The Graco 287551 Pump Cylinder Repair Kit ensures your airless sprayer performs at peak efficiency. Designed for durable operation with professional coatings, this comprehensive kit includes precision-engineered parts that restore cylinder integrity and maintain consistent pressure during demanding projects. Engineered with industry-leading rubber compounds and precision machining, it reduces wear and tear while boosting high-pressure performance. As a vital component in maintenance, it’s ideal for contractors seeking reliable airless sprayer accessories to extend equipment life.
Optimized for high-pressure filtration and seamless fluid delivery, this kit works seamlessly with Graco units such as the GMax II 3900 and RentalPro 360G. Crafted to reduce blow-by and maintain consistent output, it features a robust cylinder sleeve and solid PTFE packings for lasting performance. Pair it with genuine graco airless paint sprayer hose to guarantee uniform finishes and minimize downtime. Elevate your finishing process with proven durability, professional results, and industry-grade reliability.
The Graco 287551 Pump Cylinder Repair Kit is engineered to restore pump efficiency in a range of high-pressure applications, integrating seamlessly with airless sprayer platforms that handle professional coatings. Its core design emphasizes advanced seal longevity, precise tolerances, and corrosion-resistant materials optimized for fluid dynamics under extreme pressure cycles. By replacing worn cylinder sleeves, diaphragms, and O-ring assemblies, this kit enhances cycle life, reduces maintenance downtime, and ensures consistent flow rates across heavy-viscosity coatings. Ideal for environments from production lines to mobile service units in drum cage texas, it delivers repeatable performance.
Manufactured following strict Graco standards and validated on graco 395 sprayer test stands, the kit includes components that withstand pressures exceeding 4,000 psi while maintaining optimal high-pressure filtration and minimal volumetric slip. Each element undergoes ultrasonic cleaning and laser measurement for diameter consistency, ensuring tight sealing interfaces and minimal wear. With graco 395 sprayer compatibility, the kit integrates into existing lubrication channels and manifold ports without requiring flange modifications, preserving factory-intended flow characteristics. The assembly also features anti-corrosion surface treatments and ISO-certified tolerance verification, further safeguarding against particulate ingress and performance drift during extended operation.
At the heart of the 287551 kit is a duplex stainless steel cylinder sleeve, selected for its balance of hardness and corrosion resistance in professional coatings environments. The sleeve’s 17-4 PH precipitation-hardened alloy matrix delivers a Rockwell C hardness rating above 40, ensuring long-term resistance to galling under dynamic pressure cycles. Elastomeric O-rings are formulated from perfluoroelastomer compounds, offering superior chemical inertness in solvent-borne paints and urethanes, while backup rings of PTFE minimize seal extrusion at high differential pressures. The plunger tip uses a proprietary surface treatment to reduce friction and contribute to enhanced pump efficiency. Additionally, all parts are rated for continuous operation across a -10°C to 60°C temperature window.
Installation requires precise disassembly and reassembly sequences to preserve alignment of the cylinder axis and plunger rod. Begin by depressurizing the spray system, then remove the manifold housing using a torque wrench set to manufacturer specifications. Clean all mating surfaces and inspect replacement parts for dimensional conformity, checking individual tolerances against calibration standards. Lubricate seals sparingly with Graco-approved synthetic grease, then torque cylinder retainer nuts in a cross-pattern to the required 100–120 in-lb range using a calibrated torque tool. Applying a medium-strength thread locker prevents vibrational loosening.
Each cylinder kit undergoes hydraulic performance testing to validate flow rate stability and leak-free operation. Typical test parameters include cycling at 30 strokes per minute and pressures up to 3,000 psi for a 10,000-cycle verification, with temperature monitoring to detect any heat-induced seal degradation. Flow variation remains within ±2% over the test interval, ensuring predictable output when applying high-viscosity coatings like epoxies and polyurethanes. High-pressure filtration assessment guarantees that internal clearances maintain contaminant exclusion down to 5 microns, preserving seal longevity and preventing abrasive wear on critical surfaces. Acoustic noise levels during operation are monitored to ensure compliance with industrial standards for workplace safety.
Engineers specify the Graco 287551 kit for a variety of spray systems where precision control and durability are paramount. It is compatible with GMax II 3900 units, RentalPro 360G rigs, and multiple airless sprayer configurations designed for commercial paint lines. Integration with a magnum x5 paint sprayer platform extends its utility to contractor-grade operations requiring portable, high-output solutions. Common use cases include automotive coating booths, line striping equipment, offshore corrosion control sprays, and mobile maintenance trucks fitted with remote pump packs. System integrators appreciate the direct-fit design that avoids manifold rework and simplifies retrofitting in existing process lines.
Through a combination of material selection, precision machining, and rigorous quality control, the 287551 Cylinder Repair Kit delivers extended service life, often doubling component longevity compared to standard replacement parts. Reliability engineering principles are applied at every stage, from finite element analysis of stress distribution to accelerated life testing under cyclic load. The result is a kit that not only restores pump function but elevates overall system robustness, yielding lower total cost of ownership, fewer service interventions, and unwavering performance in demanding industrial environments. Statistical modeling predicts a mean time between failures exceeding 5,000 hours, while FEA confirms uniform stress dispersion across critical junctions.
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