Common failures of auto parts speedometers include stuck needles, ruptured hearts, inaccurate data, and running noises.

The pointer is jumping erratically and the drum is not running properly: The cause is a damaged or worn gear on the transmission pinion or number wheel. In the structure of the internal meshing character drum, the character drum will not slip and rotate due to clip deformation, gear misalignment, burr flash or excessive wear of the reduction worm gear. When installing the odometer flexible shaft, it must not be bent too fast, so as not to hinder the rotation of the flexible shaft. Note that the bending radius should not be less than 150mm, otherwise the main shaft will be broken during use, the rotating shaft will be worn, and the odometer pointer will swing back and forth to reduce the service life.

The indication error is: when the indication reading of the odometer is inaccurate and the mileage has an obvious error, it is generally due to the loosening of the flange locking nut, which makes the original compressed odometer flexible shaft drive gear loose and slip. The 1090E car odometer flexible shaft driving gear is fixed by the hand brake drum flange lock nut, and is connected with the second shaft of the transmission. The nut is self-locking by the deformation of the four butterfly washers pressed into it. Excessive wear on instrument components and reduced magnetism can result in inaccurate data indications. When the driving gear driven by the odometer is loose and the driving gear is not pressed and slipped, so that the mileage reading is significantly lower than the actual value, check and tighten the locking nut of the transmission shaft flange to the specified torque of 1%-245 Nm. After each maintenance During this period, check the tightening of the flange lock nut, remove the odometer flexible shaft from the vehicle, the connector of the shaft, or clamp the square head of the spindle, pull out the flexible spindle, clean it with oil, apply grease, Then reinstall.

Roller does not work, pointer does not move: This is usually because the flexible shaft is stuck in the tube, the flexible shaft is broken; the protective tube joint comes out; the letter drum drive gear is stuck and worn, and the odometer is damaged. When replacing the flexible shaft of the odometer, be sure to find out the reason for the breakage of the flexible shaft and whether the main shaft of the odometer is a card issued. You can touch the mandrel jack behind the dashboard, turn it a few times to see if it works flexibly, and then install the flexible shaft. how many miles, even screwing it off in the first place). At this point, you must remove the odometer assembly, disassemble and inspect for damage to the gears or bent or deformed shafts. After proper adjustment, apply lubricating oil and reinstall it, then turn the shaft to see if the pointer and the font are working properly.

Running noise: It is found that the odometer makes a harsh noise during driving, mainly due to the lack of lubrication of the rotating shaft and gear in the odometer, resulting in dry friction. To remove the odometer assembly, you can put a few drops of lubricating oil into the square hole at the joint to eliminate noise.