Graco Inc.

GMAX II 3900  Gas-Mechanical Airless Sprayer

Ideal for the professional contractor who sprays a wide variety of coatings

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With a 120 cc Honda engine and additional features for increased productivity, the GMAX II 3900 can handle up to two guns and is ideal for the professional contractor who sprays a wide variety of coatings.

GMax II 3900 Standard Series

The Standard Series sprayers come with these "Only On A Graco" features:

  • Advantage Drive System Runs quiet and has a lifetime guarantee.
  • SmartControl 3.0 Pressure Control – Delivers consistent spray fan without pressure fluctuations at all spraying pressures.
  • Endurance Pump – Amazingly durable design lasts twice as long as the next leading brand.
  • Honda Engine – Delivers maximum performance and contractor preferred reliability.
  • Rugged Cart Design – Chrome over steel makes this durable cart last for years.
  • Easy Out Pump Filter – Less mess when changing or cleaning the filter.
  • Heavy-Duty Prime Valve – Maintenance-free design withstands high pressure dumping.

GMax II 3900 ProContractor Series

The ProContractor Series sprayer has all the features of the Standard Series, plus:

  • QuikReel – Deploy and rewind up to 300 feet of hose in seconds without twists, kinks or coils.
  • Ready To Spray – A total of 100 feet of hose and gun already installed.
  • ProConnect 2 – Change out the pump using no tools in seconds resulting in quickly getting back to work.
  • LED Display – Bright easy-to-read LED display shows pressure readout, job/lifetime/ gallon counter and self diagnostics.
  • WatchDog – Save the pump from damage when paint runs out or a hose breaks.
  • On-Board Toolbox – End frustration and save time by never again searching for tips, filters, and tools.

GMax II 3900 Lo-Boy


Also available in Lo-Boy configuration with same features as Standard Series plus ProConnect 2 Pump System.
The Lo-boy configuration is not available in Europe, Middle East and Africa.

Standard Series and Lo-Boy units include:

  • Contractor Gun
  • RAC X 517 SwitchTip and Guard
  • 1/4 in x 50 ft (6.4 mm x 15 m) BlueMax II Airless Hose

ProContractor Series unit includes:

  • Contractor Gun
  • RAC X 517 SwitchTip and Guard
  • 2 each – 1/4 in x 50 ft (6.4 mm x 15 m) BlueMax II Airless Hose

Manuals



GMAX II 3900 Airless Sprayers
U.S.
Metric
Engine
Honda GX120 Engine
ANSI Power Rating @ 3600 rpm
4.0 Horsepower
3.0 kW
Sprayer
Maximum Working Pressure
3300 psi
228 bar, 22.8 MPa
Maximum Delivery Rating
1.25 gpm
4.73 lpm
Inlet Paint Strainer
8 mesh (2589 micron) stainless steel screen, reusable
8 mesh (2589 micron) stainless steel screen, reusable
Outlet Paint Filter
60 mesh (250 micron) stainless steel screen, reusable
60 mesh (250 micron) stainless steel screen, reusable
Pump Inlet Size
1-5/16-12 UN-2A
1-5/16-12 UN-2A
Fluid Outlet Size
1/4 npsm from fluid filter
1/4 npsm from fluid filter
Maximum Tip Size
1 Gun with 0.036 in. tip
1 Gun with 0.036 in. tip
2 Guns with 0.023 in. tip
2 Guns with 0.023 in. tip
2 Guns with 0.023 in. tip
3 Guns with 0.018 in. tip
3 Guns with 0.018 in. tip
3 Guns with 0.018 in. tip
Wetted parts
zinc- and nickel-plated carbon steel, PTFE, nylon, polyurethane, UHMW, fluoroelastomer, acetal, leather, aluminum, tungsten carbide, stainless steel, chrome plating
zinc- and nickel-plated carbon steel, PTFE, nylon, polyurethane, UHMW, fluoroelastomer, acetal, leather, aluminum, tungsten carbide, stainless steel, chrome plating
Dimensions
Weight:
GMAX 3900 Standard
106 lb
48.2 kg
GMAX 3900 Lo-Boy
123 lb
55.9 kg
GMAX 3900 ProContractor
133 lb
60.5 kg
GMAX 3900 Rental Pro 360G
106 lb
48.2 kg
Height (handle extended):
GMAX 3900 Standard
40.8 in
103.6 cm
GMAX 3900 Lo-Boy
26.4 in.
67.1 cm
GMAX 3900 ProContractor
38.3 in.
97.3 cm
GMAX 3900 Rental Pro 360G
40.8 in.
103.6 cm
Length (handle extended):
GMAX 3900 Standard
38.3 in.
97.3 cm
GMAX 3900 Lo-Boy
46.9 in.
119.1 cm
GMAX 3900 ProContractor
32.3 in.
82.0 cm
GMAX 3900 Rental Pro 360G
38.3 in.
97.3 cm
Width:
GMAX 3900 Standard
22.3 in.
56.6 cm
GMAX 3900 Lo-Boy
24.4 in.
62.0 cm
GMAX 3900 ProContractor
22.3 in.
56.6 cm
GMAX 3900 Rental Pro 360G
22.3 in.
56.6 cm
Noise Level:
Sound Power
105 dBa per ISO 3744
105 dBa per ISO 3744
Sound Pressure
96 dBa measured at 3.1 ft
96 dBa measured at 1 m