1. The tooth surfaces of the bevel gears are meshed at different heights, causing noise when the gears are running at high speed; loosen the bevel gear fastening screws with different meshing heights on the tooth surfaces, and loosen the shaft sleeves that are in contact with the bevel gear shaft. screw, tap the high and low positions of the spur gear surface with a knock bar, and then tighten the fastening screws of the bevel gear and the shaft sleeve respectively
2. The sound is caused by the axial loosening of the upper shaft, vertical shaft and lower shaft; the two fastening screws of the gear should be loosened, and the axial clearance of the vertical shaft and the upper and lower shafts should be readjusted.
3. The meshing clearance of the bevel gear tooth surface is too large or too small, resulting in a sound failure; it can be corrected by tapping the sleeve. Generally, the meshing clearance of a pair of gears is between 0.20-0.40mm
4. After the above three adjustment gears, the sound is not ideal; you can add a small amount of grinding paste on the two pairs of meshing tooth surfaces, and turn the upper wheel forward and reverse by hand, about 10-15min. Use gasoline to clean the dirt, add a little lubricating oil, and then adjust the gap as required
5. The rotary hook is seriously worn, and the matching clearance is large; the axial clearance between the rotary hook and the shuttle frame is 0.07mm, the radial clearance is less than 0.02mm, and the circumferential clearance is less than 0.15mm. At the same time, pay attention to the normal oil supply of the rotary hook
6. The parts are seriously worn and the matching clearance is large; the machine should be fully adjusted
