If you need to undertake repairs for your Diamo Velocity 150 then it is usually recommended to possess a Workshop Manual to keep just for a reference in case that you need to know tips on how to remove a specific part for example Wheel and match it again in the right way.
Diamo Velocity 150 Workshop Manuals gives you special diagnostic wisdom for the vehicle therefore if something is faulty it helps you ascertain what the problem is and tips on how to make it better. You can then analyse if this can be achieved by yourself or in the event the job is simply too big you could book your Velocity 150 into a suitable mechanic.
Diamo Velocity 150 manual