First, the reason why the tractor jumps automatically:
1. The internal gears of the auxiliary speed sliding gears are worn out, the sliding gears are thrown off under heavy load, and they are automatically cut and jumped.
2. The auxiliary shift fork wears or deforms, causing the sliding gear to produce axial shifting.
3, the shift lever does not push in the end, so that the sliding gear off the jump gear.
4. The locking groove of the locking steel ball and the fork shaft is seriously worn, so that the elasticity of the locking spring weakens and jumps.
Second, tractor automatic jumper maintenance:
1. Replace the auxiliary speed sliding gear.
2, replace the wear and deformation of the fork.
3, push the shift lever to the end.
4, repair or replace the lock spring

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