In the driving of the tractor, the engine power is suddenly insufficient, the operation is not uniform and the black smoke is emitted, and the knocking noise occurs when accelerating. The following describes the diagnosis and processing of the fault:
1. Air filter plugging: Check the air intake gap between the air cleaner and the housing. If there is no gap, remove the air filter cover and check if the filter element sinks. If it sinks, the filter element should be lifted. After installing the cover, keep a certain air intake clearance.
Second, the fuel injector regulator spring break: After finding fault single-cylinder, can check its injector, if necessary, can be equipped with a new injector for comparison to determine whether the original injector is faulty. If the needle valve sticks, it should be cleaned. If necessary, it can be ground. If the injector pressure regulating spring breaks, replace the new pressure regulating spring.
Third, the fuel injector needle stuck can not be closed: Should be in the engine running, for cylinder-by-cylinder oil cut test to find faulty single-cylinder, such as the injector needle valve should stick to the new nozzle.
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