Explore Our Full Line of Professional-Grade Graco GMAX7900 HD ProContractor Pump (17H835) Series Gas Airless Sprayer Parts
When downtime can cost hundreds per hour, pros running GMAX II 7900 HD ProContractor sprayers bolt in 17H835 Endurance™ Vortex MaxLife Pump. This drop-in lower packs patented rotating-rod technology, MaxLife carbide seats, and ProConnect™ 60-second swap capability—so your crew can change a seized pump before coffee goes cold.
Why Choose Genuine 17H835 Pump & HD Series Parts?
- Vortex Rotation = 3× Longer Rod Life—the rod spins 360° each stroke, distributing wear evenly.
- MaxLife Material Stack—tungsten-carbide and Chromex plating shrug off abrasives in drywall primers and block-fill elastomerics.
- SmartControl 3.0 Ready—pressure variance stays within ±1 %, eliminating “burps” on broad wall passes.
- Honda GX 6.5 HP Power—the GMAX chassis sips fuel yet pushes 3 GPM, 3 guns, or 500-ft hose runs without bogging.
- Lifetime Advantage Drive™ gears whisper along behind a spill-proof belt, warrantied for life.
Key Pump & Sprayer Specifications
| Attribute | Spec |
|---|---|
| Maximum Working Pressure | 3 300 psi / 227 bar |
| Flow Capacity (17H835) | 2.2 GPM @ 25 cps |
| Compatible Engine | Honda GX 6.5 HP recoil |
| Fluid Inlet | 1-5/16″ UN-2A |
| Fluid Outlet | 3/8″ NPSM (to graco suction hose) |
| Recommended Tip Size | Up to 0.045″ (1 gun) or 0.031″ (3 guns) |
| Materials of Construction | Stainless, Chromex, Carbide, UHMW-PE |
Compatible Sprayers & Texture Rigs
Graco 17H835 pump is factory-approved for multiple high-volume Graco frames, letting one spare protect an entire fleet:
- GMAX II 7900 HD ProContractor & IronMan—direct drop-in.
- TexSpray 7900 HD ProContractor—identical lower, ideal for graco drywall texture sprayer crews.
- Mark X HD 3-in-1 electric sprayer—shares 17H835 as its “big-mud” pump.
- LineLazer 3400 & 3900 stripers—ball/seat kits and graco 3400 parts cross-reference for lean inventory.
- Ultra Max II 695 Hi-Boy—packings and seat diameters match, so filter bags and graco 395 sprayer parts move between rigs without confusion.
Top-Moving OEM Parts & Upgrades
- Endurance™ MaxLife Pump 17H835—complete lower with rod, packings, seat, ball & glands.
- 17A578 MaxLife Repair Kit—refresh seats & packings on site in under 25 minutes.
- BlueMax II 3/8″ x 100 ft Hose—rated 4 000 psi; pair with 1/4″ graco suction hose whip for wrist relief.
- Contractor PC Gun + RAC X Tip Guard—accepts all graco nozzles and tips up to 0.031″; adjustable trigger reduces fatigue.
- 24U579 FastFlush™ 2.0 Kit—cleans pump 4× faster using half the water by spinning the Vortex rod at low pressure.
- 60-Mesh Easy-Out Filter—the GMAX default; colour-coded black cap kills “which screen?” debates.
Pro Tips for Long-Term Reliability
- Colour-Code Consumables—blue bins for MaxLife kits, red for texture seats, yellow for graco drywall smoothing blades so nothing walks off to tile crews.
- Log Pump Hours—Sharpie the frame weekly; swap packings at 500 hrs or sooner if spraying sand-filled acrylics.
- Flush Warm—110 °F water cuts latex 30 % faster; FastFlush mode spins the rod for extra turbulence.
- Store with Pump Armor™ to stop corrosion on Chromex rods in humid Gulf Coast rigs.
- Angle-Grind Tire Bolts—file tire bolt threads smooth so they never nick a hose reel loop on GMAX frames.
Frequently Asked Questions
Will 17H835 fit pre-2019 GMAX II 7900 frames?
Yes. Graco kept the clutch-pin geometry identical; just verify you have ProConnect 2 door latches and upgrade if running Gen-1 ProConnect.
Can I spray drywall mud through a GMAX 7900?
Absolutely. Pair the pump with graco drywall texture sprayer accessories—wide mouth suction tube and 0.047″ RAC X WideRAC tips—for up-to-70 cps mud. Flush immediately to protect packings.
What’s the max hose length?
500 ft total (3/8″ main + 1/4″ branch). Beyond that consider a remote hose whip pump or step up to a duty-cycle King pneumatic.
Can I use the pump in my electric Mark X?
Yes—the 17H835 is the factory replacement for Mark X HD 3-in-1, no adapters needed.
Ready to Hammer Out Bigger Jobs & Fewer Breakdowns?
Click Add to Cart to lock in OEM power. With 17H835 Vortex tech spinning in your GMAX7900, you’ll spray thicker coatings, pull longer hose runs, and wrap the site days ahead of schedule—all while keeping the accountant smiling.