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Operation, Parts
Electric Airless
Sprayers
For portable airless spraying of architectural paints and coatings. For
professional use only.
Not approved for use in explosive atmospheres or hazardous (classified)
locations.
390 Models:
3300 psi (228 bar, 22.8 MPa) Maximum Working Pressure
See page 4 for additional model information.
Important Safety Instructions
Read all warnings and instructions in this manual and related manuals before using
the equipment. Be familiar with the controls and the proper usage of the equipment.
Save these instructions.
Important Medical Information
Read the medical alert card provided with the gun. It contains injection injury
treatment information for a doctor. Keep it with you when operating the equipment.
X005493EN
Rev. C
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Table of Contents
Related Manuals for Graco Ultimate 390
Summarization of Contents
Operation, Parts Electric Airless Sprayers
Important Safety Instructions
Read all warnings and instructions before using the equipment and save them.
Important Medical Information
Read the medical alert card for injection injury treatment information.
Translated Manuals
Link to Languages
Locate translated manuals online by scanning the QR code.
Models
Related Manuals
Find English manuals and translations at www.graco.com.
Safety Symbols
Safety Alert Symbol
Indicates important safety messages and requires attention.
General Warnings
Grounding
Ensures product safety by reducing risk of static sparking and electric shock.
Extension Cords
Guidelines for using 3-wire, 12 AWG extension cords to ensure proper performance.
Fire and Explosion Hazard
Prevent fire and explosion by avoiding flammable materials and ignition sources.
Electric Shock Hazard
Ensure proper grounding, setup, and usage to prevent electric shock.
Skin Injection Hazard
High-pressure spray can inject toxins; seek immediate surgical treatment if injection occurs.
Equipment Misuse Hazard
Misuse of equipment can cause death or serious injury.
Pressurized Aluminum Parts Hazard
Incompatible fluids can cause chemical reaction and rupture of pressurized aluminum parts.
Moving Parts Hazard
Moving parts can cause injury; keep clear and do not remove guards.
Toxic Fluid or Fumes Hazard
Toxic fluids or fumes can cause serious injury or death. Read SDS.
Personal Protective Equipment
Wear appropriate protective gear like eyewear, respirators, and gloves.
Component Identification
Stand Models
Identifies components of the electric airless sprayer stand models.
Hi-Cart Models
Identifies components of the electric airless sprayer hi-cart models.
Grounding
Extension Cords
Use a 3-wire, 12 AWG extension cord with undamaged ground contact.
Pails
Use conductive metal pails on a grounded surface for solvent/oil-based fluids.
Pressure Relief Procedure
Steps for Pressure Relief
Follow these steps to safely relieve pressure before servicing or cleaning.
Trigger Lock
Engage the trigger lock to prevent accidental spraying when the gun is unattended.
Setup
Initial Setup Procedure
Steps to perform when unpacking the sprayer for the first time or after long-term storage.
Throat Packing Nut Fill
Fill throat packing nut with Throat Seal Liquid daily to prevent packing wear.
Flushing Procedure
Flush the sprayer with fluid to prepare it for operation.
Final Setup Checks
Check for leaks and repeat flushing if initial fluid is incompatible with paint.
Startup
Pre-Startup Checks
Perform Pressure Relief Procedure and set controls to lowest settings before starting.
Circulating Paint
Allow paint to circulate until it flows out the drain tube, then check for leaks.
Operation
Spray Tip Installation
Properly install the spray tip and tip guard to avoid serious injury.
Aligning Spray Pattern
Align the spray guard horizontally or vertically for desired spray pattern.
Spray Pattern Adjustment
Adjust pressure to minimize overspray and heavy edges for a good spray pattern.
Clear Tip Clog
Follow steps to unclog the spray tip and resume spraying safely.
Cleanup Procedure
Flush the sprayer with water or compatible fluid and wipe down components.
Purging Hose Fluid
Purge fluid from the hose by raising the suction tube above flushing fluid.
Protective Coating Application
Apply compatible fluid or Pump Armor to prevent freezing and corrosion.
Filter Maintenance
Remove, clean, inspect, and install new filters if damaged.
Maintenance
Routine Maintenance Schedule
Perform regular inspections, cleaning, and adjustments for optimal sprayer performance.
Recycling and Disposal
End of Product Life
Dismantle and recycle the product responsibly according to regulations.
Troubleshooting
Mechanical/Fluid Flow Issues
Diagnose and resolve low pump output or poor spray pattern problems.
Low Pump Output & Leakage
Address issues like pressure drop, worn packings, or throat packing leaks.
Electrical Issues
Resolve problems like the sprayer not running, not shutting off, or having errors.
Error Code Messages
Interpret error codes displayed on the LED status light for troubleshooting.
390 Stand Sprayers Parts
Parts Identification (Stand Models)
Diagram and reference numbers for stand model components.
390 Hi-Cart Sprayers Parts
Parts Identification (Hi-Cart Models)
Diagram and reference numbers for hi-cart model components.
Filter
Filter Assembly
Diagram showing the components of the sprayer's filter assembly.
Motor
Motor Assembly
Diagram illustrating the motor components and their arrangement.
390 Parts List
Component Part Numbers
Comprehensive list of sprayer parts with corresponding order numbers.
Wiring Diagrams
120V Wiring Diagram
Schematic showing the electrical connections for 120V models.
240V / 110V UK Wiring Diagram
Schematic showing electrical connections for 240V and 110V UK models.
Technical Specifications
390 Models Specifications
Detailed technical data for 390 models, including pressure, delivery, and dimensions.
California Proposition 65
Graco Information
Contact and website information for Graco products, patents, and ordering.
Graco Standard Warranty
Warranty Terms and Conditions
Details the warranty coverage, limitations, and exclusions for Graco equipment.
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