Operation and Maintenance Manual forWP10 Series Four-valve Diesel Engine (China IV, V)
Special Notice
● Before operating the diesel engine, please always read this Operation and Maintenance Manual carefully, and
follow the technical operation and maintenance practices therein strictly.
● As the diesel engine has been tested strictly according to the related test specification, it is prohibited to
increase the engine power by changing the ECU data without permission, otherwise, the warranty service
commitments of Weichai will be invalid.
● The ECU, common-rail fuel pump and injector are of precision components, it is prohibited to disassemble at
will; otherwise, the warranty service commitments of Weichai will be invalid.
● The turbochargerotor shaft is of precision and high speed rotation component, it is prohibited to disassemble
or impact with hard objects; otherwise, the warranty service commitments of Weichai will be invalid.
● For the important bolts of diesel engine (such as main bearing bolt and connecting rod bolt), there are strict
requirements on tightening torque and rotating angle, it is prohibited to unscrew or dismantle at will. The
connecting rod bolt can be used only one time. Otherwise, the warranty service commitments of Weichai will
be invalid.
● The diesel engine should use the oil and fuel specified in this Operation and Maintenance Manualand they
should be filtered with special clean filters in filling (the fuel should also be deposited for 72h before being
added). Check the coolant and oil level every time before starting the engine.
● It is prohibited to run the diesel engine without air filter to avoid the unfiltered air from entering the cylinders
directly.
● For the new diesel engine, 50h test run shall be performed before normal using.
● After the engine is started in cold state, please run it at idle speed for a while (do not run it at idle speed for a
long time) and then increase the engine speed slowly. After running under heavy load, do not stop the engine
immediately (except in special cases), you should run the engine at low speed for 5~10 minutes before
stopping.
● Please check the coolant periodically and replace it if necessary. It is prohibited to use cold water or
low-grade coolant.
● Inspection and repair of the electrical system components of diesel engine should be carried out by
professional technicians.
● Inspection and repair of the electronic control system components of diesel engine should be carried out by
professional technicians of Weichai Service Station.
● In general, the oil seal period of diesel engine is one year, please check and take necessary measures if
exceeded.
● The key components (such as turbocharger, injection pump, injector, ECU, exhaust after-treatment system
and EGR system) related to engine emission should be replaced with that of the same model of same
manufacturer. Otherwise, Weichai will not bear any responsibility for the diesel engine damage caused due to
not using the specified spare parts.
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