Repair hitachi Drive Motor

I have several hitachi motors and have found out they are not working correctly. I have tried taking the top off and cleaning it and using a lubricant pen i purchased at radio shack and they spin more freely then before but are still broken. Is there anything else i can do to repair them or are they just dead?

 

replace them with a benq. hitachis are sh!t.

 

i obviously know that Benq's are better, i was looking for a solution to fix the motor's because i have a lot of them.

 

could probably buy new motors...but the time and effort spent on getting them to work, isnt really worth it IMO.

 

i was just hoping there was another way to repair the motors that i didn't try yet.