Graco 190 PC Express User Manual

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334567E

EN

Operation, Parts

Electric Airless

Sprayers

For professional use only.

Not approved for use in explosive atmospheres or hazardous locations.

For portable airless spraying of architectural paints and coatings.

190/290/390 PC Classic Models:

3000 psi (207 bar, 20.7 MPa) Maximum Working Pressure

3300 psi (228 bar, 22.8 MPa) Maximum Working Pressure

See page 3 for additional model information.

Important Safety Instructions

Read all warnings and instructions in this manual and related manuals. Be familiar with

the controls and the proper usage of the equipment. Save these instructions.

Related Manuals

Gun – 311861 (Contractor/FTx) 312830 (SG3) Pump – 334599

ti25126a

Use only genuine Graco replacement parts.

The use of non-Graco replacement parts may void warranty.

Table of Contents

Questions and Answers:

M
martinezdanielleAug 14, 2025
What to do if fluid is spitting from my Graco 190 PC Express Paint Sprayer gun?
- R
  Ronald LoweryAug 15, 2025
  If your Graco Paint Sprayer is spitting fluid, it could be due to a few reasons. There might be air in the pump or hose; check and tighten all fluid connections, and cycle the pump slowly during priming. Also, the spray tip could be partially clogged; clear the tip. Finally, the fluid supply might be low or empty; refill the fluid supply and prime the pump, checking the fluid supply often to prevent running the pump dry.
E
Erin McdanielAug 18, 2025
Why is my Graco Paint Sprayer pump difficult to prime?
- T
  travispotterAug 18, 2025
  If your Graco Paint Sprayer is difficult to prime, it could be due to several reasons. There might be air in the pump or hose. In this case, check and tighten all fluid connections and cycle the pump as slowly as possible during priming. Another cause might be a leaking intake valve. Clean the intake valve, ensuring the ball seat is not nicked or worn and that the ball seats well; then, reassemble the valve. Also, worn pump packings can cause priming issues; in this case, replace the pump packings. Finally, if the paint is too thick, thin it according to the supplier's recommendations.
R
Robert RochaAug 21, 2025
How to fix excessive paint leakage into the throat packing nut of my Graco 190 PC Express Paint Sprayer?
- W
  william55Aug 21, 2025
  If your Graco Paint Sprayer experiences excessive paint leakage into the throat packing nut, it could be because the throat packing nut is loose. Remove the throat packing nut spacer and tighten the throat packing nut just enough to stop the leakage. Another possibility is that the throat packings are worn or damaged, in this case replace packings. In other case, the displacement rod is worn or damaged, in this case replace the rod.
L
Leah Salinas MDAug 28, 2025
What to do if the motor runs but the pump doesn't stroke on my Graco 190 PC Express Paint Sprayer?
- A
  Ashley SullivanAug 28, 2025
  If your Graco Paint Sprayer motor runs but the pump does not stroke, it could be due to a damaged connecting rod assembly. In this case, replace the connecting rod assembly. Another possible cause is damaged gears or drive housing. Inspect the drive housing assembly and gears for damage and replace if necessary.
K
kristybryanAug 31, 2025
Why does my Graco 190 PC Express stop after running for only 5 to 10 minutes?
- M
  Michelle CookAug 31, 2025
  If your Graco Paint Sprayer operates for only 5 to 10 minutes and then stops, the pump packing nut might be too tight. When the pump packing nut is too tight, the packings on the pump rod restrict pump action and overload the motor. Loosen the pump packing nut and check for leaks around the throat. If necessary, replace the pump packings.
E
emilygibsonSep 4, 2025
What to do if my Graco 190 PC Express will not shut off after reaching maximum pressure?
- D
  Dana JacksonSep 4, 2025
  If your Graco Paint Sprayer will not shut off after reaching or exceeding maximum pressure, check the pressure control. Disconnect the pressure control; if the sprayer still runs, replace the control board. If the sprayer stops, replace the pressure control.
C
Cassandra GreeneSep 7, 2025
Why does my Graco 190 PC Express Paint Sprayer not run at all?
- B
  burkeangelaSep 7, 2025
  If your Graco Paint Sprayer does not run at all, check the electrical supply, pressure control connections, pressure control, replaceable fuse, and motor leads. Ensure that there is AC voltage: 100-130V for 110-120VAC models or 210-255V for 230VAC models.
M
Madison RiveraSep 10, 2025
How to troubleshoot basic electrical problems with my Graco 190 PC Express Paint Sprayer?
- M
  Mr. Christopher King PhDSep 10, 2025
  For basic electrical problems with your Graco Paint Sprayer, ensure the motor leads are securely fastened and properly mated. Replace loose terminals and crimp them to the leads, ensuring they are firmly connected. Clean the circuit board terminals and securely reconnect the leads.

Graco 190 PC Express Specifications

General

Brand	Graco
Model	190 PC Express
Category	Paint Sprayer
Language	English

Summary

Key Safety Instructions

Safety Warnings and Grounding

Grounding Safety Procedures

Explains the importance of proper grounding to prevent electric shock and static discharge.

Fire and Explosion Hazard Warnings

Injection and Equipment Misuse Hazards

Equipment Misuse Precautions

Warns against unsafe practices like operating while fatigued or near children.

Electrical, Chemical, and Toxic Hazards

Personal Protective Equipment (PPE)

Grounding and Power Requirements

Pail Usage and Grounding

Pressure Relief Procedure

Trigger Lock Engagement

Sprayer Setup Procedure

Sprayer Startup Guide

Routine Maintenance Schedule

Troubleshooting: Mechanical/Fluid Flow

Troubleshooting: Electrical Issues

Wiring Diagrams: 110/120V

Wiring Diagrams: 230V

Technical Specifications

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