Hacks, Mods, and Parts for your favorite Robot

Replacing a 4XX, 4XXX Brush Motor

This procedure covers replacing a defective brush deck motor on the 4XX, 4XXX and Dirt Dog robots.

The actual removal to the brush deck and brush deck motor procedure can be located in the Dirt Dog Dis-assembly page contained within this "How Do I" section.

I have brand new replacement motors available for $8 each plus $2 USPS shipping or $4 International.  Just click the Buy Now button below to purchase one.  This is just the motor and does not include the PCB or cable.

Shipping fee + Motor

After removing the brass gear from the defective motor, the next step is to press the brass gear onto the new replacement motor shaft.  A small vise is used to actually press the brass gear onto the motor shaft.  Make sure that the shaft is in direct contact with the two ends of the vise to prevent damage to the motor assembly.


The last steps involve using a soldering iron to de-solder the Printed Circuit Board from the defective motor and re-solder the PCB onto the new motor.