变速器罕见弊病与诊断(国外英文资料).doc

变速器常见故障与诊断(国外英文资料) The transmission common failure and diagnostic maintenance data database leapfrog iveco manual transmission Common failure and diagnosis of transmission Common failures of transmission are: ringing, automatic jumping, disorderly, oil and heat. One, the transmission rings The noise in the transmission is benign and vicious. The sound is a lot of the noise caused by loose oil or lubricating oil in the transmission, loose after the wear of the bearing, and the excessive clearance of the gear after the gear is worn out. The noise of the gears varies with the speed and load of the car. And the vicious noise is the damage of the gear tooth or the tooth space is on the mat, and the noise is intermittent and regular. Once such a failure occurs, the stop check should be immediately checked and the reasons are excluded. Because the transmission is similar to the clutch, the sound of the two is difficult to distinguish. When starting the engine gear lever in the neutral position, such as a ring, but will tread down the clutch pedal to listen to, such as noise disappear, then sound generated by the transmission. The main reason for the sound of the transmission: Transmission bearings are often at high speed, heavy load conditions, and under alternating load, thus bearing roller (pearl) and the groove wear will happen, spots, such as fatigue spalling, ablation phenomenon, make bearing axial and radial clearance increases, impact and noise generation. The gear tooth has sliding friction from the top of the tooth to the tooth root when the gear is engaged, so the wear is unavoidable. Because of the wear and tear of the gears, the spacing of the mesh becomes large. As a result, the vehicle is moving, such as the start and change of gears that cause a crash. The deformation of the shaft and the deformation of the shell caused the distance between the center of the gear and the axis of the two meshes. The sliding keyway in the shaft and the sliding gears are