Graco Inc 308972 manual Troubleshooting, Problem

Page 13

Troubleshooting

WARNING

INJECTION HAZARD

To reduce the risk of serious injury, whenever you are instructed to relieve pressure, follow the Pressure Relief Procedure on page 10.

Check everything in the troubleshooting chart before disassembling the sprayer.

PROBLEM

Gas engine doesn't work properly.

Gas engine will not start.

Gas engine operates, but displacement pump doesn't operate.

Displacement pump operates, but output is low on upstroke.

Displacement pump operates but output is low on downstroke and/ or on both strokes.

Paint leaks into wetcup.

Excessive leakage around hydraulic motor piston rod wiper.

Fluid delivery is low.

The sprayer overheats.

Spitting from gun.

CAUSE

Hydraulic motor stalled.

Pressure setting too low.

Displacement pump outlet filter (if used) is dirty or clogged.

Tip or tip filter (if used) is clogged.

Hydraulic fluid too low.

Hydraulic pump worn or damaged.

Hydraulic motor worn or damaged.

Displacement pump rod seized by dried paint.

Piston ball check not seating properly.

Piston packings worn or damaged.

Piston packings worn or damaged.

Intake valve ball check not seating properly.

Loose wet±cup.

Throat packings worn or damaged.

Piston rod seal worn or damaged.

Pressure setting too low.

Displacement pump outlet filter (if used) is dirty or clogged.

Hydraulic pump is worn or damaged.

Hydraulic motor is worn or damaged.

Large pressure drop in fluid hose.

Cooler or blower is worn or damaged.

Air in fluid pump or hose.

Fluid supply is low or empty.

SOLUTION

Consult engine manual, supplied.

Check battery.

Turn the ignition key to OFF. Firmly press straight down on motor reset button. Restart sprayer, see page 10. If it doesn't start, see manual 307158.

Increase pressure. See page 11.

Clean the filter.

Remove tip and/or filter and clean.

Shut off sprayer and add fluid immediately*. See page 5.

Return sprayer for repair.

Return sprayer for repair.

Service pump. See pump manual.

Service piston ball check. See pump manual.

Replace packings. See pump manual.

Replace packings. See pump manual.

Service intake valve ball check. See pump manual.

Tighten just enough to stop leakage.

Replace packings. See pump manual.

Replace these parts. See manual 307158.

Increase pressure. See page 11.

Clean filter.

Return sprayer for repair.

Return sprayer for repair.

Use larger diameter hose.

Replace. See page 15.

Check for loose connections on siphon assembly, tighten, then reprime pump.

Refill supply container.

*Check hydraulic fluid level often. Do not allow it to become too low. Use only Graco approved hydraulic fluid. See pages 6 and 27.

308972 13

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Contents This manual contains important warnings and information 308972Read and Keep for Reference ModelSymbols Table of ContentsInjection Hazard Fire Skin Injection Explosion Hazard Fire and Explosion HazardComponent Identification SetupConnect the Hose and Gun Check the Hydraulic Oil Level Grade of OIL ChartCheck the Engine Oil Level Fire and Explosion Hazard GroundingHow to Flush When to FlushFlushing Startup after storageFlushing Operation Pressure Relief ProcedurePrepare the Fluid Starting the SprayerAdjusting the Intake Valve Ball Travel Cleaning a Clogged TipPrime the Pump Maintenance Problem Troubleshooting7876A 108 B Dimension a 0.05º Mm ±0.254210±208 Displacement Pump Disconnect the Displacement Pump Displacement Pump ServiceReconnecting 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 Accessories Technical DataGraco Phone Number GRACO±APPROVED Hydraulic FluidAdditional Warranty Coverage Graco WarrantyFor Graco Canada Customers

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.

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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.