If you want to conduct maintenance on your own Norton Commander then it will always be a good idea to have access to a Workshop Manual for a reference in the event that you want to know easy methods to take off a particular part for example Clutch and fit it again perfectly.
Norton Commander Workshop Manuals gives you particular diagnostic wisdom with regards to your vehicle therefore if something is faulty it will help you figure out what the situation is and some ways to make it better. You can then assess if you can do this on your own or in the event the job is simply too big it is possible to make a booking for your Commander into a trusted car garage.
Norton Commander manual