Compatible Machines & Quick Overview
The Graco 243190 Intake Seat Repair Kit restores suction and prime on pumps that use the matching intake valve assembly. Check your sprayer’s fluid section (e.g., 243-183, 243-189, 244-195) for a safe match before ordering.
Compatible Machines
Fits Graco® pumps using intake valve assemblies found in the fluid sections listed above, including the following popular models and variants:
- Ultra Max 695 (select configurations using 243-183 / 243-189 / 244-195 fluid sections)
- ST Pro 395 — Hi-Boy / Lo-Boy
- ST Pro 455 — Hi-Boy / Lo-Boy / Complete variants
- ST Pro 495 — Hi-Boy / Lo-Boy
- 495 Duron Pro / Performance Plus / Pro (e.g., 232990)
- Other compatible legacy units using the above fluid sections
What’s in the Kit
| Component | Purpose |
| Carbide Seat | Provides the hardened sealing surface for the inlet ball to ensure reliable check-valve action. |
| Lower Inlet Ball | Seals against the seat during pressure stroke; lifts during suction to draw material in. |
| Ball Guide Spacer | Centers/alignment piece that helps the ball track correctly for consistent sealing. |
| Lower Packing O-Ring | Seals the intake assembly to prevent air leaks that cause loss of prime. |
Key Benefits
- Restores suction & prime on tired pumps exhibiting intake leakage.
- OEM-grade parts for fit and durability in demanding spraying.
- Quick service—no full fluid-section swap required in many cases.
Install & Use Tips
- Confirm your fluid section number (e.g., 243-183, 243-189, 244-195) matches this kit.
- Clean the intake cavity thoroughly; remove all old debris and inspect the ball guide cage.
- Seat orientation matters—follow torque and assembly steps in the Graco manual.
- Prime and test at low pressure first; verify no air ingestion or leakage at the intake.
Quick Tech Summary
| Part Number | 243190 |
| Assembly Location | Intake (suction) side of the pump’s fluid section |
| Typical Symptoms Solved | Loss of prime, poor suction, inlet check leaking/back-flow |
| Compatibility Check | Match to fluid section (e.g., 243-183 / 243-189 / 244-195) and model variant |
Frequently Asked Questions
Locate your sprayer’s fluid section number on the pump tag or in the parts manual. If it’s one of the known matches (e.g., 243-183, 243-189, 244-195), this kit is designed for that intake valve assembly. When in doubt, cross-reference the exploded view for the intake check components.
Common signs include loss of prime, visible back-flow at the intake, and difficulty drawing material even after proper priming. Wear on the seat or ball prevents a complete seal, reducing suction and output pressure stability.
Thoroughly clean the intake cavity, install the seat in the correct orientation, use the new O-ring, and follow the manual’s torque guidance. After assembly, prime at low pressure and verify sealing before spraying at production pressure.
Typically no additional sealant is required on the seat interface. If the manual calls for a specific thread treatment on related fasteners, use only what’s specified.
Strain materials, flush promptly after use, avoid running the pump dry, and keep inlet filters clean. Abrasive or heavily filled coatings accelerate wear; inspect the intake check periodically.
