Graco 390 PC & Hi‑Boy Sprayer Parts: Full OEM Coverage & Jobsite Reliability
The Graco 390 PC Hi‑Boy electric airless sprayer is a lightweight powerhouse—ideal for trim, cabinets, punch-list touch-ups, and residential coatings projects. Despite weighing under 40 lb, it delivers up to 0.54 gpm at 3,300 psi, matching tougher rigs in job performance. Keeping this reliable sprayer running means stocking genuine paint sprayer parts made to OEM spec. Whether you’re experiencing leaking seals, pump issues, or pressure faults, SprayersandParts.com carries every component you need to keep spraying.
Why OEM Graco Parts Make a Difference
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Built to Last: Chromex piston rods resist wear from silica-based fillers and carry longer than aftermarket rods.
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High-Temp Seal Reliability: V‑Max Blue packings remain flexible up to 120 °F, whereas cheaper seals harden prematurely and damage internal rods.
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Pressure Tested Hardware: Critical components like manifold blocks are hydro-tested up to 4,950 psi—so clean-out spikes or overpressure don’t crack castings.
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SmartControl Electronics: Factory-calibrated boards keep pressure within ±1% across coats—precise control matters when swapping graco spray tips or finishing with trim sprayers.
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Warranty Compliance: OEM parts maintain lifetime warranties on components like Chromex rods and Advantage Drive systems.
Key Specs & Popular Maintenance Kits
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Max Flow Rate: ~0.54 gpm (2.0 L/min)
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Max Pressure: 3,300 psi / 227 bar
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Motor: ⅞ HP Totally-Enclosed Fan-Cooled (TEFC) DC motorSprayersandparts.com
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Packing Kit: V‑Max Blue™ rod seals (Graco part 17Y297)
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Pump Rod: Chromex® stainless model 248206
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Filter: Easy-Out™ 60-mesh manifold screen (part 181072) compatible across graco airless sprayer accessories
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Included Tip / Guard: RAC X LP tip pre-installed (guards fit all graco spray tips)
Cross-Compatible Part Benefits: One Bin Covers Multiple Rigs
Thanks to Graco’s modular platform, your 390 maintenance kit helps keep other sprayers in service:
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Magnum X7 & LTS 17: Share manifold filter inserts, transducers, and guards. Housing adapters like 17M223 streamline tip interchangeability. Use graco magnum x7 parts as spare accessories to support both systems.
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Ultra Max II 490, 495 PC, and 595 PC: Swap filters, Chromex rods, and even control boards via simple reprogramming—no redundant stock needed.
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GMAX 7900 Gas units: Use the same 60‑mesh filter and guard systems across these gas machines and electric rigs to unify servicing.
Standard Maintenance Practices for 390 Hi‑Boy Rigs
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Track volume and time: Replace seals and packings every ~750 gallons of latex or 400 gallons of alkyd coating.
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Flush in warm water (~40 °C) after use: Helps dissolve acrylic residue faster and prevents transducer clogging.
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TSL lubricant care: Apply two drops on Chromex rods each shift—keeps rods safe and delivers smooth pressure delivery.
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Torque checks: Crankcase bolts should be re‑torqued monthly (~20 Nm) to prevent gear wear.
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Redundant spares: Keeping one extra 60‑mesh filter and $200 pump kit in your toolbox beats suffering a $4,000 work delay.
Comprehensive Parts Coverage from Our Catalog
When browsing SprayersandParts.com under the Graco 390 PC Hi‑Boy category, you'll find:
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Fluid sections (pump lowers), suction tube/hose assemblies, manifolds, handles, and guards
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Trigger gun models like FTx-E contractor guns pre‑configured to support smaller tip fans
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Control boards, motor shield kits, suction strainers, and pressure drain valves.
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Kits for rebuilds—packing, pump lower swaps, electronics, guards and spray tip extensions
Every listing includes part numbers, thread sizes, bar rating, and full compatibility notes.
Integration with Other Graco Products & Use Cases
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For general painting, pair the 390 Hi‑Boy with a graco electric paint sprayer like the Ultra Max II 495 PC or Magnum series—easy tip and guard syncing within graco airless sprayer accessories ensures consistent spray behavior.
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When fine finishing cabinetry or trim, drop in graco fine finish sprayers components or smaller fan tips; the SmartControl board adapts instantly.
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Cross-stock components like tip guards, suction tubes, and hose sets help standardize your field kits—fewer mismatches, faster repairs.
Tips on Repairs and Local Support
If your pump leaks or the SmartControl board fails, consider these steps:
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Order a pro-connect pump lower replacement for a fast, tool-free swap
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Keep spare Chromex rods, filter inserts, and TSL fluid on hand
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If infield diagnosis is needed, search for local service using "graco pump repair near me" to find certified technicians familiar with SmartControl diagnostics and pump replacement procedures.
Frequently Asked Questions
Q: Are parts for the 390 Hi‑Boy still available even though it's discontinued?
A: Yes—Graco maintains parts for legacy models like the 390 PC, and SprayersandParts.com stocks OEM filters, rods, electronics, and more.
Q: Can I swap tips while spraying if changing coatings mid-job?
A: Absolutely—with graco spray tips like RAC X SwitchTips, fan size swaps are tool-free. The SmartControl board tracks pressure and prevents overspray even at low psi.
Q: Will Magnum X7 accessories fit this sprayer?
A: Some accessories—like guards, tip cleaners, and suction tubes—are compatible across the 390 and Magnum X7 systems. Keeping a set of graco magnum x7 parts on hand can be helpful for small patch jobs or hydraulics backups.
Why Stock OEM Parts & Accessories
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Reliable aftermarket warranty: OEM parts keep warranty intact
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Performance under pressure: Designed to withstand 3,300 psi spray lines and chemical exposure
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Faster repairs: Shared components across Graco platforms streamline spares needs
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Expert support: SprayersandParts.com offers detailed part diagrams and service recommendations
Final Thoughts
The Graco 390 Hi‑Boy electric sprayer remains a highly workhorse model for contractors who appreciate portability and jobsite flexibility. With proper maintenance using genuine paint sprayer parts, including Chromex rods, manifold filters, and SmartControl boards, you can keep it performing as expected—even years after it's discontinued.
Integrate it into your fleet using graco electric paint sprayer models for full coverage—enhanced further by shared airless sprayer accessories, cross-compatible fine finish parts, and even magnum x7 parts for patch sprayers and small areas.
Need help choosing the right parts, finding interpreted parts diagrams, or tracking down local service using "graco pump repair near me"? I’d be glad to help streamline your workflow.