It seems to be a fundamental problem for the product.
All the problematic products are the same gear problem.
The two gears in question must be repaired by opening the gearbox.[br]
It would be easy to get the same gear, but...[br]
A gear is cracked.[br]
The thickness of the steel pipe in the middle is larger than the gear hole, resulting in a crack.[br]
Secure the cracked gear with glue and expand the hole.[br]
Grind steel pipes to make the hunger thin.
https://youtu.be/4QJFvA5n3gs
=== 업데이트 (2019년 10월 23일) ===
The cracked side of the gear needs to be cut and glued. This ensures a constant gap between the teeth.
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=== 업데이트 (2019년 10월 23일) ===
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[image|1882721]
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The gears were first disconnected and then polished the bumpy part of the metal pin.Cut off the cracked part a little and fix it with a force adhesive. Apply a little glue to the metal pins and fasten them with the gears.
Gearbox gear repair.
It seems to be a fundamental problem for the product.
All the problematic products are the same gear problem.
The two gears in question must be repaired by opening the gearbox.[br]
It would be easy to get the same gear, but...[br]
A gear is cracked.[br]
The thickness of the steel pipe in the middle is larger than the gear hole, resulting in a crack.[br]
Secure the cracked gear with glue and expand the hole.[br]
Grind steel pipes to make the hunger thin.