An equipment drawing can show a washer floating well away from a bolt. That space may exist only to make the parts visible. Reading an exploded diagram as a photograph of an assembled object creates confusion immediately.
Follow the reference numbers
Start with one numbered component and locate its entry in the parts list. Then trace the indicated assembly relationship. Keep the drawing’s visual order separate from any written installation sequence: a parts illustration is not automatically a step-by-step procedure.
Look for what the drawing leaves unspecified
A gap in the picture does not tell you the working clearance. Likewise, a similar-looking fastener is not proof of an interchangeable part. Dimensions, materials and revision notes must come from the applicable documentation rather than your estimate of the sketch.
For a reading exercise, annotate a copy with two colours: one for information explicitly supplied, another for questions you still need answered. Use the exact equipment model when seeking clarification. The useful outcome is a clearer understanding of the illustration; actual maintenance still requires the correct instructions and suitable competence.