Description
Fuel Pump for Cummins ISX Single Cam, QSX Single Cam – Part Number 4359487
Why Choose Our New Fuel Pump for the ISX Single Cam or QSX Single Cam?
- Free return freight on cores
IMPROVE PERFORMANCE AND EXTEND THE LIFE OF YOUR DIESEL ENGINE
Your Cummins ISX Single Cam, QSX Single Cam is idling rough, misfiring when trying to accelerate or it’s consuming more fuel than normal. These are all symptoms of a failure in the fuel system. If you shop the competition, these problems could arise weeks, or even days, after installation. Why? Our competitors are good at making parts with a crisp, clean shine. But they aren’t experts at getting the necessary power to last another million miles.
At Highway and Heavy Parts, you’ll get a 4359487 Fuel Pump that has been manufactured in an ISO 9001:2015 certified facility, ensuring quality and consistency for your ISX Single Cam, QSX Single Cam. HHP offers only premium aftermarket parts for your ISX Single Cam, QSX Single Cam at a much lower price compared to the OE manufacturer to help put money back in your pocket.
Each part is crafted with hard-wearing strength and durability to ensure your ISX Single Cam can withstand the rigors you put it through. It is also built to strict specifications for proper fitment and functionality. As an added benefit, our parts are backed by our ASE-certified technicians on staff who can answer any technical question you have about your Cummins ISX Single Cam, QSX Single Cam.
With technical knowledge, quality products, fast shipping, and unbeatable customer service, HHP is the place to be!
Contents:
Cummins ISX Single Cam, QSX Single Cam Fuel Pump – (4359487)
Frequently Asked Questions: 4359487 Fuel Pump in Cummins ISX Single Cam
What is the function of the 4359487 fuel pump in Cummins ISX Single Cam engines?
The 4359487 fuel pump serves as the critical high-pressure fuel delivery component in Cummins ISX Single Cam and QSX Single Cam diesel engines, providing the precise fuel pressurization necessary for optimal common rail fuel injection system performance and engine reliability. This sophisticated fuel pump generates and maintains extremely high fuel pressures, typically ranging from 23,000 to 29,000 PSI, essential for proper fuel atomization and combustion characteristics in modern emissions-compliant diesel engines. The pump operates as a multi-piston unit that continuously pressurizes fuel drawn from the fuel tank and delivers it through the high-pressure fuel rail system to individual fuel injectors with millisecond precision timing control. During engine operation, the fuel pump works in coordination with the electronic control module to maintain consistent fuel rail pressure across varying engine speeds and load conditions, ensuring optimal fuel delivery for multiple injection events per combustion cycle. The pump’s internal components include precision-engineered pistons, cylinders, check valves, and pressure regulation systems that work together to create the intense pressures required for effective fuel injection while preventing system over-pressurization that could damage components or create safety hazards. Advanced engineering features enable reliable operation under extreme conditions including wide temperature variations, continuous duty cycles typical of commercial applications, and the corrosive effects of modern diesel fuel formulations and biodiesel blends. The fuel pump’s performance directly impacts engine power output, fuel efficiency, emissions production, and overall reliability, making it one of the most critical components in the ISX and QSX fuel systems. Proper fuel pump operation ensures the precise pressure control necessary for the engines’ sophisticated fuel injection strategies, including pilot injections for combustion noise reduction and post-injections for diesel particulate filter regeneration and selective catalytic reduction system efficiency. The pump must maintain consistent performance throughout extended service intervals while operating under demanding conditions typical of commercial trucking, construction equipment, and industrial applications where engine reliability is paramount for operational success.
Which Cummins engines are compatible with the 4359487 fuel pump?
The 4359487 fuel pump is specifically engineered for Cummins ISX Single Cam and QSX Single Cam diesel engines, representing advanced heavy-duty engine platforms that utilize sophisticated common rail fuel injection systems for optimal performance and emissions compliance. The ISX Single Cam engine features a simplified valve train design compared to dual cam configurations while maintaining the proven 15-liter displacement and reliability characteristics that have made ISX engines dominant in commercial trucking applications. This engine configuration utilizes a single overhead camshaft with rocker arm valve actuation, providing reduced complexity and maintenance requirements while delivering excellent performance and fuel economy in demanding commercial applications. The QSX Single Cam engine shares similar architectural features and fuel system requirements with ISX Single Cam variants, ensuring perfect compatibility with this fuel pump across both engine families for fleet standardization and inventory simplification. Both engines utilize identical common rail fuel injection systems with the same pressure requirements, flow characteristics, and electronic control integration that allow this single fuel pump part number to provide optimal performance across all compatible applications. These engines are available in multiple horsepower configurations ranging from 400 to over 500 horsepower, all sharing the same fundamental fuel system architecture that accommodates this specific fuel pump design for reliable operation under varying load conditions. Fleet operators managing Cummins-powered vehicles benefit from this broad compatibility that simplifies inventory management, reduces parts complexity, and streamlines fuel system maintenance procedures across different engine configurations and model years. The engines are commonly found in over-the-road trucks, vocational vehicles, construction equipment, marine applications, and stationary power generation systems where reliable fuel delivery is critical for sustained performance under demanding operating conditions. When selecting replacement fuel pumps, verification of specific engine model and serial number ensures proper fitment and optimal integration with existing fuel system components including fuel injectors, pressure sensors, and electronic control systems. Professional technicians rely on this compatibility information to maintain ISX and QSX fuel systems efficiently while ensuring optimal engine performance and emissions compliance throughout extended service intervals typical of commercial vehicle applications.
What are the symptoms of fuel pump failure in ISX Single Cam and QSX engines?
Fuel pump failure in Cummins ISX Single Cam and QSX Single Cam engines presents through progressive symptoms that indicate compromised fuel system performance requiring immediate attention to prevent engine damage and operational disruption. Rough idling represents one of the most noticeable early symptoms of fuel pump deterioration, manifesting as irregular engine RPM fluctuations, inconsistent idle quality, and engine vibration that becomes more pronounced as pump performance degrades over time. Engine misfiring during acceleration or under load conditions indicates insufficient fuel pressure or irregular fuel delivery from a failing pump, preventing proper fuel atomization and combustion efficiency that directly affects engine performance and drivability characteristics. Increased fuel consumption without corresponding changes in operating conditions or driving patterns suggests fuel pump inefficiency or pressure regulation problems that affect injection timing accuracy and fuel metering precision, resulting in poor combustion efficiency and higher operating costs. Hard starting conditions, particularly noticeable in cold weather operations, often indicate reduced fuel pump output or pressure instability that prevents proper fuel atomization during cranking cycles when precise fuel delivery is most critical for reliable ignition. Unusual engine noise including knocking, rattling, or irregular combustion sounds may indicate improper fuel injection characteristics from fuel pump pressure variations that affect combustion timing and cylinder pressure development throughout the operating range. Electronic diagnostic trouble codes related to fuel system pressure, fuel rail pressure sensors, or injection system performance frequently appear when fuel pump operation deviates from acceptable parameters, providing early warning of developing problems before complete failure occurs. Black or excessive exhaust smoke during normal operation suggests over-fueling conditions that may result from fuel pump pressure regulation problems or internal component wear affecting fuel metering accuracy and injection timing. Engine power loss under load conditions indicates insufficient fuel delivery during high-demand situations when maximum fuel pump output is required to maintain proper injection pressures and fuel flow rates throughout all cylinders. Complete fuel pump failure results in immediate loss of engine power and inability to restart, creating potentially dangerous situations for commercial vehicle operators and requiring immediate roadside assistance or towing services. Advanced symptoms may include fuel contamination in engine oil from internal pump component wear, unusual fuel odors in the engine compartment, or visible fuel leakage around pump connections indicating seal failure or housing damage requiring immediate replacement to prevent further system contamination.
How does HHP’s remanufactured 4359487 fuel pump compare to OEM alternatives?
HHP’s remanufactured 4359487 Cummins ISX fuel pump delivers exceptional performance and reliability through comprehensive remanufacturing processes conducted in ISO 9001:2015 certified facilities that ensure consistent quality and durability while providing significant cost savings compared to original equipment alternatives. The remanufacturing process begins with complete disassembly and thorough inspection of all internal components using precision measuring equipment to identify wear patterns, dimensional changes, and component degradation that could affect fuel pump performance and reliability. Critical components including pistons, cylinders, valves, sealing elements, and pressure regulation systems receive replacement with upgraded parts that often incorporate design improvements and enhanced materials compared to original equipment specifications. Manufacturing procedures maintain stringent cleanliness standards essential for fuel system components, utilizing specialized facilities and equipment designed specifically for fuel pump remanufacturing to prevent contamination and ensure optimal component performance. Each remanufactured fuel pump undergoes extensive performance testing including pressure generation verification, flow rate analysis, pressure regulation accuracy assessment, and endurance testing that ensures optimal operation throughout extended service intervals typical of commercial applications. The remanufacturing process incorporates lessons learned from field experience and engineering improvements that address known areas for enhancement in original equipment designs, resulting in enhanced durability and performance characteristics that frequently exceed OEM specifications. Quality control procedures include statistical process monitoring, comprehensive final inspection protocols, and performance verification testing that guarantees consistent manufacturing standards across all remanufactured units intended for demanding commercial service applications. Advanced testing equipment verifies critical performance parameters including maximum pressure generation capabilities, pressure regulation accuracy, flow rate consistency, and system response characteristics that ensure proper integration with ISX and QSX fuel injection systems. Cost savings compared to new OEM fuel pumps typically range from 30-50%, allowing fleet operators and independent owners to maintain equipment economically while receiving components that meet or exceed original performance standards and reliability expectations. The remanufacturing process supports environmental sustainability through component recycling and reuse while delivering performance that often surpasses new parts due to enhanced materials, improved manufacturing processes, and comprehensive quality control procedures. Free return freight on core exchanges eliminates additional costs and simplifies the purchasing process, making quality fuel system components accessible and affordable for commercial operators requiring reliable performance without compromising on quality or durability standards.
What warranty and technical support does HHP provide for the 4359487 fuel pump?
HHP provides comprehensive warranty coverage and extensive technical support for the 4359487 Cummins ISX fuel pump, demonstrating confidence in remanufacturing quality and commitment to customer success in demanding commercial applications where fuel system reliability is critical for operational success. The warranty program offers robust coverage terms that protect against manufacturing defects, component failures, and performance degradation under normal heavy-duty operating conditions, providing comprehensive protection that includes both replacement parts and associated labor costs during warranty claims processing. HHP’s technical support infrastructure features ASE-certified diesel technicians with specialized expertise in Cummins fuel systems and ISX/QSX engine technology who provide comprehensive assistance throughout the installation, operation, and service life of the fuel pump. Technical support services include detailed pre-installation compatibility verification to ensure proper fitment, step-by-step installation guidance with specific procedures and torque specifications, and post-installation performance verification assistance to ensure optimal fuel system integration and operation. The support team assists with complex diagnostic procedures using advanced scan tools and testing equipment, troubleshooting fuel system performance issues, and providing maintenance recommendations that maximize fuel pump service life and overall engine performance in commercial applications. Advanced technical support includes access to specialized diagnostic procedures, fuel system pressure testing protocols, electronic control system integration guidance, and comprehensive troubleshooting assistance that ensures proper operation with ISX and QSX engine management systems. HHP maintains extensive inventory levels and expedited logistics capabilities to ensure rapid warranty replacement availability, understanding that fuel pump failures can result in immediate vehicle shutdown and significant operational disruption for commercial operators who depend on reliable transportation for their livelihood. The streamlined warranty process features dedicated customer service representatives who understand the critical nature of fuel system components and the urgency of commercial vehicle repairs, coordinating expedited replacement parts and technical support to minimize operational downtime and impact. Additional support services include compatibility verification for specific ISX and QSX applications, detailed installation procedure guidance, ongoing technical consultation throughout the warranty period and beyond, and access to updated service bulletins and technical information. The comprehensive support infrastructure includes technical documentation libraries, specification sheets, diagnostic flowcharts, and troubleshooting guides that assist professional mechanics and fleet maintenance operations with successful fuel pump service, maintenance procedures, and performance optimization. Training resources and technical bulletins provide ongoing education about fuel system maintenance best practices, diagnostic procedures, and performance optimization techniques that help customers achieve maximum value and reliability from their fuel pump investment throughout its service life.
