Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
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Chapter II Maintenance for Main Structures of Engine
Section I Disassembly of Engine Assembly
I. Special Notices:
a) Before overhauling the engine, make sure to firstly disconnect the negative cable of the battery, or it will damage
the harness and other electric units;
b) Unless otherwise specified, rotate the ignition switch to LOCK position;
c) Whenever the air cleaner is disassembled, make sure to plug the intake port, in order to prevent the ingress of
foreign material, which may enter into cylinder and cause serious damage.
II. Disassembly Procedure
z Turn the ignition switch to LOCK position and disconnect the negative cable of the battery.
z Open the oil drainage bolt of the oil sump and fully drain and collect the oil.
z Fully drain the coolant.
z Disassemble the water inlet and outlet hoses of the engine.
z Disassemble the electronic control harness for engine ECU, engine, and complete vehicle.
z Disassemble the power supply wires for alternator, starter, and oil pressure and water temperature sensors.
z Remove the connecting hose between intake connecting pipe and air cleaner.
z Loosen the connecting pipe of inter-cooler.
z Shut off the fuel pipeline and unplug the fuel pipe and return pipe.
z Disconnect the power supply of the radiator fan and when necessary loosen the radiator bracket and take out the
whole radiator.
z Loosen the clutch connecting pipe.
z Disassemble relevant connecting pipes of air conditioner and power steering pump.
z Disconnect the exhaust manifold and exhaust muffler pipe.
z Loosen the connecting mechanism between transmission and the complete vehicle.
z Loosen the fixing bolts between engine and transmission suspension bracket.
z Steadily lower the engine with elevator.
z Loosen the connecting bolts between engine and transmission and separate the transmission from the engine.
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