Replacement 40E Motor info:

The replacement part number is:

8013402 40 12V MOTOR

If you have an oil-filled drive you will have to replace or service this as it cannot be taken apart and put together. You will know if you have an oil-filled drive if you have pipe tape on the large plugs facing the membrane. You can also remove these plugs and see if oil is inside.

With an oil-filled drive, you can replace the complete motor drive:

8013994 40 MOTOR/DRIVE 12 V KIT 

Or, replace the motor and install a drive service kit:

8019114 DRIVE SERVICE KIT PS40/80/160 

Below is a video that covers the installation of this kit:

https://www.youtube.com/watch?v=oVox47I3DIc&list=PLJ7D5RAA4OpHlD0GTAkuSD8Pm6zlZLW3S&index=14&t=0s