Service Manual for WP6 Diesel Engine
8
19 Run the Engine
After the engine is started, firstly let it run idly for 2~3min, engine oil pressure should higher
than 120kPa. Do not suddenly run the engine in heavy load and high speed if coolant temperature is
lower than 60
o
C, otherwise it may affect abrasion resistance and reliability of the engine. The load
and speed should be increased gradually, try not to load or unload abruptly.
In run-in period (3000km), the engine is only suitable for moderate duty work and under.
It is allowed to run the engine in rated power and rated speed for normal use, but only no more
than 20min is allowed for overload running (105% rated speed or 110% rated power). Only idling
for 1~2min after unloading can the engine be shut down.
Parameters and check points that should always be noticed during normal use:
(1) Engine oil pressure (300~600kPa) (Idling≥120kPa);
(2) Engine oil temperature (80~105
o
C);
(3) Coolant outlet temperature (80~90
o
C);
(4) Turbine rear exhaust temperature≤550
o
C;
(5) Diesel fuel inlet temperature (40~45
o
C);
(6) Check the exhaust gas color to determine working quality of injector and load condition, if the
color is serious bad, stop the engine for inspection.
NOTICE: When the engine is in operation, check it for water leakage, air leakage and oil
leakage, and stop the engine immediately for troubleshooting.
Following diesel engine features should be fully aware by operator:
(1) The engine consumes less fuel when output torque is large, and fuel consumption rises as
engine speed increases.
(2) Output torque reaches the best value at intermediate speed range (1200~1600r/min).
(3) Engine output power increases as rotating speed gets faster, and reaches rated power at rated
speed.
NOTICE: To avoid damaging the diesel engine, cable to engine regulator and battery positive
mustn’t be disconnected. Unlike DC generator, it is strictly forbidden to check the voltage of
AC generator by transient grounding.
Notes for running the engine in cold environment:
(1) Fuel oil: Choose different brands of diesel fuel based on ambient temperature.
(2) Engine oil: Choose engine oil of different viscosity according to season.
(3) Coolant: Antifreeze additive is required for cooling system, choose different brands and
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