Graco 390 PC Cordless Electric Control Box and filter parts List

Graco 390 PC Cordless Electric Control Box and Filter Parts List

When it comes to professional paint spraying, the Graco 390 PC Cordless Electric Airless Sprayer stands out for its portability, reliability, and performance. Whether you’re spraying residential interiors or tackling light commercial jobs, this cordless powerhouse provides the flexibility of battery operation without sacrificing precision or control. But like any high-performance tool, it requires routine maintenance—and that starts with authentic replacement components.

At SprayersandParts.com, we provide the full Graco 390 PC Cordless Electric Control Box and Filter Parts List, making it easy to source the exact parts you need to keep your sprayer in peak condition. From control box replacements to inlet strainers and manifold filters, we’ve got your entire system covered.

Why Choose the Graco 390 PC Cordless Sprayer?

The Graco 390 PC Cordless Sprayer, powered by DeWalt® 20V MAX batteries, delivers powerful, consistent spray performance in places where power cords can't go. It's built on the same trusted platform as the corded 390 PC but gives painters the freedom to work anywhere—without compromising flow rate or finish quality.

Key highlights:

• ProConnect™ Pump Replacement System for fast and easy repairs.

• Endurance Pump rated for up to 2X the life of competitors.

• SmartControl 1.0 with pressure adjustment and LED diagnostics.

• Fully cordless operation, compatible with existing DeWalt 20V MAX batteries.

But the brain of this cordless sprayer lies in its electric control box—a component that monitors power delivery, pressure regulation, and system diagnostics. Maintaining this control system, along with proper filtration, is key to extending the sprayer’s lifespan.

Graco 390 PC Cordless Electric Control Box: Overview & Replacement

The electric control box on the Graco 390 PC Cordless is the central command hub for the sprayer. It regulates power from the battery, maintains consistent output pressure, and interfaces with onboard diagnostic systems. If your sprayer is experiencing intermittent power issues, low pressure, or diagnostic light errors, a damaged control box could be the culprit.

Key Functions of the Graco Control Box:

• Converts battery voltage to regulated spray pressure.

• Communicates with the motor to maintain consistent spray output.

• Provides diagnostics through indicator LEDs.

• Protects the motor from overload and thermal failure.

Common Replacement Control Box Parts:

Here’s a breakdown of the Graco 390 PC Cordless control system parts typically found in our inventory:

• Control Box Assembly – Part #17C721
  Complete replacement for damaged or malfunctioning control units. Includes all internal circuits pre-installed.

• Pressure Control Knob – Part #17C737
  Used to adjust output pressure. Over time, knobs may wear out, crack, or lose grip.

• Control Box Wiring Harness – Part #17C746
  Connects battery input, trigger, and motor. Vital for clean signal transmission.

• LED Indicator Panel – Part #17C750
  Shows error codes, pressure levels, and battery diagnostics.

All control box components are OEM parts made to Graco’s specifications—ensuring full compatibility with your Graco 390 PC cordless model.

Graco 390 PC Cordless Filter Parts: Keep It Clean for Optimal Spray

Proper filtration is essential to maintaining even spray patterns and preventing clogs in your tip, gun, or pump. The Graco 390 PC cordless sprayer is engineered with multiple filtration points: the inlet strainer, manifold filter, and gun filter.

Here are the most common filter parts for the 390 PC cordless:

1. Inlet Strainer – Part #244067

• Positioned at the suction tube to catch large particles before they reach the pump.

• Essential for preventing pump wear and tip clogs.

• Replace every 3–5 jobs depending on material.

2. Manifold Filter – Part #244067 or 244068 (fine/medium)

• Installed in the pump manifold housing.

• Screens out smaller particles that make it past the inlet strainer.

• Select the correct mesh size based on your application (60 mesh for latex, 100 mesh for stains).

3. Spray Gun Filter – Part #287032 (blue, 100 mesh) or 287033 (red, 60 mesh)

• Mounted directly inside the gun handle.

• Filters materials right before the tip for maximum pattern quality.

• Swap regularly to avoid buildup and reduce downtime.

Using clean filters and replacing them at proper intervals ensures your cordless Graco sprayer performs consistently from job to job.

Full Graco 390 PC Cordless Parts List: Control Box & Filters

Below is a quick-reference list of common parts for both the control box and filter systems in the Graco 390 PC Cordless Electric Sprayer:

For visual learners, our exploded parts diagram for the Graco 390 PC cordless sprayer is available on every product page to assist with easy identification and installation.

Fast Shipping and Expert Support

Time is money, and that’s why most orders placed before 12 PM Central ship same-day from Graco warehouse ( Terms and Conditions apply). Whether you need a single Graco 390 PC control box or a complete filter maintenance kit, we’ll get it to you fast—so you can stay focused on the job.

Need help with compatibility or installation? Our veteran support staff is ready to provide:

•  Phone consultations

•  Torque and wiring specs

•  Legacy part conversions and superseded SKUs

•  Troubleshooting for error lights or performance dips

Pro Tips for Longer Sprayer Life

Maximize the lifespan of your Graco 390 PC cordless sprayer by following these best practices:

• Clean all filters after each job and replace worn components before clogs affect spray pattern.

• Use Graco Pump Armor to protect internal components during storage.

• Monitor your LED panel for battery life and system diagnostics—address issues early.

• Keep a spare control box assembly and filter kit in your truck to avoid downtime on-site.

Order Graco 390 PC Cordless Control Box and Filter Parts Today

Don’t let a minor component issue bring your project to a halt. With our extensive Graco 390 PC cordless parts list, SprayersandParts.com makes it easy to spec, source, and ship the parts you need fast.

Browse our selection of control box assemblies, filters, wiring harnesses, and more to get your Graco cordless sprayer back to full strength. All parts are factory-authorized, in-stock, and supported by our experienced team.

 Shop now to get your Graco 390 PC Cordless Electric Sprayer parts and finish the job with confidence.