The Tamiya 15422 JR Mini 4WD Pinion Puller in blue anodized aluminium is intended to streamline pinion removal during setup or maintenance. It is sized to suit common Mini 4WD service routines and storage options.
The puller seats between the pinion and the motor housing, and turning the end bolt draws the gear free in a controlled manner. This reduces the chance of damage to the motor shaft or the pinion itself compared with improvised methods.
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