Graco Inc 308972 Prime the Pump, Cleaning a Clogged Tip, Adjusting the Intake Valve Ball Travel

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Operation

If the motor stalls during operation, turn OFF the igni- tion key. With your hand, firmly press straight down on the motor reset button. Now try to restart the sprayer. If it will not start, refer to the separate motor manual, 307158.

CAUTION

Never use a hammer to depress the reset button, as it could cause serious internal motor damage.

4.Prime the Pump

a.Be sure the gun safety latch is engaged.

b.Don't install the spray tip yet!

c.If the engine has not been started, follow the procedure in Step 2., page 10.

d.Disengage the gun safety latch.

e.Point the gun into a grounded metal pail and hold a metal part of the gun firmly against the pail. See the WARNING below.

f.Squeeze the trigger and slowly turn the pres- sure control knob clockwise just enough to start the pump. See Fig 6.

g.Operate the pump until all air is purged from the pump and hoses and the fluid is flowing freely from the gun.

h.Release the trigger and engage the safety latch.

i.Turn the pressure control knob counterclock- wise until all spring tension is relieved. You will be able to feel it. The sprayer is now at the lowest pressure setting. Turning the knob further will remove it.

j.Follow the Pressure Relief Procedure on page 10. Then install the spray tip in the gun as instructed in the separate gun or tip instruc- tion manual. If you are using the RAC IV supplied with this sprayer, see manual 308644.

5.Adjusting the Pressure

a.Turn the pressure control knob clockwise to increase and counterclockwise to decrease the pressure. Tighten the knob locknut to set.

b.Always use the lowest pressure that is neces- sary to completely atomize the fluid.

CAUTION

Operating the sprayer at a higher pressure than necessary wastes fluid, causes early tip wear, and shortens the sprayer life.

c.If more coverage is needed, use a larger tip rather than increasing the pressure.

d.Check the spray pattern. The tip size and angle determines the pattern width and flow rate. See the separate manual received with your gun.

CAUTION

The engine throttle has been set and locked at 3000 RPM. The sprayer warranty will be voided and the hydraulic pump life shortened if this adjustment is changed.

6.Cleaning a Clogged Tip

WARNING

INJECTION HAZARD

To reduce the risk of a fluid injection injury, NEVER hold your hand, body or a rag in front of the spray tip when

cleaning or checking for a cleared tip. To reduce the risk of a fire or explosion, always hold the gun firmly against the side of a grounded metal waste container when checking to see if the tip was cleared or when using a self±clearing tip.

a.Follow the Pressure Relief Procedure Warning on page 10.

b.Clean the front of the tip frequently during the day to keep the fluid from building up and clog- ging the tip. To clean, and to clear a tip if it clogs, refer to your separate gun instruction manual. If you are using the RAC IV tip guard and SwitchTip, refer to manual 308644.

7.Shutting Off the Sprayer

a.Whenever you stop spraying, even for a short break, follow the Pressure Relief Procedure Warning on page 10.

b.Clean the tip and gun as recommended in your separate gun or tip manual.

c.Flush the sprayer at the end of each work day if using water±based fluid or if it could harden in the sprayer over night. See FLUSHING, page 8. Use a compatible solvent to flush, then fill the pump and hoses with solvent such as mineral spirits to help prevent pump corro- sion. Relieve pressure!

d.For long term shutdown or storage, always fill the sprayer with mineral spirits to prevent pump corrosion. Relieve pressure!

8.Adjusting the Intake Valve Ball Travel.

a.The pump is set to handle medium volume, low viscosity fluid. To adjust the pump for higher flow or heavier viscosity fluid, disas- semble the intake valve as instructed in the appropriate pump manual listed in the parts list and move the ball stop pin to a higher set of holes. This increases the ball travel.

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Contents Model 308972This manual contains important warnings and information Read and Keep for ReferenceSymbols Table of ContentsInjection Hazard Fire Skin Injection Explosion Hazard Fire and Explosion HazardConnect the Hose and Gun SetupComponent Identification Check the Engine Oil Level Grade of OIL ChartCheck the Hydraulic Oil Level Fire and Explosion Hazard GroundingStartup after storage When to FlushHow to Flush FlushingFlushing Starting the Sprayer Pressure Relief ProcedureOperation Prepare the FluidPrime the Pump Cleaning a Clogged TipAdjusting the Intake Valve Ball Travel Maintenance Problem Troubleshooting7876A 108 B Dimension a 0.05º Mm ±0.254Reconnecting the Displacement Pump Displacement Pump Service210±208 Displacement Pump Disconnect the Displacement Pump Relieve the pressure GH5030 Roof Rig Parts Drawing GH3640 Roof Rig Parts Drawing GH2560 Roof Rig Parts Drawing GH2075 Roof Rig Parts Drawing GH1015 Roof Rig Parts Drawing Models 687100, 687327 965171 965165 Roof Rigs Sprayer Parts Drawing7879A Description QTY Roof Rigs Parts ListPage GRACO±APPROVED Hydraulic Fluid Technical DataAccessories Graco Phone NumberFor Graco Canada Customers Graco WarrantyAdditional Warranty Coverage

308972 specifications

Graco Inc 308972 is a highly regarded product in the realm of fluid management systems, specifically designed for professionals who require efficient and reliable performance in their applications. This model is particularly popular among those in industries such as painting, automotive, and manufacturing, where precision and durability are critical.

One of the standout features of the Graco Inc 308972 is its advanced pump technology. This model is equipped with a robust pneumatic pump system that ensures consistent fluid delivery, minimizing the risk of uneven application. The pump's design allows it to handle a wide range of fluids, from water-based materials to viscous coatings, making it versatile for various tasks.

Another key characteristic of the Graco Inc 308972 is its user-friendly interface. The equipment is designed with ease of operation in mind, featuring simple controls that allow users to adjust settings on-the-fly. This is particularly beneficial in fast-paced environments where quick adjustments may be necessary to maintain productivity.

In terms of build quality, Graco is known for using high-grade materials that enhance the longevity of their products. The 308972 model is constructed to withstand the rigors of daily use, featuring corrosion-resistant components that extend its lifespan even in challenging conditions. This durability reduces the need for frequent replacements and repairs, providing excellent value for users.

The Graco Inc 308972 also boasts impressive safety features. It includes built-in pressure relief mechanisms that prevent over-pressurization, reducing the risk of accidents during operation. The model prioritizes user safety, ensuring that operators can work with confidence.

Moreover, the model is designed for easy maintenance. Regular upkeep is simplified by easily accessible components, allowing users to perform routine checks without extensive disassembly. This design consideration enhances the overall efficiency of operations, as downtime for maintenance is minimized.

Overall, the Graco Inc 308972 is a reliable and versatile solution for fluid management. With its advanced technology, user-friendly design, durability, and safety features, it stands out as an essential tool for professionals across various industries seeking efficiency and precision in their work. Whether for large industrial applications or smaller, detailed jobs, this model delivers the performance needed to complete tasks effectively.
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