WinGD X72 - Page 190

Operation0810−1/A1
Winterthur Gas & Diesel Ltd.
2/ 4
Problem Possible Cause Procedure
No air spring pressure, or pressure is too low Open the 3/2-way valve
35-36HA, adjust the pressure
to 6 bar in control air supply
unit A
The non-return valve on the exhaust valve (air
inlet to air spring) is incorrectly installed. You
can hear loud noises and the exhaust valve
does not fully close
Do a check and install
correctly (see the
Maintenance Manual 2751−2)
The starting valves cannot move or the
electrical connection is not connected
Do an overhaul of the starting
valves or connect the
electrical connection
Different causes Try to start the engine in the
opposite direction
The engine moves back
during the start sequence, or
does not get to the
applicable speed
A cylinder receives no starting air, or the
starting air is not sufficient (blockage in
starting air pipe). The solenoid valve(s)
CV7241 (to CV7248C) cannot move. The
cable to the CCM−20 is broken.
Do a check of the starting air
pipe, flame arrestor and
remove the blockage. Clean
or replace the related
solenoid valve(s), do a check
of the electrical signal.
The starting air pressure is too low. Fill the air bottles.
The engine turns on starting
air but receives no fuel. The
regulation of fuel injection
quantity is in the position 0%
The speed control system is defective. Does
not release a controlled fuel injection quantity.
Do a check of the electrical
signal from the CCM−20 on
cylinder #1 and #2 to the flow
control valve on the fuel
pumps.
The engine turns on starting
air but gets no fuel
The fuel rail pressure is too low. The pressure
control valve stays open.
Do a check of the pressure
control valve 10-5560_E0_1
(see 0515−1, paragraph 5).
There is heavy leakage in the high pressure
circuit (fuel) on the engine
Do a check for leaks, see
8019−1, paragraph 4.
The fuel booster pressure is not sufficient. The
pressure retaining valve is set too low. The
booster pump does not supply fuel.
Adjust the fuel booster
pressure.
The shut-off valves upstream of the engine are
closed (plant)
Open the shut-off valves.
No ignition during engine
start
The injected fuel quantity is too small. The
speed setting is too low.
Adjust the speed setting.
The fuel is not correct or its viscosity is too
high.
Prepare the fuel system (see
0120−1).
The starting air pressure is not sufficient to
turn the engine with sufficient speed.
Fill the air bottles.
The auxiliary blower or non-return valves in
the scavenge air receiver is defective.
Do an overhaul or replace the
auxiliary blower or non-return
valves.
The compression pressures are too low. The
piston rings are in an unsatisfactory condition.
The exhaust valves do not close correctly.
Replace the piston rings.
Grind the surfaces of the
valve head and valve seat
(see the Maintenance
Manual).
2014
Problems during Engine Start and Stop