4, to distinguish whether it is "benign" sound or vibratory sound The so-called benign sound, refers to the noise in the short term will not cause significant damage to the engine, the engine sounds when the air filter vibration noise generated by the high-pressure flashover Sounds and so on are mostly benign sounds. It should be noted that although these noises do not immediately pose a hazard to the machine, they are prone to failure and undue loss during driving. The so-called vicious noise refers to the sound that can cause serious damage to the machine quickly. At this time, the machine should be shut down immediately for inspection so as not to cause serious losses. Chassis Part 1, Clutch Disengagement (1) Disengages bearing from normal sound. There are usually two kinds of sounds: one is the continuous "click" sound; the other is the non-rhythmic "bang and bang" sound, and some are broken. These two types of sounds generally appear when the clutch springboard is fully depressed or slightly depressed, and the sound disappears when the pedal is raised. (2) The sound of the clutch friction plate is damaged. Due to the deformation of the driven steel plate and the friction plate, or the looseness of the friction plate rivets and the exposure of the friction plate, a continuous, high-pitched sound will appear, usually appearing at the moment of clutch disengagement or engagement. (3) The clutch driven plate key groove is worn or the rivet is loose. There will be a kind of no-rhythm, slight "drum, cracking" impact sound, which usually occurs when the engine is idling, and when the clutch pedal is pressed, the sound is weakened or disappears. 2. Abnormal noise of gearbox (1) Too loud or too loud sound of gear side clearance. When the locomotive hears the "trigger and buzz" tooth surface impact sound, the relative steady-state noise of the surface speed disappears, which is generally the noise when the clearance of gear teeth of the gearbox is too large. If there is a continuous "click" sound, and the louder the faster the car speed, at the same time feel Guadang effort, usually gearbox side gear clearance is too small. (2) The sound of the gearbox ball bearing æ—·. When the ball bearing clearance is too large, the inner ring of the bearing is loosely fitted with the shaft, the looseness of the outer ring of the bearing and the box body, or the bearing is seriously damaged, the transmission box emits a relatively loud noise, which is usually a broken sound of “crashing, crashingâ€. .
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