Operation0820−1/A1
Winterthur Gas & Diesel Ltd.
2/ 7
Problem Possible Causes Procedure
The exhaust temperature of a
cylinder increases
The air flaps in the scavenge air receiver are
dirty or defective
Clean, overhaul or replace
the air flaps
The injection nozzles are worn Replace with the spare kit
The scavenge ports in the cylinder liner are
dirty
Clean the scavenge ports
There is a fire in the piston underside space See 0450−1
The exhaust valve has a leak Grind the valve seat and head
(see the Maintenance
Manual)
The exhaust thermometer of a related
cylinder is defective
Replace the exhaust
thermometer
Exhaust temperature of a
cylinder decreases
The injection nozzles are in an unsatisfactory
condition, the nozzle tip is broken, the flow
limiter valve cannot move
Replace nozzle tip or flow
limiter valve
The related cylinder receives less fuel
because of a leakage in the high pressure
pipes or injection valves
Grind the sealing faces or
replace defective parts (see
the Maintenance Manual)
The exhaust valve does not open. The
exhaust valve control unit or its hydraulic pipe
is defective
Cut out the injection and
exhaust valve control unit of
the related cylinder (see
0510−1 paragraph 1 and
0520−1 paragraph 2)
The exhaust thermometer of the related
cylinder is defective
Replace the exhaust
thermometer
The firing pressure of all
cylinders decreases
The flow limiter valve cannot move Do a check to make sure the
flow limiter valve is
serviceable, or replace
The engine speed decreases The speed setting from the speed control
system is decreased or not in the limits
Do a check of the speed
control system
The fuel injection quantity from the speed
control system decreased to prevent too
much load in heavy sea
A procedure is not necessary.
Usual operation
Hull resistance increased because of growth,
age of hull, propeller damage
See 0070−1 The Relation
between Engine and
Propeller
An injection valve is defective , an injection
pipe is defective
Cut out or replace the related
part (see 0510−1 paragraph 1
and 0515−1, paragraph 3.3.2)
The air and exhaust gas pipes are clogged See Scavenge air pressure
decreases
2014
Irregular Operation
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