Troubleshooting

Troubleshooting

NOTE: Relieve the pressure (page 10) before checking or servicing the equipment.

NOTE: Relieve the pressure (page 10) before checking or servicing the equipment.

Problem

Cause

Solution

 

 

 

 

 

 

Pump cycles at stall or fails to hold

Worn check valve balls (26), seats

Replace. See page 20.

pressure at stall.

(31), or ball guides (32).

 

 

 

 

Pump will not cycle, or cycles once

Stuck or dirty air valve.

Disassemble and clean air valve.

and stops.

 

See page 16. Use filtered air.

 

 

 

 

Check valve ball (26) severely worn

Replace ball and seat. See page 20.

 

and wedged in seat (31).

 

 

 

 

 

Check valve ball (26) wedged in seat

Replace. See page 20. Do not

 

(31) due to overpressurization.

exceed the maximum fluid working

 

 

pressure, see page 24.

 

 

 

 

Clogged fluid dispensing valve.

Relieve pressure and clear valve.

 

 

 

 

Pinched hose line.

Check lines.

 

 

 

Pump operates erratically.

Clogged suction line.

Inspect; clear.

 

 

 

 

Sticky or leaking check valves.

Clean or replace balls (26) and seats

 

 

(31). See page 20.

 

 

 

 

Ruptured diaphragm (9).

Replace. See page 13.

 

 

 

 

Restricted exhaust.

Remove restriction.

 

 

 

Air bubbles in fluid.

Loose suction line.

Tighten.

 

 

 

 

Ruptured diaphragm (9).

Replace. See page 13.

 

 

 

Pump running irregularly. Stroke fre-

Worn parts.

Replace worn parts. Check com-

quency dropping, coming to stand-

 

pressed air supply.

still.

 

 

Icing caused by: compressed air too

Remove ice by changing operating

 

 

moist, stroke frequency too high,

conditions.

 

local temperature too low.

 

 

 

 

Air escapes continually.

Damaged air valve cup (15) or seat.

Replace damaged parts. See page

 

 

16.

 

 

 

 

Foreign matter inside pump.

Check air filter.

 

 

 

Pump does not start, or pressure

Worn check valve seats.

Replace. See page 20.

fluctuates.

 

 

Inlet strainer blocked, maximum suc-

Clean strainer. Replace defective

 

 

tion exceeded, hose or seal defec-

parts.

 

tive.

 

 

 

 

 

Contaminated fluid. Pump installed or

Check fluid supply. Follow installation

 

operated incorrectly.

and operation instructions in this

 

 

manual.

 

 

 

12

311688L

Page 11 Page 13
Page 12
Image 12
Graco 311688L important safety instructions Troubleshooting, Problem Cause Solution
Page 11 Page 13

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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