My Robot Coupe is really load. What part R2NS needs to be replaced? Gear? Rotor? Motor?

[guest]

I meant to say it was really LOUD!

[ectofix]

Bad upper motor bearing.  When you remove & replace (or repair) the motor, also replace the motor seal.

 

FWIW:  A new motor is pricey (I’m guessing around $700).

 

I’m a tech, so I’ll remove the motor, test and inspect it, then replace both bearings.  Definitely not a simple task if you’ve never done it before.  Tools to do that are a suitable puller set, a hydraulic press, a megger…and some knowledge of what you’re doing.

 

Another alternative is to take the motor out (mark the wires so you know where they go) and then seek the services of a motor repair shop.