Tile burning precursors: speed suddenly drops, diesel engine work load, engine smoke, oil pressure drop, send out "chirp" dry friction in the crankcase, this was the beginning of the tile burning.Encounter this kind of circumstance should immediately stop, otherwise it will further aggravate the bearing wear, shaft neck surface scratch stick rapid expansion, bearing and shaft neck, will soon be felt, holding in death of the engine stalled.Valve down cylinder precursors: valve into the cylinder, usually because the valve rod broken, valve spring break, valve spring seat craze, valve lock clamp fall off wait for a reason.
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