Maintenance

Preventive Maintenance

Schedule

The operating conditions of your particular system determine how often maintenance is required. Establish a preventive maintenance schedule by recording when and what kind of maintenance is needed, and then determine a regular schedule for checking your system. Your maintenance schedule should include the follow- ing:

Flushing

• Flush before shutting down the system for an extended period of time.

•Flush before repairing the pump, if possible.

•Flush before fluid can dry out, settle, or set up in the equipment.

Air Line Filter

Drain and clean as necessary.

Hydraulic Power Supply Check

Carefully follow the hydraulic power supply manufac- turer's recommendations on reservoir and filter cleaning, and periodic changes of hydraulic fluid.

Mix Tank Volume

Don't let the mix tank run dry. When the tank is empty, the pump demands more power as it tries to suck in some fluid. This causes the pump to run too fast, which can seriously damage the pump.

Packing Nut Tightness

Check the packing nut (21) tightness every few days at startup and then weekly throughout the life of the throat seal. The packing nut should be tight enough to stop leakage, but no tighter. See FIG. 4.

To check the adjustment of the packing nut, stop the pump and relieve fluid pressure. Loosen the packing nut until it turns freely. Tighten the nut firmly and then turn the nut another 1/4 turn. If you have a torque wrench, tighten the packing nut to 30 ft-lb (40 N•m), then back off and re-tighten to 15-20 ft-lb (20-27 N•m).

Maintenance

Excessive Leaking at Throat

If you see excessive leaking at the throat, tighten the packing nut (21), see FIG. 4. If this does not fix the prob- lem, replace the throat packings, piston rod, or both See manual 311690.

NXT Air-Powered

Pump Shown

1packing nut

1 Torque to 15-20 ft-lb (20-27 N•m).

TI8354a

FIG. 4

311211L

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Graco 311211L important safety instructions Preventive Maintenance Schedule
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311211L specifications

The Graco 311211L is a highly versatile airless paint sprayer designed for both professional contractors and DIY enthusiasts. This powerful machine stands out in the market due to its robust construction, exceptional performance, and innovative features that enhance the painting experience.

One of the main features of the Graco 311211L is its high-efficiency piston pump, which is capable of delivering a pressure of up to 3300 PSI. This allows users to spray thicker materials without compromising on the quality of the finish. The machine's pump is designed to handle a variety of coatings, including paints, stains, and sealers, making it suitable for a wide range of applications.

Another key characteristic of the Graco 311211L is its ability to support a broad range of hose lengths, accommodating up to 150 feet. This flexibility is particularly beneficial for large projects, as it provides users the freedom to move around without the constraints of a short hose. The airless design ensures a smooth and even application, reducing the need for back-and-forth brushing, saving time and effort.

The machine is also equipped with a convenient QuickChange tip system that allows users to interchange spray tips with ease. This feature promotes efficiency, as users can quickly switch between different spray patterns and widths to achieve the desired finish. Additionally, the Graco 311211L boasts a built-in pressure control that enables you to adjust the spray pressure according to the job requirements, ensuring optimal performance and consistency.

User comfort and convenience are further enhanced through its ergonomic design, which includes a lightweight construction and a well-balanced frame. This makes it easy to maneuver during extended use. Furthermore, it offers an integrated storage compartment for accessories, keeping everything organized and easily accessible.

In summary, the Graco 311211L airless paint sprayer combines performance, efficiency, and user-friendly features, making it an excellent choice for both professionals and DIY enthusiasts. Its adaptability to various coatings and surfaces, coupled with advanced technologies, makes it a standout option in the competitive paint sprayer market. Whether for interior or exterior projects, the Graco 311211L promises to deliver a high-quality finish with minimal effort.
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