If you have to do maintenance tasks to your PGO TR3 50 then it is usually a good plan to have a Workshop Manual for personal reference just in case you need to know how to remove a specific component like the Wheel and install it again efficiently.
PGO TR3 50 Workshop Manuals will provide you with certain diagnostic details for the car so if something is not working it will help you identify what the issue is and how you can resolve it. After that you can decide if this can be done yourself or in case the job is simply too big you are able to book your TR3 50 in with a suitable repair garage.
PGO TR3 50 manual