Graco MAGNUM 232738 User Manual

Graco MAGNUM 232738

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Graco Inc. P.O. Box 1441 Minneapolis, MN 55440-1441

Copyright 2002, Graco Inc. is registered to I.S. EN ISO 9001

309477F

Repair

Airless Sprayer

US Patent 6,752,067

Europe Patent 1 208 287

- For portable spray applications of architectural paints and coatings -

(Specifications, page 3)

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Questions and Answers:

R
Robert LamAug 18, 2025
Why won't my Graco Paint Sprayer motor run even when it's plugged in?
- M
  Margaret GonzalezAug 19, 2025
  If your Graco Paint Sprayer's power switch is on, and it's plugged in, but the motor isn't running, first, check the pressure setting. Make sure the pressure control knob is not set at zero; turn it counterclockwise to increase the pressure. Also, verify that the electrical outlet is working by testing it with another device or trying a different outlet. Inspect the sprayer's electrical cord for any damage like broken insulation or wires, and replace the cord if necessary. A damaged extension cord can also be the cause, so try replacing it. If these steps don't resolve the issue, the motor control might be damaged, or the paint may be frozen in the pump.
M
Michael AdamsAug 21, 2025
How to fix a Graco MAGNUM 232738 that won't prime?
- B
  branchpamelaAug 21, 2025
  If your Graco Paint Sprayer pump isn't priming, ensure the Spray-PRIME valve is in the PRIME position (pointing down). Check the inlet screen for clogs and make sure the suction tube is fully immersed in the paint. Inspect the suction tube connection for leaks and tighten if necessary. Also, the balls in the check valve may be stuck, so you should clean or replace the check valves.
M
Michael FloydAug 23, 2025
What to do if my Graco Paint Sprayer pump cycles but doesn't build pressure?
- T
  Tammy WhiteAug 23, 2025
  If your Graco Paint Sprayer pump cycles but doesn't build up pressure, start by priming the pump. Also, check the inlet screen and suction tube. Clean any debris from the inlet screen and ensure the suction tube is fully immersed in the paint. Make sure that the paint pail is not empty, refill it if needed. Inspect the suction tube for leaks and tighten the connection if necessary. Lastly, examine the pump check valves for dirt or damage, and clean or replace them if needed. The Prime/Spray valve could also be obstructed or worn, so check it for debris and wear.
B
bhesterAug 26, 2025
What to do if my Graco MAGNUM 232738 Paint Sprayer dribbles instead of spraying?
- M
  Michelle AllenAug 26, 2025
  If your Graco Paint Sprayer pump cycles but paint only dribbles or spurts when the spray gun is triggered, first, increase the pressure by slowly turning the pressure control knob clockwise. If that doesn't work, the spray tip may be plugged and needs unplugging. Additionally, check the InstaClean fluid filter (XR9 models only) and the spray gun fluid filter for clogs; clean or replace them as needed.
M
Mark MccallAug 28, 2025
Why is my Graco MAGNUM 232738 leaving stripes or spraying inconsistently?
- M
  Michael MartinezAug 28, 2025
  If your Graco Paint Sprayer is producing an inconsistent spray pattern or leaving stripes, try increasing the pressure by turning the pressure control knob clockwise. If the issue persists, the spray tip may be worn and needs replacement.
W
William EllisAug 30, 2025
Why is paint leaking from the pump of my Graco MAGNUM 232738 Paint Sprayer?
- P
  Paula TranAug 30, 2025
  If paint is leaking down the outside of the pump of your Graco Paint Sprayer, the pump packings are likely worn and need to be replaced.
J
jennifer42Sep 1, 2025
Why is my Graco MAGNUM 232738 motor overheating and running intermittently?
- K
  kelly93Sep 1, 2025
  If your Graco Paint Sprayer motor is hot and runs intermittently, ensure that the vent holes in the enclosure are not blocked by obstructions or overspray, and keep the sprayer open to air. If you're using an extension cord, make sure it's not too long or of an insufficient gauge; replace it if necessary. If you are using an electrical generator, ensure it has a proper voltage regulator and meets the sprayer's requirements (220-240 VAC, 50/60 Hz, 1500-Watt). Also, avoid operating the sprayer at high pressure with a very small tip, as this can cause frequent motor starts and excessive heat buildup; decrease the pressure setting or increase the tip size.
J
Jeremy ShawSep 4, 2025
Why does my Graco Paint Sprayer keep tripping the circuit breaker?
- U
  ufernandezSep 4, 2025
  If your Graco Paint Sprayer trips the building circuit breaker after running for a few minutes, try freeing up the circuit by unplugging other appliances or using a less busy circuit. Check the sprayer's electrical cord for damage, such as broken insulation or wires, and replace it if damaged.
S
Sarah HornSep 6, 2025
How to improve spray pattern on a Graco MAGNUM 232738 at maximum pressure?
- M
  Michelle BarrSep 6, 2025
  If your Graco Paint Sprayer's pressure is set to maximum but you can't achieve a good spray pattern, try selecting a smaller spray tip. If the issue persists, the spray tip might be worn and needs replacement. Ensure that the extension cord is not too long or of an insufficient gauge; replace it if necessary. Check the spray gun fluid filter and the InstaClean fluid filter (XR9 only) for clogs; clean or replace them as needed. Also, clean any debris off the inlet screen.
R
Rachel DeanSep 8, 2025
Why is the spray pattern of my Graco Paint Sprayer varying dramatically?
- M
  Mary DavisSep 9, 2025
  If your Graco Paint Sprayer's fan pattern varies dramatically while spraying, the pressure control switch might be worn, causing excessive pressure variation. The suggested solution is to replace the pressure control knob.

Graco MAGNUM 232738 Specifications

General

Model	MAGNUM 232738
Type	Airless Paint Sprayer
Max Pressure	3000 PSI
Flow Rate	0.24 GPM
Hose Length	50 ft
Power Source	Electric
Voltage	120 V
Horsepower	0.5 HP

Summary

Important Safety Instructions

Warnings

Pressure Relief Procedure

Grounding and Electrical Requirements

General Repair Information

Basic Troubleshooting

Advanced Troubleshooting

Motor Does Not Operate

Troubleshooting steps for when the motor fails to start or the pump does not cycle.

Circuit Breaker is Tripping

Diagnosing issues when the building circuit breaker trips during sprayer operation.

Erratic Motor Operation

Low or Fluctuating Output

No Output

Excessive Pressure Build Up

Motor Diagnostics

Control Board Diagnostics

Pump Diagnostics

Pump Service

Technical Data

Graco Warranty

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