If you need to perform fixes on your own Enfield 550 Lightning then it will always be a good plan to have a Workshop Manual to use as personal reference should you need to know tips on how to take off a specific part such as the Wheel Bearing and fit it again correctly.
Enfield 550 Lightning Workshop Manuals gives you particular diagnostic wisdom on your car or truck so if something is not working it can help you determine what the situation is and easy methods to fix it. You will be able to analyse if this can be achieved yourself or that the job is just too big you are able to book your 550 Lightning into a decent mechanic.
Enfield 550 Lightning manual