & Diesel Ltd.
1/ 3
Fuel Pressure Control Valve
1. General
1.1 Operation
CAUTION
Damage Hazard: In usual operation, make sure that the knurled
screw (10) is turned fully clockwise (down).
WECS−9520 controls the fuel pressure, which stays below the opening pressure of
the pressure control valve (1, Fig. 1). The fuel pressure control valve is usually closed
(see also 4002−1, paragraph 3.2 Pressure control).
If the fuel pressure is more than approximately 950 bar, the fuel pressure control
valve (1) opens and the pressure is released. The knurled screw (10) sets the correct
opening pressure.
DRIVING END
10
9
8
1
7
BA
4
216
013.408/05
3
5
016.861/08
Fig. 1: Location of Fuel Pressure Control Valve
1 Fuel pressure control valve 3.06 6 Leakage control pipe
2 Rail unit 7 Fuel shut-down pilot valve 3.08
3 Bearing oil drain 8 Fuel overpressure safety valve 3.52
4 Non-return valve 9 Fuel rail 3.05
5 Bearing oil supply pipe 10 Knurled screw
2014
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