The Graco 17C539 Front Cover is an original equipment replacement designed to fit Ultra Max II 390, 395 and 490 airless sprayer models. Engineered from robust polymer, this front cover safeguards vital components against dust and debris, ensuring optimal spray performance and mechanical reliability. Its precise fit accommodates high-pressure filtration systems and maintains consistent flow for professional coatings application, reducing downtime. Ideal for both contractors and rental fleets, it delivers long-term durability and dependable protection for demanding jobsite conditions.
Ideal for maintenance and repair workshops, this genuine Graco cover simplifies routine service tasks and helps maintain spray accuracy over time. The straightforward installation process aligns perfectly with factory specifications, enabling a seamless swap without modifications. By preserving the integrity of the pump housing and piston assembly, you ensure uninterrupted operation, extend component life and uphold consistent finish quality in every project. This cost-effective replacement also offers enhanced durability under high-pressure spray conditions.
$13.8Graco 17C539 front cover serves as a critical shield for the hydraulic components inside professional-grade sprayers. Precision-machined from high-grade aluminum alloy, this cover tackles the harsh demands of coating applications with confidence. Users will notice how its corrosion-resistant finish stands up to solvents and water-based solutions alike, while internal pressure stability remains uncompromised. Simple dowel-pin alignment ensures repeatable installation, minimizing operator downtime during upkeep cycles.
Engineers chose a die-cast aluminum substrate for its superior strength-to-weight ratio, effectively reducing sprayer mass without sacrificing ruggedness. Finite element analysis guided the thickened rib geometry, which reinforces stress points created by fluid pulse cycles. A multi-stage anodized layer offers both electrical insulation and abrasion resistance, enhancing the cover’s lifespan under dynamic loads. Internal channels remain unobstructed thanks to precision CNC finishing, delivering consistent fluid flow and preventing dead zones where debris might accumulate.
Users upgrading to this front cover will immediately observe improved sealing integrity around the pump chamber. Reduced leakage and tighter tolerances lower maintenance frequency, translating into higher output and less unplanned downtime. Ideal for systems employing a pump paint sprayer mechanism, this component also contributes to steadier pressure regulation during continuous operation. As a result, surface finishes appear more uniform, even when working with heavy-body coatings or fast-curing enamels.
Begin by depressurizing the sprayer and removing the inlet and outlet lines. Gently extract the existing cover using an 8 mm socket, then clear any residual sealant from the mating face. Apply a uniform bead of high-temp silicone or specialized gasket maker, aligning dowel holes before seating the new cover. Torque bolts in a crisscross pattern to approximately 18 N·m, avoiding over-tightening that could warp the alloy. Reattach fluid hoses, bleed air from the system, and perform a test cycle to confirm leak-free operation.
Inspect the cover’s O-ring seal during every scheduled service interval, looking for cuts or compression set. Clean mating surfaces with isopropyl alcohol and a lint-free cloth to remove paint residue and solvent build-up. Incorporating graco airless sprayer accessories such as inline filters and wear kits can further extend service life by capturing particulates before they reach internal passages. Regular lubrication of the hydraulic piston assembly also prevents premature metal-on-metal contact.
Compatibility extends across multiple Graco electric and gas-powered models, ensuring versatile deployment on-site. Users can combine this cover with OEM gasket sets, pump rebuild kits, and recommended upgrade packages. When paired with the correct fluid section parts, it forms an integral part of a complete refurbishment process, ideal for preventing downtime on high-demand jobs. Endorsed by factory-trained technicians, installation support ensures that fluid dynamics remain optimal after each service.
Certified repair centers and authorized distributors offer expert assistance ranging from diagnostic evaluations to full spray system overhauls. Replacement parts undergo rigorous quality checks before dispatch, guaranteeing consistent performance in the field. Integration with graco paint gun accessories is seamless, delivering a cohesive system ready for commercial and industrial coatings applications. For tailored service agreements or rapid-response maintenance, contact your local Graco representative to keep operations running at peak efficiency.
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