WinGD X72 - General

Operation
2722−1/A1
Winterthur Gas & Diesel Ltd.
1/ 2
Injection Valve (FAST Nozzle)
1. General
Three injection valves (1, Fig. 1) are installed in each cylinder cover.
Fuel is used to operate the injection valves (1). When the injection valve operates and
the needle opens, a small quantity of fuel leaks out of the injection valve. This fuel
flows back through the control fuel return pipe (2). To prevent contamination of lube
oil with fuel, a fuel / lube oil leakage path drains through the fuel / lube oil leakage
pipe (3) to the plant (see 8019−1 Fuel System).
To disassemble, assemble and do tests of the injection valves, see the Maintenance
Manual, Chapter 2722−1.
1
2
3
4
5
6
7
5
4
3
2
7
1
9
8
WCH01213
WCH01213
Fig. 1: Location of Injection Valves
1 Injection valve 6 Connecting block
2 Control fuel return 7 Cylinder cover
3 Fuel / lube oil leakage pipe 8 Valve bush
4 Lube oil return 9 HP fuel pipe (injection valve)
5 Lube oil inlet
2014