Baotian BT49QT-28, Руководство по обслуживанию

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Inspection
Inspect if there is slot or pit in bearing cup
and bearing top. If there is, effect
replacemented.
Inspect for completeness of bearing balls
and if there is, effect replacement with new
ones.
Inspect for proper tightness of steering stem and if not, effect adjustment and fasten it.
Inspect for correct position of bearing cup and bearing top and if not, effect correct
mounting.
Bearing Cup and Bearing Top Replacement
Remove bearing cup and bearing top with special bearing cup and bearing top
removers.
Mounting
Apply grease to bearing cup and bearing top at the bottom.
Mount in order bottom bearing cup, bearing ball set, bottom bearing top on the bottom
of steering stem.
Pass steering stem through head tube.
Apply grease to top bearing cup and bearing top.
Mount in order upper bearing cup, bearing ball set and upper bearing top on the upper
part of steering stem and fasten them.
Torque: 15 N
·
m
Turn front fork right and left to effect close contact of bearing balls.
Loosen upper bearing top to torque 0 and fasten it.
Torque: 2.5N
·
m
Fix upper bearing top and tighten steering stem setting nut.
Torque: 70N
·
m
Turn front fork and confirm easy rotation without loosening.
Lock set nut.
Mount front shock absorber together with front wheel.
Mount handlebar bolt, bush and nut.
Mount handlebar.
Mount front body covering parts.
upper bearing to p
b all set
ball set
bottom b earin g cup
bottom b earin g top
u pper bear ing cup