Graco GMAX 3400 Lo-Boy Suction Set Kit Series Gas Airless Sprayer Parts

Graco GMAX 3400 is the smallest gas unit in Graco’s contractor lineup, yet it muscles through block-fillers and full exterior repaints with a Honda 120 cc engine pumping 0.75 GPM at 3300 psi through RAC X tips.The Lo-Boy frame keeps weight low—just over 120 lb with fuel—so one tech can ramp it into a van without a liftgate, and the Suction Set Kit (p/n 24W028) slashes clean-up time by swapping the rigid siphon for a quick-drain hose and oversized inlet strainer.

Because downtime drains profit faster than overspray, crews who run graco paint sprayers rely on SprayersAndParts.com for factory-sealed graco sprayer parts.

Why Genuine Graco GMAX 3400 Suction Set Parts Beat Generic Copies

1. Exact Tolerances ±2 µm The Chromex-coated inlet seat and stainless ball are lapped as a matched pair, eliminating the “morning dribble” that ruins first-coat coverage.
2. Full-pressure Certification Every diaphragm gasket and hose barb passes 3300 psi hydro-burst testing; many gray-market kits burst below 2500 psi.
3. SmartControl™ Ready OEM sensors chat in real time with the dash display—generics can trigger “pressure error” codes that stall your day.
4. One-Ticket Warranty Buy from SprayersAndParts and you get Graco’s factory warranty.

Key Performance Specs for the GMAX 3400

• Max Flow: 0.75 GPM / 2.8 L min-¹—covers block walls in half the passes of an electric 395.
• Max Pressure: 3300 psi for high-solid elastomerics without thinning.
• Max Tip Size (1 gun): 0.027 in RAC X; smaller 0.019–0.021 tips recommended for fine-finish lacquers.
• Engine: Honda GX120, 3.5–4 hp, pull-start with low-oil shut-off.
• Recommended Duty Cycle: up to 250 gal per week—ideal for entry-level contractors needing gas power in a lightweight chassis.
• Lo-Boy Suction Kit: 24W028 hose + 248665 drain line + 15-mesh foot strainer for faster clean-outs.

Cross-Fit Parts: Support an Entire Fleet with One Shelf

Graco’s parts engineering philosophy means your graco airless paint sprayer parts inventory can rescue half a dozen rigs when somebody dry-fires a pump. The GMAX 3400 Lo-Boy suction kit shares hardware with these best-sellers:

Gas Workhorses

• GMAX II 3900 & 5900—identical ⅜-in BlueMax™ hose fittings and foot valves, so one suction kit covers three models.
• GMAX II 7900—bigger pump, same 24W0-series suction hose and drain cock threads for easy field service.

Electric Titans

• Ultra Max II 495 PC Pro—shares 60-mesh Easy-Out filters and RAC X tip guards, letting you back-up a gasser with a graco 495 paint sprayer on indoor jobs.
• Ultra 395 PC—identical ball seal kits and prime valves; handy when matching trim colours with a small electric.

Retail & DIY Units

• Project Painter Plus 257025—our bundle “Buy Graco Magnum Project Painter Plus 257025 Parts List” lets weekend warriors borrow RAC IV/V tips from the 3400 kit for punch-list patches.

Fine-Finish Crew Gear

• Graco fine finish guns such as the FTX-WITH™ HS Advantage and Edge II Plus share the same 7/8-in UNF tip guard and ¼-in air-assist swivel, so you can move between lacquer cabinets and exterior siding without chasing adapters.

Essential Graco Airless Sprayer Accessories for the 3400

• Graco airless spray guns—upgrade to the Contractor PC Compact for 50 % lighter trigger pull and a one-minute cartridge rebuild.
• Graco airless sprayer accessories—add a 50-ft, ¼-in whip hose to cut wrist torque on tall walls and cut-ins.
• Graco sprayer parts—MaxLife™ rod/sleeve kit doubles pump life in abrasive roof coats.
• Graco paint sprayer attachments—12-in tip extension keeps crews off ladders, meeting OSHA’s six-foot rule.

Pro-Level Maintenance Plan

Daily → Flush with FastFlush™ and log strokes. Five minutes saves a $300 valve job.

Every 50 hours → Re-grease the drive and inspect the suction hose for solvent swelling. Replace at first sign of “pregnancy”—hose blow-outs cost more than a new kit.

Every 500 gallons → Install OEM packing kit 18B260 and inlet seat 246429 (fits 3400 Hi-Boy and Lo-Boy).

Frequently Asked Questions

Does the Lo-Boy suction kit fit the Hi-Boy 3400?

Yes—thread sizes match; you’ll reroute the hose through the frame grommet and add the included drain-line clip.

What’s the biggest tip I can run on a single gun?

Graco rates the GMAX 3400 to a 0.027 in RAC X tip at 3300 psi. Stay under 0.021 in for glass-smooth enamel finishes.

Can I share filters with a graco 495 paint sprayer?

Absolutely—the 60-mesh Easy-Out core and gasket are identical, letting you stock one SKU for gas and electric rigs.

Do fine finish guns need a different suction set?

No—the gun side changes; the pump inlet and suction hose stay the same, so your graco fine finish guns bolt right up.

Boost Productivity—Order Your GMAX 3400 Suction Parts Now

Whether you’re grinding through 250 gallons a week on new builds or tackling weekend decks with a Project Painter Plus backup, genuine Graco GMAX 3400 Lo-Boy Suction Set Kit parts keep pressure steady, tips spraying and profits flowing. Drop the kit in your cart, choose express checkout and feel the SprayersAndParts difference on tomorrow’s jobsite.

Get authentic Graco GMAX 3400 Lo-Boy Suction Set Kit Series Gas Airless Sprayer Parts—SprayersAndParts.