Troubleshooting

WARNING

SKIN 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

CAUSE

SOLUTION

 

 

 

Gas engine doesn’t work properly.

 

Consult engine manual, supplied.

 

 

 

Gas engine will not start.

 

Check battery.

 

 

 

Gas engine operates, but

Hydraulic motor stalled.

Turn the ignition key to OFF. Firmly press

displacement pump doesn’t

 

straight down on motor reset button. Restart

operate.

 

sprayer, see page 10. If it doesn’t start, see

 

 

manual 307158.

 

Pressure setting too low.

Increase pressure. See page 11.

 

Displacement pump outlet filter (if

Clean the filter.

 

used) is dirty or clogged.

 

 

Tip or tip filter (if used) is clogged.

Remove tip and/or filter and clean.

 

Hydraulic fluid too low.

Shut off sprayer and add fluid immediately*. See

 

 

page 5.

 

Hydraulic pump worn or damaged.

Return sprayer for repair.

 

Hydraulic motor worn or damaged.

Return sprayer for repair.

 

Displacement pump rod seized by

Service pump. See manual 311762.

 

dried paint.

 

 

 

 

Displacement pump operates, but

Piston ball check not seating properly.

Service piston ball check. See manual 311762.

output is low on upstroke.

Piston packings worn or damaged.

Replace packings. See manual 311762.

 

 

 

 

Displacement pump operates but

Piston packings worn or damaged.

Replace packings. See manual 311762.

output is low on downstroke and/

Intake valve ball check not seating

Service intake valve ball check. See manual

or on both strokes.

properly.

311762.

 

 

 

 

Paint leaks into wetcup

Loose wet–cup

Tighten just enough to stop leakage.

 

Throat packings worn or damaged.

Replace packings. See manual 311762.

 

 

 

Excessive leakage around

Piston rod seal worn or damaged.

Replace these parts. See manual 307158.

hydraulic motor piston rod wiper.

 

 

 

 

 

Fluid delivery is low.

Pressure setting too low.

Increase pressure. See page 11.

 

Displacement pump outlet filter (if

Clean filter

 

used) is dirty or clogged.

 

 

Hydraulic pump is worn or damaged.

Return sprayer for repair.

 

Hydraulic motor is worn or damaged.

Return sprayer for repair.

 

Large pressure drop in fluid hose.

Use larger diameter hose.

 

 

 

The sprayer overheats.

Cooler or blower is worn or damaged.

Replace. See page 15.

 

 

 

Spitting from gun.

Air in fluid pump or hose.

Check for loose connections on siphon

 

 

assembly, tighten, then reprime pump.

 

Fluid supply is low or empty.

Refill supply container.

 

 

 

*Check hydraulic fluid level often. Do not allow it to become too low. Use only Graco approved hydraulic fluid. See pages 5 and 20.

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Graco Inc 231733, 230975, GH 733 important safety instructions Troubleshooting, Problem Cause Solution

230975, 231733, GH 733 specifications

Graco Inc. is widely recognized for its innovative fluid handling products and diverse range of equipment designed for various applications. Among its product lineup, the Graco GH 733 is a standout piece of machinery, particularly known for its performance in high-demand environments. The model number 231733 refers to a specific configuration of the GH 733, and 230975 points to another variant, showcasing Graco's commitment to customization and versatility in their offerings.

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