The Graco parts book is the exploded diagram and part-number system Graco uses to identify every component in a sprayer. To find your part fast: locate your model number and series letter on the serial tag, open the matching parts diagram, find the numbered callout for the part you need, then match that number against the parts list to get the real Graco part number. If you're ever unsure, call 713-931-4102 with your model number — a parts advisor can confirm the exact number in under a minute.
1. What Is the Graco Parts Book?
The Graco parts book isn't a single physical book anymore — it's the manufacturer's system of exploded parts diagrams and part-number lists, organized by machine model and series. Every Graco sprayer, from a homeowner Magnum to a contractor-grade Ultra Max rig, has its own diagram showing every pump, seal, filter, and fastener with a corresponding part number.
The reason this matters: two sprayers can look identical and share a model name, but if they're from different production series, several of their internal parts may not be interchangeable. The parts book (and the diagram tool that replaced the old printed version) is what removes the guesswork.
Use the Order by Graco Sprayer Parts Diagram tool to search by machine model and pull up the matching exploded diagram — the digital equivalent of the old Graco parts book, updated for current production.
2. Why Part Numbers Matter More Than Model Names
A part description like "pump packing kit" or "prime valve" isn't specific enough to order correctly — several different packing kits and prime valves exist across the Graco lineup, each sized and sealed for a particular pump family. The part number is the only fully reliable way to guarantee fit.
Model Name Alone
"Graco 390 pump repair kit" could refer to several different kits depending on series and pump variant — not specific enough on its own.
Model + Series Letter
Narrows the search significantly, but some parts still vary by production run within the same series.
Exact Part Number
e.g. 18B260 — guarantees the correct fit every time, regardless of how the part is described elsewhere.
3. Step-by-Step: Finding Your Part Number
- Locate your model and series Check the serial tag on your sprayer — usually on the back of the cart frame or the side of the motor housing. Note the full model number and the series letter that follows it.
~1 minute - Open the matching parts diagram Go to Order by Graco Sprayer Parts Diagram and search by your machine model. This opens the exploded diagram specific to your sprayer.
~2 minutes - Find the numbered callout for your part Exploded diagrams number every component. Match the visual location of the worn or failing part to its callout number on the diagram — not just its general appearance.
~2-3 minutes - Cross-reference the parts list Each diagram has an accompanying parts list that converts the callout number into the actual Graco part number, plus a short description.
~1 minute - Confirm compatibility before ordering Check the part listing's compatible-models section against your specific series. If anything is unclear, call 713-931-4102 with your model and serial number before adding to cart.
~2 minutes
4. Real Part Number Examples by Model
To make this concrete, here are genuine Graco part numbers pulled directly from current parts diagrams — the kind of result you'll get once you've matched your model to its diagram.
| Component | Part Number | Fits |
|---|---|---|
| Pump Packing Repair Kit | 18B260 | Graco 390, Ultra 395/495/595, Ultra Max II 490/495/595, FinishPro 390/395 |
| Motor Repair Kit (X5 / LTS 15) | 17L282 | Graco Magnum X5, LTS 15 |
| Magnum Pump Repair Kit | 17V781 | Select Graco Magnum series machines |
| Power Flush Valve | 115648 | Graco Magnum sprayers (cleaning/flush function) |
| Prime Valve Seat | 15E022 | Graco 390 PC Cordless and related electric models |
| Drain Valve Kit | 239914 | Graco 390 PC Cordless and related electric models |
| Inlet Valve & Carbide Seat Kit | 246429 | Multiple Graco pump series — confirm against your diagram |
Notice that several of these numbers appear on more than one model's diagram — that's not a mistake. It's the parts book showing you exactly where Graco's platform genuinely shares components, discussed next.
5. Parts That Cross Over Between Models
One of the most useful things the parts book reveals is which components are shared across Graco's product families — and which aren't. Knowing this in advance can save a repair from turning into a multi-day wait.
Usually Shared
Pump packing kits, manifold filters, prime valve components, and common hose fittings often cross over between related model families — but always confirmed against the diagram, not assumed.
Rarely Shared
Pump cylinders, control boards, and structural frame components are typically model-and-series specific, even when two machines look nearly identical.
Assuming a part is "close enough" because it worked on a similar model is one of the most common — and most avoidable — ordering mistakes. The parts diagram exists specifically to remove that guesswork.
6. Common Mistakes When Looking Up Parts
- Skipping the series letter. Two machines with the same model number can have different part compatibility if they're from different series — always check the serial tag, not just the model name.
- Ordering from memory instead of the diagram. A part that fit a previous machine may not fit the current one, even if both are described the same way.
- Guessing at kit vs. individual part. Many repairs are covered by a single kit that bundles several related components — ordering the individual pieces separately is often more expensive and less complete.
- Not confirming before ordering when unsure. A two-minute phone call with your model and serial number is faster and cheaper than ordering the wrong part and waiting on a return.
Have Your Model Number Ready?
Search the parts diagram tool below, or browse the full parts catalog directly.
Search by Parts Diagram Browse Full Parts List7. Frequently Asked Questions
What is the Graco parts book?
It's the manufacturer's official reference system — exploded parts diagrams and part number lists organized by sprayer model and series. Each diagram shows every component with a matching part number so you can order the exact piece you need.
How do I find my Graco sprayer's model and series?
Check the serial tag on the machine, typically on the back of the cart or the side of the motor housing. It lists the model number and a series letter — the series letter affects part compatibility, so don't skip it.
Can I use a part number from one Graco model on another?
Sometimes. Wear parts like pump packing kits, prime valves, and hose fittings are frequently shared across related models. Structural and pump-specific components usually aren't. Always confirm against your specific model's diagram before ordering.
What if I can't identify the part I need from the diagram?
Call 713-931-4102 with your model number and, if possible, your serial number. Describing the symptom — leaking, won't prime, won't spray — is usually enough for a parts advisor to confirm the correct number before you order.
Where can I find manuals alongside the parts diagrams?
The Graco Manuals & Technical Data page has official operator and service manuals for most current and legacy models, useful alongside the parts diagram when you need torque specs or a full disassembly sequence.
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