Ogawa ACTIVO TREK PRO T8-1 Service Manual page 21

Remove Drive Motor
Step 1: Follow Remove Motor Hood instruction to remove the motor hood.
Step 2: Use 17mm wrench to open drive motor
Step 3: Remove the Drive Motor and motor bracket set.
bracket tension nut, then remove washers
and tension spring.
Step 4: Use 5mm Hex. L-Shape wrench to open Drive
Motor bracket.