WinGD X72 - Engine Control System Checks; General; Control Air Supply Unit

Operation4003−1/A1
Winterthur Gas & Diesel Ltd.
4/ 11
4. Engine Control System Checks
If parts of the pneumatic control system were disassembled, removed or replaced
during an overhaul, you must do a general check before commissioning.
CAUTION
Equipment Hazard: Leaks can cause faults in the engine control
systems and damage to engine components. Leaks that are found
during the engine control system checks must be repaired to
prevent damage to equipment.
You can do checks on all functions. Interlocks give protection against, and prevent,
maneuvering errors.
For data about the applicable pressure and temperature ranges, see
0250−1 Operating Data Sheet, Pressure and Temperature Ranges at Continuous
Service Power MCR.
For data about alarms and safeguards, see 0250−2 Operating Data Sheet, Alarm and
Safeguards at Continuous Service Power.
4.1 General
Note: For data about the item numbers (e.g. 30-4325_E0_1), see 4003−2 Control
Diagram.
1) Open the indicator valves.
2) On the starting air bottles, close the shut-off valves 930−V03 and 930−V04.
3) Use the handwheel to close the starting air shut-off valve 30-4325_E0_1.
4) Open the ball valves 30-8605_E0_6 and 30-8605_E0_7 to release the pressure
in the starting air manifold.
5) Open the ball valve 35-8353_E0_2 to remove air from the starting air supply pipe.
6) Release the pressure in the control air bottle 35-287HA.
7) Engage the turning gear.
8) Make sure that the servo oil service pump 20-8445_E0_1 is set to off (main
switch).
4.2 Control Air Supply Unit
1) At the connection A2, open the 3/2-way valve 35-36HC to supply 30.0 bar to the
control air supply unit.
2) Make sure that the 3/2-way shut-off valve 35-36HA is open.
3) Use the pressure reducing valve 35-19HA to set the air pressure to 6.0 bar for
the air spring and control air.
D Do a check of the pressure on the pressure gage PI4411L.
D Do a check of the pressure on the LDU-20, MAIN page.
4) At connection A1, open the 3/2-way valve 35-36HB to supply 8.0 bar to the
control air supply unit.
5) Use the pressure reducing valve 35-23HA to set the air pressure to 6.5 bar for
the air spring and control air.
D Do a check of the pressure on the pressure gage PI4401L.
D Do a check of the pressure on the LDU-20, MAIN page.
6) Make sure that air flows to the 3/2-way valve 35-31HA.
2015-03
Engine Control