Stop Of Diesel Engine - Baudoulin 4M11G Maintenance Manual

Maintenance Manual of 4M11 Series Diesel Engine For Land Power Generators
electrolyte and unit voltage of the battery. If the diesel engine is not to be used for a
long time and is under extremely low temperature, disassemble the battery and store in
a warm indoor place.
(6) Stop: To stop the engine under cold weathers, unload the engine, idle the engine for
(1~2) min, and wait for all the temperature to cool down before stop. Please be noted
that it's disallowed to drain the coolant containing antifreeze additive after the stop of
the engine. If the coolant contains no antifreeze additive, make sure to open the water
drainage valves or water plugs on the engine block, oil cooler cover, radiator, and
water inlet pipe to fully drain the coolant, in order to prevent the frozen cracking of the
engine.
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Stop of Diesel Engine

Avoid the stop of engine under full load. Before stopping the engine, reduce the load and
speed and run the engine under idling or low-load condition for 3~5min. This is intended to
cool down the piston, cylinder sleeves, bushings, shaft sleeve, and turbocharger for a
sufficient time, in order to prevent the cylinder scuffing and bushing scratch. This is
especially important for a turbocharged diesel engine. The bearings and oil seals in the
turbocharger are subject to the influence of the high temperature exhaust gas. This heat is
carried away by the circulating engine oil during the running of the diesel engine. If the diesel
engine is stopped suddenly, the turbocharger temperature will increase remarkably to cause
overheating, which will lead to seizure of bearings or failure of oil seals.
Rotate the key switch to position "OFF" or press the stop button to stop the engine, till
the flywheel stops rotation or the speed indication on the instrument panel is zero.
If the diesel engine circulating coolant is not added with antifreeze, ensure to drain the
coolant after stop in cold days, in order to prevent the frozen damage of diesel engine. The
water drainage valve is located beneath the engine oil cooler. Rotate the water drainage valve
switch to drain the water from diesel engine. In addition, disassemble the water drainage plug
from the radiator to drain the coolant from the radiator.
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