Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
104
In disassembly or replacement of fuel injector, it is necessary to apply new copper washers and tighten fixing bolts for
fuel injector according to fixed torque at the same time. Otherwise, injection position of fuel injector will deviate from
correct position and this will make engine operation out of control.
7. Apply clean and intact sealing covers on disassembled components and keep them well;
8. After fuel injector replacement, carry out fuel injector matching with special diagnostic apparatus;
9. Keep pressing manual oil delivery pump on oil-water separator to provide low-pressure line with fuel oil until the
pump can not be pressed any longer.
Attention: Do not start the engine before the pump is filled up.
10. Recheck installed components, connect battery cable and start the engine for engine operation condition
inspection;
11. Apply special diagnostic apparatus to check current faults for existence and eliminate historical faults.
Remove battery negative cable.
For safety reasons: Confirm whether system
pressure is low prior to high-pressure system
disassembly.
Apply special tools and torque wrenches in
calibration.
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