Yes, it IS 7.2V!! See my answer in the other thread.
From your photo, it looks like there's a gear box, but if you changed the motor...
Did you keep the gear box and if so, did you fit it correctly?
Where did you get this motor?
The pdf file is placed on a server where they sell refrigeration stuff, so itøs probably an employee or a family member that sells the motors privately. Have you got a link to where you got it?