Description
Don’t risk your fuel system with poor-quality parts. Get a replacement from HHP!
Your Detroit Diesel DD15 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 days, after installation. Why? Our competitors are keen 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 Piston Pump that has been manufactured in an ISO 9001:2015 certified facility, ensuring quality and consistency for your Detroit Diesel DD15. HHP offers only premium aftermarket parts for your Detroit Diesel DD15 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 Detroit Diesel DD15 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 Detroit Diesel DD15.
With technical knowledge, quality products, fast shipping, and unbeatable customer service, HHP is the place to be!
Contents:
Detroit Diesel DD15 Piston Pump – (4720901550)
Frequently Asked Questions
What is the function of the 4720901550 piston pump in Detroit Diesel DD15 engines?
The 4720901550 piston pump serves as the high-pressure fuel delivery system in Detroit Diesel DD15 engines, generating and maintaining the extreme fuel pressures necessary for optimal common rail fuel injection system performance and emissions compliance in modern heavy-duty applications. This sophisticated piston pump creates fuel pressures typically ranging from 25,000 to 30,000 PSI, essential for proper fuel atomization and combustion characteristics that define DD15 engine performance standards in commercial trucking and industrial applications. The pump operates continuously during engine operation, drawing fuel from the tank through the primary and secondary filtration systems and pressurizing it for precise distribution through the high-pressure fuel rail to individual fuel injectors with millisecond timing accuracy controlled by the engine’s advanced electronic control module. The piston pump design incorporates multiple precision-engineered pistons operating in synchronized cylinders that create the intense pressures required for DD15’s sophisticated fuel injection strategies, including pilot injections for noise reduction, main injection events for power generation, and post-injections for diesel particulate filter regeneration and selective catalytic reduction system efficiency. Internal components feature advanced materials and precision manufacturing including hardened pistons, cylinders, check valves, pressure regulation systems, and overflow circuits that maintain consistent fuel pressure while preventing over-pressurization that could damage fuel system components or create safety hazards in commercial applications. The pump’s performance directly impacts critical engine parameters including power output, fuel efficiency, emissions production, and overall reliability, making it one of the most essential components in the DD15 fuel system architecture that enables compliance with stringent EPA emissions standards. Advanced engineering features ensure reliable operation under extreme conditions including temperature variations from -40°F to over 200°F, continuous duty cycles typical of long-haul trucking operations, and the potentially corrosive effects of modern ultra-low sulfur diesel fuel formulations and biodiesel blends used in commercial vehicle fleets. Proper piston pump operation enables the precise pressure control necessary for DD15’s advanced combustion management strategies that optimize fuel economy while meeting strict NOx and particulate matter emissions requirements through coordinated operation with exhaust gas recirculation, diesel oxidation catalyst, diesel particulate filter, and selective catalytic reduction systems.
Which Detroit Diesel engines are compatible with the 4720901550 piston pump?
The 4720901550 piston pump is specifically engineered for Detroit Diesel DD15 engines, representing one of the most advanced and successful heavy-duty diesel engine platforms in modern commercial vehicle applications including over-the-road trucking, vocational vehicles, and industrial equipment. This piston pump also replaces Detroit Diesel part number 4720901550, ensuring broad compatibility across multiple DD15 model years, configurations, and applications within the engine family. DD15 engines feature a proven 14.8-liter displacement with advanced common rail fuel injection technology that requires the precise high-pressure fuel delivery characteristics provided by this sophisticated piston pump design. The DD15 engine family encompasses multiple horsepower ratings ranging from 400 to over 600 horsepower, all utilizing the same fundamental common rail fuel system architecture that accommodates this piston pump specification across various performance configurations and applications. These engines incorporate cutting-edge emissions compliance systems including asymmetric turbocharging, exhaust gas recirculation, diesel oxidation catalyst, diesel particulate filter, and selective catalytic reduction that depend on the precise fuel delivery characteristics provided by this high-pressure piston pump to maintain optimal performance and regulatory compliance. DD15 engines are available in multiple configurations including different cooling systems, turbocharging arrangements, and emissions packages, all maintaining compatibility with this piston pump design for standardized fleet maintenance and parts inventory management. Fleet operators managing Detroit Diesel-powered vehicles benefit from this comprehensive DD15 compatibility that simplifies inventory management, reduces parts complexity, and streamlines fuel system maintenance procedures across different engine configurations, model years, and vocational applications. The DD15 platform is commonly deployed in Class 8 over-the-road trucks, regional delivery vehicles, refuse haulers, concrete mixers, fire trucks, and other heavy-duty vocational applications where reliable fuel delivery is critical for sustained performance under demanding operating conditions and duty cycles. Manufacturing variations and model year differences within the DD15 family maintain fuel system compatibility, allowing this piston pump to serve as a reliable replacement across multiple production years and engine specifications while ensuring optimal integration with existing fuel system components. When selecting replacement piston pumps, verification of specific DD15 engine model and serial number ensures proper fitment and optimal performance integration with existing fuel injectors, pressure sensors, fuel rails, and electronic control systems that manage the sophisticated fuel injection timing and pressure control strategies.
What are the symptoms of piston pump failure in Detroit Diesel DD15 engines?
Piston pump failure in Detroit Diesel DD15 engines presents through distinctive and progressive symptoms that indicate compromised fuel system performance requiring immediate attention to prevent engine damage and costly operational disruption in commercial vehicle operations. Rough idling represents one of the most noticeable and common early symptoms of piston pump deterioration, characterized by irregular engine RPM fluctuations, inconsistent idle quality, and engine vibration that becomes increasingly pronounced as pump performance degrades and fuel pressure consistency deteriorates over time. Engine misfiring during acceleration or under load conditions indicates insufficient fuel pressure or irregular fuel delivery from a failing piston pump, preventing proper fuel atomization and combustion efficiency that directly affects engine performance, drivability, power output, and emissions compliance characteristics essential for DD15 operation. Increased fuel consumption without corresponding changes in operating conditions, driving patterns, load factors, or route characteristics suggests piston pump inefficiency or pressure regulation problems that affect injection timing accuracy and fuel metering precision, resulting in poor combustion efficiency and significantly higher operating costs that impact fleet profitability. Hard starting conditions, particularly noticeable in cold weather operations or after extended shutdown periods, often indicate reduced piston pump output or pressure instability that prevents proper fuel atomization during cranking cycles when precise fuel delivery is most critical for reliable ignition and smooth engine startup. Unusual engine noise including knocking, rattling, or irregular combustion sounds may indicate improper fuel injection characteristics resulting from piston pump pressure variations that affect combustion timing, cylinder pressure development, and overall engine smoothness throughout the operating range from idle to maximum power output. Electronic diagnostic trouble codes related to fuel system pressure, fuel rail pressure sensor readings, injection system performance, or emissions system efficiency frequently appear when piston pump operation deviates from acceptable parameters established by the DD15’s sophisticated engine control module, providing early warning of developing problems before complete system failure occurs. Black or excessive exhaust smoke during normal operation suggests over-fueling conditions that may result from piston pump pressure regulation problems or internal component wear affecting fuel metering accuracy, injection timing precision, and emissions control system effectiveness. Engine power loss under load conditions indicates insufficient fuel delivery during high-demand situations when maximum piston pump output is required to maintain proper injection pressures and fuel flow rates to all cylinders while supporting turbocharger operation and emissions control systems. Complete piston pump failure results in immediate loss of engine power and complete inability to restart, creating potentially dangerous situations for commercial vehicle operators and typically requiring immediate roadside assistance, towing services, and significant operational downtime that affects delivery schedules and customer commitments.
How does HHP’s remanufactured 4720901550 piston pump compare to OEM quality?
HHP’s remanufactured 4720901550 Detroit Diesel DD15 piston pump delivers exceptional performance and reliability that meets or exceeds original equipment manufacturer standards through comprehensive remanufacturing processes conducted in ISO 9001:2015 certified facilities with stringent quality control procedures and advanced testing protocols. The remanufacturing process begins with complete disassembly and thorough inspection of all internal components using precision measuring equipment, advanced diagnostic tools, and specialized testing apparatus to identify wear patterns, dimensional changes, component degradation, and performance characteristics that could affect piston pump reliability or service life in demanding commercial applications. Critical components including pistons, cylinders, valves, sealing elements, pressure regulation mechanisms, drive components, and electronic control interfaces receive replacement with upgraded parts that often incorporate design improvements, enhanced materials, superior manufacturing processes, and advanced surface treatments compared to original equipment specifications. Manufacturing procedures maintain the highest cleanliness standards essential for high-pressure fuel system components, utilizing specialized facilities, equipment, environmental controls, and contamination prevention protocols designed specifically for piston pump remanufacturing to ensure optimal component performance throughout extended service intervals. Each remanufactured piston pump undergoes extensive performance testing including pressure generation verification, flow rate analysis, pressure regulation accuracy assessment, response time evaluation, endurance testing under simulated operating conditions, and comprehensive quality assurance protocols that ensure optimal operation under the demanding conditions typical of DD15 applications in commercial vehicle service. The remanufacturing process incorporates valuable lessons learned from field experience, failure analysis, engineering improvements, and technological advances that address known areas for enhancement in original equipment designs, often resulting in enhanced durability, improved performance characteristics, extended service life, and superior reliability that frequently exceeds OEM specifications and expectations. Quality control procedures include rigorous statistical process monitoring, comprehensive final inspection protocols, extensive performance verification testing, and detailed documentation that guarantees consistent manufacturing standards and reliability across all remanufactured units intended for demanding commercial service applications where fuel system reliability directly impacts operational success. Advanced testing equipment and procedures verify critical performance parameters including maximum pressure generation capabilities, pressure regulation accuracy and stability, flow rate consistency across varying operating conditions, electronic control system response characteristics, and long-term durability that ensure proper integration with DD15 fuel injection systems and engine management controls. Cost savings compared to new OEM piston pumps typically range from 35-55%, allowing fleet operators, independent owners, and commercial vehicle operations to maintain equipment economically while receiving components that deliver reliable performance, optimal fuel efficiency, and compliance with emissions regulations throughout extended service intervals typical of commercial vehicle applications.
What warranty and technical support does HHP provide for the 4720901550 piston pump?
HHP provides comprehensive warranty coverage and extensive technical support for the 4720901550 Detroit Diesel DD15 piston pump, demonstrating exceptional confidence in remanufacturing quality and unwavering commitment to customer success in demanding commercial applications where fuel system reliability directly impacts operational profitability, delivery schedules, and business reputation. The warranty program offers robust and generous coverage terms that protect against manufacturing defects, component failures, premature wear, and performance degradation under normal heavy-duty operating conditions, providing comprehensive financial protection that includes both replacement parts and associated labor costs during warranty claims processing and resolution procedures. HHP’s technical support infrastructure features ASE-certified diesel technicians with specialized expertise in Detroit Diesel fuel systems, DD15 engine technology, common rail injection systems, and emissions control equipment who provide comprehensive assistance throughout the entire ownership experience from initial installation consultation through extended service intervals and maintenance programs. Technical support services include detailed pre-installation compatibility verification to ensure proper fitment with specific DD15 configurations and model years, comprehensive step-by-step installation guidance with precise procedures and torque specifications, thorough post-installation performance verification assistance, and ongoing diagnostic support to ensure optimal fuel system integration and reliable long-term operation. The expert support team assists customers with complex diagnostic procedures using advanced scan tools and testing equipment, comprehensive troubleshooting of fuel system performance issues, emissions system integration problems, and detailed maintenance recommendations that maximize piston pump service life while optimizing overall engine performance, fuel efficiency, and emissions compliance in commercial applications. Advanced technical support capabilities include access to specialized diagnostic procedures, comprehensive fuel system pressure testing protocols, electronic control system integration guidance, emissions system troubleshooting assistance, and extensive problem-solving support that ensures proper operation and compatibility with DD15 engine management systems and sophisticated emissions control equipment. HHP maintains extensive inventory levels and sophisticated expedited logistics capabilities to ensure rapid warranty replacement availability and minimal downtime, understanding that piston pump failures can result in immediate vehicle shutdown and significant operational disruption for commercial operators who depend on reliable transportation for customer service, delivery commitments, and business operations. The streamlined warranty process features dedicated customer service representatives who thoroughly understand the critical nature of fuel system components and the urgency of commercial vehicle repairs, coordinating expedited replacement parts, comprehensive technical support, and priority shipping to minimize operational downtime and financial impact on customer business operations. Additional support services include detailed compatibility verification for specific DD15 applications and configurations, comprehensive installation procedure guidance with troubleshooting assistance, ongoing technical consultation throughout the warranty period and beyond, access to updated service bulletins and technical information, and consultation on preventive maintenance programs that maximize equipment reliability and operational efficiency while reducing total cost of ownership.
