Operation and Maintenance Manual
of WP12C Series Marine Diesel Engine
3.6.5 Precaution for Operation
(1) With diesel engine started
ˈ
first let engine run at idling for a few minutes,
then increase the engine speed to 1000
̚
1200 rpm
ˈ
apply a partial load
ˈ
and only when the outlet water temperature is higher than 60
ć
ˈ
oil tempera-
ture is higher than50
ć
, it is allowed to operate at full load condition.
Increased the load and speed gradually
ˈ
and try as much as possible to
avoid a sudden application and removal of load.
(2) When diesel engine is within 60h running-in period, it is suitable to operate
the engine with medium load and below.
(3) It is not advisable to run engine at idling speed for a long time
ˈ
because
at this time, failures such as oil leaks.
(4) In the normal operation of diesel engine, it is allowed to operate continu-
ously at rated power and rated rpm
ˈ
and however, if engine operates with
103
ˁ
of rated rpm and 110
ˁ
of rated power
ˈ
it is only allowed to run 1 hour
for every 12 hours. With load removed from diesel engine, the engine can be
stopped only after idle running for 1-2 minutes.
(5) During operation, always pay attention to the parameters values and checking areas
˖
Oil pressure of main oil passage is 350
̚
500KPa.
Oil temperature of oil sump <110
ņ
Coolant outlet temperature 80+5
ć
ˈ
it should not exceed 95
ņ
Post turbine exhaust gas temperature <550
ņ/
Air inlet temperature after intercooler is 55±5
ņ/
Check the color of exhaust gas, through which, identify the work quality
and operation load condition of injector, if any serious color change is found,
stop the engine for check
Pay attention to checking the diesel engine for water leakage, air leakage, oil or
fuel leakage
ˈ
stop engine if any leakage is found, remove the trouble.
(6) Diesel engine operators should know the following characteristics of engine
˖
A) The fuel economy is the optimist with the engine medium speed ranging
from 60
ˁ
to 90
ˁ
of rated speed.
B) The engine power is increased with increase of the speed
ˈ
the rated
power reaches at rated speed.
C) Carry out the inspection and maintenance according to periodic inspection
and technical service period of diesel engine (see Section 9 of this Chapter).
In case of emergency shutdown, it is not only to quickly move the fuel cutoff
handle to the stop position
ˈ
but can also rapidly cut off the fuel injection pump
delivery pipe or to block the air inlet of air filter to stop the engine.
3.6.6 Operation of Diesel Engine in Winter
(1) Fuel: Select and use the diesel fuel of different brands according to the
outdoor temperature in winter
(2) Oil: Select the oil with different viscosities according the different seasons
(3) Coolant
˖ˈ
Select and use different brands of anti-freeze additive and
with different quantities to add into the cooling system according to the
outdoor temperature
(4) Starting: In winter, auxiliary starter may be used in winter, if required.
High-speed running with load applied can only be conducted when the oil
pressure and water temperature are normal after engine starting
(5) Battery: Before beginning of winter season, check the electrolyte level,
viscosity and cell voltage. If the diesel engine is not used at very low tempera-
ture for a long time, remove the battery, and store it in a warm room.
(6) Engine shutdown: When stopping the engine under cold weather, first
remove load, then run the engine at idling speed for 1~2 min, stop engine only
after all temperatures drop down, and pay attention to that it is not allowed to
drain the coolant with anti-freeze additive after engine shutdown, and if the
coolant is not added with the anti-freeze additive, than it is necessary to open
water drainage valve or water plug on the engine body and on the cover of oil
cooler so as to completely drain the coolant to prevent damage to engine by
freezing.
Operation and Maintenance Manual
of WP12C Series Marine Diesel Engine
Summary of Contents for WP12C350
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