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Check if the reverse shaft is wear or damage.
Check if the final shaft and gear are burn, wear or
damage.
Check bearings on gear box and gear box cover.
Rotate each bearing’s inner ring with fingers.
Check if bearings can be turned in smooth and
silent, and also check if bearing outer ring is
mounted on gear tightly.
If bearing rotation is uneven, noising, or loose
bearing mounted, then replace it.
Check oil seal for wear or damage, and replace it
if necessary.
Caution
y If remove the drive shaft from the crankcase
upper side, then its bearing has to be
replaced.
Final shaft bearing
Gear box cover
Counter shaft bearingReverse shaft bearing
Drive shaft bearing
Gear box
Reverse shaft
bearing
Counter shaft needle bearing
Final shaft bearing
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