If you want to carry out auto repairs on your Orion APL50QL then it will always be recommended to have access to a Workshop Manual for a guide if perhaps you want to know simple methods to take out a certain part such as the Brake Discs and match it again perfectly.
Orion APL50QL Workshop Manuals provide you with distinct diagnostic info for the car or truck therefore if something is wrong it will help you understand what the situation is and easy methods to fix it. You can then assess if this can be done yourself or in case the job is too big you can book your APL50QL in to a trusted repair garage.
Orion APL50QL manual