Cause | Elimination Method |
Noise in gearbox | |
Bearing noise | Replace defective bearings |
Wear of gear teeth and synchronizers | Replace worn parts |
Insufficient oil level in the gearbox | Add oil. If necessary, eliminate the causes of oil leakage |
Axial movement of shafts | Replace the bearing fixing parts or the bearings themselves |
Difficulty shifting gears | |
Incomplete clutch disengagement | See subsection 5.1.1 |
Sticking of the spherical joint of the gear lever | Clean the mating surfaces of the spherical joint |
Deformation of the gear lever | Repair the deformation or replace the lever with a new one |
Stiff movement of fork stems (burrs, contamination of the stem seats, jamming of the blocking crackers) | Repair or replace worn parts |
Stiff movement of the sliding sleeve on the hub when the splines are dirty | Clean details |
Deformation of shift forks | Straighten forks, replace if necessary |
Spontaneous disengagement or fuzzy engagement of gears | |
Wear of balls and stem seats, loss of elasticity of retainer springs | Replace damaged parts with new ones |
Wear of the blocking rings of the synchronizer | Replace locking rings |
Broken synchronizer spring | Replace spring |
Worn synchronizer clutch teeth or synchronizer ring gear | Replace clutch or gear |
Oil leak | |
Wear of oil seals of primary and secondary shafts | Replace seals |
Loose fastening of gearbox housing covers, damage to gaskets | Tighten nuts (the moment is indicated in the application) or replace gaskets |
Loose clutch housing to gearbox housing | Tighten nuts |