Service

Pressure Relief Procedure

WARNING

PRESSURIZED EQUIPMENT HAZARD

The system pressure must be manually relieved to prevent the system from starting or spraying acci- dentally. To reduce the risk of an injury from acci- dental spray from the gun, splashing fluid, or moving parts, follow the Pressure Relief Proce- dure whenever you:

Dare instructed to relieve the pressure,

Dstop spraying,

Dcheck or service any of the system equipment,

Dor install or clean the spray nozzle.

1.Shut off the air or hydraulic power supply to the pump.

2.Close the bleed-type master air valve (required in air-powered systems).

3.Hold a metal part of the gun firmly to the side of a grounded metal pail, and trigger the gun to relieve pressure.

4.Open the drain valve (required in your system), having a container ready to catch the drainage.

5.Leave the drain valve open until you are ready to spray again.

If you suspect that the spray nozzle or hose is com- pletely clogged, or that pressure has not been fully relieved after following the steps above, very slowly loosen the nozzle retaining ring or hose end coupling and relieve pressure gradually, then loosen completely. Now clear the nozzle or hose.

Piston and Intake Valve Adjustment

See Fig. 1. The fluid piston and intake check valves are factory-set for pumping medium viscosity fluids. The ball stop pin (18) in the intake valve is in the lowest set of holes. The piston ball travel is set at 0.204 in. (5.2 mm), measured from the end of the adjustable plunger rod (23) to the top of the ball (22). This distance represents four complete turns of the rod

(23)from the top of the ball.

4 307983

1.If you are pumping heavy viscosity fluid and erratic pump operation develops, disassemble the pump as explained on page 5. To increase the ball travel in the intake valve, move the pin (18) to the center or upper set of holes. To increase the ball travel in the piston valve, place the piston in a vise, loosen the upper cap (27) to relieve tension on the plunger rod (23), and turn the plunger rod counterclockwise two complete turns beyond its factory-set position, or enough to set the total ball travel to 0.306 in. (7.8 mm).

2.If you are pumping lighter viscosity fluid and surging develops, disassemble the pump as explained on page 5. To decrease the ball travel in the intake valve, place the pin (18) in the lowest set of holes. To decrease the ball travel in the piston valve, place the piston in a vise, loosen the upper cap (27) to relieve tension on the plunger rod (23), and turn the plunger rod clockwise two complete turns beyond its factory-set position, or enough to set the total ball travel to 0.102 in. (2.6 mm).

27

23

Ball Travel

22

Piston Valve

18

16

Ball Travel

15

 

 

 

Intake Valve

06081

Fig. 1

 

 

 

 

 

Page 3 Page 5
Page 4
Image 4
Graco Series D, 223177 important safety instructions Service, Pressure Relief Procedure, Piston and Intake Valve Adjustment
Page 3 Page 5

223177, Series D specifications

Graco 223177, Series D is a high-performance spray gun designed for professional-grade painting and finishing applications. This versatile tool is valued for its precision, efficiency, and user-friendly features, making it a favorite among contractors, painters, and DIY enthusiasts alike.

One of the standout features of the Graco 223177 is its innovative Airless technology. This technology eliminates the need for compressed air, allowing for a smooth and even spray pattern. This results in a finer finish with fewer overspray issues, saving time during cleanup and minimizing paint waste. The Airless system also ensures that the paint is atomized effectively, providing a flawless application that reduces the need for multiple coats.

The gun offers adjustable pressure control, enabling users to tailor the spray output according to specific project requirements. This feature is particularly beneficial when working with different materials, as it allows for precise control over the thickness of the paint being applied. The Graco 223177 can handle a wide range of coatings, including latex, oil-based paints, and stains, offering versatility for various applications.

The ergonomic design of the Graco 223177 enhances user comfort during extended use. It is lightweight and features a comfortable grip, reducing hand fatigue. The design also includes an integrated filter that prevents clogs, ensuring consistent performance without interruptions. Additionally, the gun's easy-to-clean components streamline maintenance, allowing users to quickly prepare for their next task.

Another notable characteristic of the Graco 223177 is its durability. Built with high-quality materials, this spray gun is designed to withstand the rigors of daily use while maintaining its performance standards. It is compatible with a range of spray tips, offering flexibility in terms of spray patterns and widths, catering to the needs of different projects—from large surfaces to intricate details.

In conclusion, the Graco 223177, Series D stands out for its advanced Airless technology, adjustable pressure control, ergonomic design, and durability. These features make it an ideal choice for professionals seeking efficiency and quality in their painting tasks, as well as for homeowners looking to achieve a professional finish. With its broad capabilities, the Graco 223177 is a reliable tool that enhances productivity and delivers excellent results across various painting applications.
Top Page Image Contents