Operation

Operation

Pressure Relief Procedure

Read the warnings on page 3, and follow the Pres- sure Relief procedure below whenever you:

•are instructed to relieve pressure

•stop spraying

•check or service any of the equipment

•install or clean the fluid nozzle.

1.Shut off the air to the pump.

2.Open the dispensing valve, if used.

3.Open the fluid drain valve to relieve all fluid pres- sure, having a container ready to catch the drainage.

Flushing the Pump Before First Use

The pump was tested in oil. If oil could contaminate the fluid you are pumping, flush the pump thoroughly with a compatible flushing fluid. Follow the steps under Start- ing and Adjusting the Pump.

Starting and Adjusting the Pump

1.Be sure the pump is properly grounded. Refer to Grounding on page 9.

2.Check all fittings to be sure they are tight. Be sure to use a compatible liquid thread sealant on all male threads. Re-torque diaphragm cover bolts (38, 39) before start-up.

3.Place the suction tube (L) in the fluid to be pumped.

4.Place the end of the fluid hose (P), see FIG. 2, into an appropriate container.

5.Close the fluid drain valve (J).

6.With the pump air regulator (F) closed, open the bleed-type master air valve (B).

7.If the fluid hose has a dispensing device, hold it open while continuing with the following step.

8.Slowly open the air regulator (F) until the pump starts to cycle. Allow the pump to cycle slowly until all air is pushed out of the lines and the pump is primed.

If you are flushing, run the pump long enough to thor- oughly clean the pump and hoses. Close the air regula- tor. Remove the suction tube (L) from compatible flushing fluid and place it in the fluid to be pumped.

NOTE: Operating the pump dry for extended periods or operating at pressures higher than the recommended maximum input air pressure will reduce diaphragm life.

Pump Shutdown

Short Term Shutdown

For a short term shutdown, relieve the pressure (see procedure on this page).

Long Term Shutdown

For a long term shutdown, such as several hours or overnight:

1.Flush the pump thoroughly.

2.Leave compatible flushing fluid in the pump.

3.Relieve the pressure (see procedure on this page).

10

311688L

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Graco 311688L Operation, Pressure Relief Procedure, Flushing the Pump Before First Use, Starting and Adjusting the Pump
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311688L specifications

The Graco 311688L is a high-performance airless paint sprayer, designed for both professional contractors and DIY enthusiasts looking to achieve a flawless finish on their projects. Engineered for reliability and efficiency, the Graco 311688L stands out in the competitive market of paint sprayers, offering a range of features that cater to various painting tasks.

One of the key features of the Graco 311688L is its powerful motor, which delivers consistent pressure to ensure an even and smooth application of paint. The unit is designed to handle a variety of coatings, including unthinned paints, stains, and sealers, making it versatile enough for numerous projects, from indoor walls to outdoor fences. The sprayer can cover large areas quickly, reducing the amount of time needed to complete a job.

Equipped with Graco's ProXChange technology, the Graco 311688L allows for easy replacement of the pump without the need for tools, minimizing downtime during projects. This feature is especially beneficial for professionals who need to maintain efficiency on job sites. The sprayer also includes the Graco SmartControl technology, which provides a consistent spray pattern regardless of the selected pressure. This technological advancement aids in achieving optimal results while allowing users to adjust the spray patterns according to their needs.

In terms of ergonomics, the Graco 311688L is designed with user comfort in mind. The lightweight design and integrated handle make it easily portable, while the adjustable spray tip enables users to customize the size and shape of the spray fan for precision work. Additionally, the unit features a built-in suction tube that allows for painting directly from a paint bucket, reducing mess and increasing convenience.

Safety has not been overlooked in the Graco 311688L design. It features a pressure relief valve that ensures safe operation, preventing unwanted discharge of paint when the motor is turned off. The unit also comes with a durable construction that enhances its longevity, making it a worthwhile investment for anyone serious about painting.

To sum it up, the Graco 311688L offers a blend of power, efficiency, and user-friendly features that make it an excellent choice for various painting applications. Whether you're a seasoned professional or a weekend warrior, this airless paint sprayer provides the performance and reliability needed to tackle any paint job with confidence.
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