Complete Selection of Factory-Approved Graco GMAX II 3900 Pump Series (16X414)
Graco GMAX II 3900 sits at the sweet spot of Graco’s gas line: light enough for one-man loading, powerful enough to push 0.95 gpm at 3 300 psi through a 0.031″ tip. The secret is 16X414 Endurance™ Vortex MaxLife pump, a rotating Chromex rod lower that lasts up to three times longer than flat-stroke steel. When this pump—and graco hoses, guards and filters attached—finally wear, you need genuine parts fast. That’s where SprayersAndParts.com delivers: we stock our site with every factory screw, seat and O-ring.
Why Contractors Choose OEM 16X414 Parts Over Clone Kits
- Vortex Rotation distributes rod wear 360°, stretching repack intervals beyond 600 gal of elastomeric.
- MaxLife Carbide Seats shrug off silica-filled block filler that chips bargain stainless after 50 gal.
- Quick-Swap ProConnect 2 lets one tech change a seized lower in <60 s—no wrenches, no vise.
- SmartControl 3.0 Sync—capacitance in OEM hoses feeds live pressure; clones trigger false alarms in BlueLink dashboards.
- Full Graco Warranty— valid only on genuine parts through an authorised dealer like us.
Key Technical Specs at a Glance
| Attribute | Specification |
|---|---|
| Max Working Pressure | 3 300 psi / 227 bar |
| Max Flow Rate (16X414) | 0.95 gpm / 3.6 l min |
| Engine | Honda GX 160 5.0 hp (recoil) |
| Recommended Tip (1 gun) | 0.029–0.031″ RAC X LP or WideRAC |
| Fluid Inlet / Outlet | 1-5/16″ UN / 3/8″ NPSM (fits BlueMax II® hose) |
Cross-Compatible Rigs Protected by the Same Pump
- GMAX II 5900—identical rod and seat diameters; keep one spare for both models.
- TexSpray Mark IV HD—texture frame uses 16X414 for block filler and light mud.
- LineLazer IV/V FieldLazer™—stripers share seats, balls and 60-mesh Easy-Out filters.
- Ultra Max II 1095 Electric—BlueMax hoses and Contractor PC guns swap 1-for-1.
- Magnum Pro X7—low-pressure RAC X tips and guards thread in; see Magnum Pro X7 parts diagram for details.
Top-Moving 3900 Pump & Hose SKUs
- 16X414 Endurance™ Vortex Pump—complete lower with Chromex rod, V-Max packings, seats & balls installed.
- 17A578 MaxLife™ Repack Kit—refreshes seals and seats on site in ≃25 min.
- 240 797 BlueMax II 50-ft Hose—¼″ ID, 3 300 psi rated; pair with a 3-ft whip for wrist relief.
- 19Y354 Contractor PC Gun—adjustable trigger; consult graco gun repair kit article for 5-minute rebuilds.
- 17G180 RAC X LP 517 Graco Tip & Guard—spray 400 psi lower, save ≈18 % paint on EIFS façades.
- 24U579 FastFlush™ 2.0—rinses pump 50 % faster using half the water—critical on remote sites.
Field-Proven Maintenance Blueprint
- Warm Flush—110 °F water dissolves latex 30 % faster; safe for BlueMax liners.
- TSL™ Discipline—add 5 drops each break; dry cups score rods in a single shift.
- Color-Code Consumables—blue = gas rigs, red = electric, green = texture; new hires never grab wrong kit.
- Rotate Hose Ends Weekly—evens liner wear and maintains SmartControl capacitance.
- Track Hours—Sharpie pump hours on roll cage; repack at 500 h latex, 250 h block-filler.
Frequently Asked Questions
Will 16X414 fit my 2013 GMAX II 3900?
Yes—clutch and frame pattern unchanged since 2011; upgrade to ProConnect 2 door if running early Gen-1.
Which seat for solvent enamels?
Stick with MaxLife carbide; stainless seats pit after 150 gal xylene-based coatings.
Can I push a 0.035″ tip?
Single gun yes, keep hose ≤150 ft and pressure ≤3 200 psi. For three guns use 0.025–0.027″.
Ready to Swap in Power & Swap Out Downtime?
Add the 16X414 vortex pump, BlueMax hose and Contractor PC gun to your cart. SprayersAndParts ships —so you spray profit tomorrow.