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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15891

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 3900/5900/5900HD/7900
Honda GX 120 Engine ANSI Power Rating at 3600 rpm
4.0 Horsepower
3.0 kW
Honda GX 160 Engine ANSI Power Rating at 3600 rpm
5.5 Horsepower
4.1 kW
Honda GX 200 Engine ANSI Power Rating at 3600 rpm
6.5 Horsepower
4.8 kW
Maximum Working Pressure
3300 psi
228 bar, 22.8 MPa
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
3900 Maximum Delivery Rating
1.25 gpm
4.73 lpm
5900/5900HD Maximum Delivery Rating
1.60 gpm
6.06 lpm
7900 Maximum Delivery Rating
2.20 gpm
8.33 lpm
3900 Maximum tip size
2 guns with 0.023 in tip
2 guns with 0.023 in tip
5900/5900HD Maximum Tip Size
2 guns with 0.029 in tip
2 guns with 0.029 in tip
7900 Maximum Tip Size
2 guns with 0.035 in tip
2 guns with 0.035 in tip
Inlet Paint Strainer
12 mesh stainless steel screen, reusable
893 micron stainless steel screen, reusable
Outlet Paint Filter
60 mesh stainless steel screen, reusable
250 micron stainless steel screen, reusable
Pump Inlet Size
1–5/16–12 UN-2A
1–5/16–12 UN-2A
Fluid Outlet Size: 3900/5900
1/4 npsm from fluid filter
1/4 npsm from fluid filter
Fluid Outlet Size: 7900
3/8 npsm from fluid filter
3/8 npsm from fluid filter
Wetted Parts
zinc-plated carbon steel, PTFE, nylon, polyurethane, UHMW polyethylene, fluoroelastomer, acetal, leather, aluminum, tungsten carbide, nickel- and zinc-plated carbon steel, stainless steel, chrome plating
zinc-plated carbon steel, PTFE, nylon, polyurethane, UHMW polyethylene, fluoroelastomer, acetal, leather, aluminum, tungsten carbide, nickel- and zinc-plated carbon steel, stainless steel, chrome plating
3900 Weight
109 lb
50 kg
5900 Weight
139 lb
64 kg
7900 Weight
146 lb
67 kg
7900HD Weight
157 lb
71 kg
3900 Height
31.5 in
80.0 cm
5900 Height
32.25 in
81.9 cm
7900 Height
32.25 in
81.9 cm
7900HD Height
32.25 in
81.9 cm
3900 Width
22.25 in
56.5 cm
5900 Width
24.5 in
62.2 cm
7900 Width
24.5 in
62.2 cm
7900HD Width
24.5 in
62.2 cm
3900 Length
32.0
81.3
5900 Length
32.25
81.9
7900 Length
33.0
83.8
7900HD Length
33.0
83.8