Initial operation
Fuel system
A3.05.07.00
M20-M601C
en / 11.12.1997 BA000018 1/1
Ĺ
Fuel system
After a long break from service and/or before the initial operation with heavy and destillated fuels
we recommend:
• Remove the fuel injectors according to A5.05.07.07.01.nn.
• Check the nozzles and opening pressure according to A5.05.07.08.01.nn.
The rule is: heavy fuel - cooled nozzles
distillate fuel - uncooled nozzles
If an engine equipped for heavy fuel, is to be only temporarily run on distillate fuel, it will not
be necessary to fit uncooled nozzles.
• Drain the day fuel tank, remove the sludge and refill.
• Clean the fuel filter according to A5.05.07.12.01.nn.
• Ensure that all cocks and valves are in the correct position.
• Vent the fuel system.
Use auxilary fuel pump. In case the day tank is at a higher level and the pump has a bypass
line: open the stop valve at the pump.
• Check for smooth operation of the control rack linkages:
Each individual control rack has movement in both directions so as to give perfect operation.
• Set all equipment parts of the fuel and nozzle cooling systems into the operating position.
• Switch the fuel circulating pump on and check the vent screws, flange connections and
threaded pipe unions for leaks.
Additional preparation work for heavy fuel operation
(see A3.04.07.nn)
• Switch on all necessary preheaters for the correct time.
• Switch the fuel circulation pump on.
The fuel temperature before the injection pumps is to be checked according to its viscosity
(see A1.06).
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