If you have to carry out maintenance on your Orion APL50QL then it is always a good idea to have a Workshop Manual for personal reference if you need to know the right way to strip off a particular part including Drive Shaft and install it again perfectly.
Orion APL50QL Workshop Manuals are able to offer unique diagnostic details on your car or truck so if something is faulty it helps you discover what the problem is and methods to resolve it. Then you are able to assess if you can do this by yourself or that the job is simply too big you can still book your APL50QL in with a decent mechanic.
Orion APL50QL manual