The Graco 246381 pump repair kit is a complete rebuild kit that fits the Graco 390, 395, 490, and 495 PC airless sprayers. It includes upper PTFE packings, lower leather packing, inlet valve, outlet valve, throat seal, and all o-rings. Installation takes around 45 minutes. Available from SprayersParts at up to 40% below dealer pricing — in stock and ships same day.
The Graco 246381 is a complete pump rebuild kit designed to restore a worn-out Graco airless sprayer pump to full factory performance. When your Graco 390, 395, 490, or 495 PC starts losing pressure, cycling constantly, or leaking paint from the throat, the pump packings and valves are the first thing to replace — and the 246381 kit contains everything you need to do the job in one purchase.
Rather than buying individual seals, packings, valves, and o-rings separately (and risking getting the wrong part), this complete kit bundles every wear component for a proper rebuild. It's the most cost-effective way to bring a failing pump back to full 3,300 PSI performance.
2. What's Included in the 246381 Kit
Upper PTFE Packings
Chemical-resistant for all coating types
×2
Lower Leather Packing
Compression sealing for piston bore
×1
Throat Seal (V-Packing)
Stops leakage past the displacement rod
×1
Outlet Valve Assembly
Stainless ball + hardened seat
×1
Inlet Valve Assembly
Stainless ball + spring + seat
×1
O-Ring Set
NBR o-rings + backup rings, all ports
×8
Piston Rod Seal
Primary bore seal for piston rod
×1
Installation Instructions
Illustrated guide with torque specs
×1
What's NOT included: Throat Seal Liquid (TSL) and the packing wrench (218203) are not in the kit but are essential for the job. Order them alongside the 246381 to avoid delays.
3. Compatible Sprayer Models
The 246381 kit is confirmed compatible with the following Graco airless sprayer models:
Graco 390 PC
Graco 390 Hi-Boy
Graco 390 Stand
Graco 395 PC
Graco 490 PC
Graco 495 PC
Not sure if this kit fits your specific serial number? Call us at 713-931-4102 and we'll verify before you order.
4. OEM vs Aftermarket — Which Should You Buy?
Feature
Genuine Graco OEM
SprayersParts Aftermarket
PTFE Packing Material
OEM PTFE
OEM-spec PTFE
Valve Ball Material
Stainless steel
Stainless steel
Max Pressure Rating
3,300 PSI
3,300 PSI
Warranty
Graco limited warranty
30-day fit guarantee
Price
$109–$129
$89.95
Ships same day
For most contractors, the OEM-compatible version performs identically and saves 20–40%. We only source aftermarket components that meet or exceed Graco's original specifications.
5. Installation Guide
Safety first: Always fully depressurise the sprayer before beginning any repair. Airless sprayers operate at up to 3,300 PSI. Trigger the gun to release all pressure, engage the trigger lock, and disconnect power before disassembly.
1
Depressurise & Flush
Turn prime/spray valve to PRIME. Trigger gun to release pressure. Turn off, engage lock, disconnect power. Flush pump with compatible solvent until clean, then drain completely.
⏱ ~8 min
2
Remove the Pump Assembly
Remove the two housing bolts with a 3/4" wrench. Pull the displacement rod straight out — avoid bending. Place on a clean surface.
⏱ ~5 min
3
Replace Inlet & Outlet Valves
Unscrew outlet valve seat (counterclockwise). Remove old ball and spring. Install new outlet valve assembly from kit — torque to 50 ft-lbs. Repeat for inlet valve.
⏱ ~10 min
4
Replace Packings & Throat Seal
Using packing wrench (218203), remove old packings. Install lower leather packing first, then upper PTFE packings flat-side up. Install new throat seal. Add TSL to throat area.
⏱ ~12 min
5
Replace O-Rings
Clean all o-ring grooves with a solvent rag. Lightly lubricate new o-rings with TSL before installing. Ensure each ring seats fully in its groove without twisting.
⏱ ~5 min
6
Reassemble & Test
Reinstall pump rod. Tighten housing bolts to 18 ft-lbs. Prime at minimum pressure — full pressure should return within 2–3 strokes. Perform 15-second cycling test to confirm repair.
⏱ ~5 min
Order the Graco 246381 Kit Today
In stock at $89.95. Ships same day. 30-day fit guarantee. Free shipping on orders over $99.
The 246381 kit fits the Graco 390 PC, 390 Hi-Boy, 390 Stand, 395 PC, 490 PC, and 495 PC. Call us at 713-931-4102 with your serial number if you need confirmation for your specific unit.
Upper PTFE packings (×2), lower leather packing (×1), throat seal (×1), outlet valve assembly (×1), inlet valve assembly (×1), full o-ring set (×8), piston rod seal (×1), and illustrated installation instructions. Everything for a complete rebuild is included — no additional parts needed.
We stock both the genuine Graco OEM kit and a premium OEM-compatible aftermarket version. The aftermarket version uses identical PTFE packings and stainless steel valve components and saves up to 40% vs the OEM price. Both come with a fit guarantee.
For a first-timer, expect 60–75 minutes. For an experienced contractor who has done this before, 30–40 minutes is typical. Our technicians are available at 713-931-4102 to walk you through the installation free of charge.
If pressure loss persists after a correct rebuild, the most likely causes are a scored displacement rod (run your fingernail down the rod — grooves mean replacement needed), a failed pressure control transducer, or motor brush wear. Call us and we'll diagnose it over the phone.
Pro tip: When buying a pump repair kit, match the kit to your model number — not just the part number on the box. Graco releases updated kits that supersede older numbers.
