How to Prepare a Service Manual PDF for a Shoppable Parts Diagram
The diagram is only as good as the page you start from. Here is what to look for in a service manual before you upload or trace it, and who actually owns the drawing.
Published 2026-10-19
Most parts diagrams start life buried in a service manual: a 40 to 400 page document with one exploded-view drawing and its parts table somewhere in the middle. Before any tool, human or automatic, can turn that page into something clickable, the page itself needs to be usable, and you need to be sure you are allowed to use it.
This guide covers finding the right page, telling a vector PDF from a scanned one, getting a usable scan if that is all you have, and the question most guides skip: who owns the drawing you are about to publish.
Finding the Right Page
Manuals usually separate the exploded-view and parts-list section from the main repair instructions. Check the table of contents for a heading like "parts list," "exploded view," "spare parts," or a numbered section near the back of the document. The page you want has a numbered line drawing of the assembly, with a table nearby, usually the facing page, listing an item number, a part number, a description, and a quantity for each part.
Some manuals cover several models or configurations on one set of pages, with a shared drawing and separate columns in the table for each variant. If that is what you have, confirm which column applies to the model you actually stock before you build anything on top of it.
Vector PDF or Scanned PDF
A vector PDF, sometimes called a text-layer PDF, was generated digitally, usually exported straight from the manufacturer's own publishing software. The text and numbers in it are real, selectable text, which is what makes it possible to read the parts table directly rather than guessing from pixels.
A scanned PDF is a photograph or scan of a printed page saved as an image, with no text layer at all. Reading the numbers off it, whether you are doing it by eye or a tool is doing it for you, depends entirely on how legible that image is.
You can tell which one you have in seconds: open the PDF in any reader and try to select a line of text with your cursor. If it highlights like normal text, it is a vector PDF. If nothing selects, or you get a solid box instead of text, it is a scan.
If You Are Starting From a Scan
Scan or photograph the page at a resolution that keeps the smallest callout number legible at a normal zoom level, not just readable when you squint. A flatbed scanner beats a phone photo for flatness and even lighting; phone photos tend to introduce the keystoning and glare that make small numbers unreadable.
Keep the page square to the frame. A rotated or skewed scan is harder for anyone, human or software, to read accurately, and it is one of the easiest problems to avoid by checking the preview before you move on.
If the only copy you can find is a low-quality photocopy of a photocopy, it is worth asking your supplier or the manufacturer directly for a cleaner digital copy. Many manufacturers already publish service manuals as PDFs for exactly this kind of use.
Isolating the Drawing and Its Parts Table
If the manual spans several models per page, crop or export just the single exploded-view page you need rather than uploading the whole document. Keep the drawing and its parts table together in whatever you upload or trace from, since one without the other is only half the information.
Check whether the item numbers on the drawing match the "item no" column in the table one for one. Most manuals number this way, but a few number by sheet or by sub-assembly instead, which is worth knowing before you start matching numbers to products.
If your catalog spans many models, you will be doing this once per exploded-view page, not once per manual. A single service manual can contain a dozen separate diagrams, one for the engine, one for the chassis, one for the electrical harness, each needing its own pass through this guide before it is ready to publish.
Who Actually Owns This Drawing
An exploded-view drawing and the manual it comes from are a copyrighted work published by the manufacturer. Selling the parts shown in it does not automatically give you the right to reproduce the manufacturer's artwork on your own website; those are two separate things.
Before you publish a diagram built from a manufacturer's manual, check whether your dealer or distributor agreement already covers using their service materials, and whether the manufacturer publishes the manual publicly for exactly this kind of use, which many do. If you are not sure, ask the manufacturer directly, or treat it as the safer default to commission your own photography or redraw the diagram rather than republish their page as-is.
This is not a step to skip because it feels like paperwork. It is the difference between a parts diagram you have the right to run and one you do not.
What Happens Next
Once you have a clean page and you are sure of your rights to use it, you are back to the same three paths covered in our guide on adding a clickable parts diagram to a Shopify product page: trace it into an image map yourself, place hotspots by hand in an app, or upload it to a tool that reads the drawing and the parts table automatically. DiagramCart, for example, reads vector PDFs, scanned PDFs, and plain images the same way, so a clean scan from this guide works regardless of which path you choose.