Description
Cummins ISX Single and Dual Cam Crankshaft Assembly – Part Number: 3691444
Why Choose Our New Crankshaft Assembly for the Cummins ISX?
Restore reliability and performance to your Cummins ISX engine with the premium 3691444 crankshaft assembly from Highway and Heavy Parts. Often called the backbone of your diesel engine, this precision-forged crankshaft is essential for transmitting power to your oil pump, water pump, AC compressor, and alternator while converting reciprocating piston motion into rotational energy. Constructed from forged steel with precision-machined bearing journals, this crankshaft assembly delivers superior strength and durability compared to cast alternatives. Every component is brand new with zero core charge required, eliminating the uncertainties and delays associated with remanufactured options.
IMPROVE PERFORMANCE AND EXTEND THE LIFE OF YOUR DIESEL ENGINE
HHP’s Crankshaft Assembly for the Cummins ISX produces significantly higher reliability levels than worn or damaged OE components while restoring your diesel engine’s optimal power transmission efficiency. A properly functioning crankshaft is vital to the overall health of your rig, keeping your engine moving smoothly under all operating conditions. Our precision-engineered replacement crankshaft restores proper bearing clearances, eliminates excessive vibration, and ensures reliable power delivery to all engine-driven accessories. Manufactured in ISO 9001:2015 certified facilities using rigorous quality control processes, this crankshaft assembly meets or exceeds all OEM specifications for dimensional accuracy, hardness, and structural integrity.
Experiencing symptoms like low oil pressure, excessive engine vibration, rough running conditions, unusual knocking noises, or poor performance under load in your Cummins ISX? A new crankshaft assembly from HHP delivers the comprehensive solution needed to restore your engine to like-new operating specifications and prevent catastrophic engine failure.
Premium Forged Steel Construction for Maximum Durability
The 3691444 crankshaft assembly features advanced forged steel construction that delivers exceptional strength, superior wear resistance, and enhanced structural integrity compared to traditional cast iron crankshafts. This premium manufacturing process creates a denser molecular structure with improved grain flow alignment, providing maximum resistance to the extreme torsional stresses, bending loads, and bearing pressures encountered in heavy-duty diesel engine operation. Each crankshaft undergoes precision machining and polishing of all bearing surfaces to ensure optimal oil film thickness and minimize friction losses.
Precision-Engineered Specifications for ISX Applications
Designed specifically for Cummins ISX15, QSX15, ISG, and related diesel engines, the 3691444 crankshaft assembly incorporates exact specifications for flawless performance:
- Forged steel construction for superior strength and longevity
- Precision-ground main bearing journals with exact dimensional tolerances
- Precision-ground rod bearing journals for optimal connecting rod support
- Thrust bearing surfaces machined to specifications
- Gear mounting provisions for timing gear installation
- Compatible with standard and oversized bearing configurations
- Approximately 324 pounds net weight for heavy-duty applications
Each dimension is precision-machined to exacting tolerances, ensuring perfect fitment and optimal performance in ISX engine configurations without modifications or adjustments.
Compatible OEM Cross-References and Engine Applications
The 3691444 crankshaft assembly replaces multiple Cummins OEM part numbers including 4330732, 4925762, 4925761, 3681911, 3608889, 5440758, 4920289, 4319022, 4923646, 5440757, and 5799NSZ. This broad compatibility ensures correct application across numerous ISX engine builds and serial number ranges. Compatible with ISX engines featuring CPL numbers including 2442, 2483, 2628, 2629, 2630, 2631, 2632, 2633, 2732, 2733, 2734, 2801, 2803, and many others across various production years and configurations. When in doubt, our ASE-certified technicians can verify compatibility using your engine serial number (ESN) before shipment.
Critical Importance of Crankshaft Replacement
The crankshaft serves as the foundation of your engine’s power generation and transmission system. When crankshaft problems develop, they can quickly escalate into catastrophic engine failure affecting pistons, connecting rods, cylinder walls, and engine block integrity. Replacing a damaged or excessively worn crankshaft is essential to ensure optimal engine performance and prevent progressive damage to other critical engine components. Ignoring crankshaft issues leads to increased vibration, accelerated bearing wear, oil pressure loss, and potential complete engine seizure resulting in extensive repair costs and prolonged downtime.
Why Choose New Components Over Remanufactured Crankshafts?
A new 3691444 crankshaft assembly offers distinct advantages over remanufactured alternatives: brand-new forged steel construction with zero previous wear history, all new precision-ground bearing surfaces and journals with exact tolerances, extended service life compared to rebuilt units with unknown service histories, superior dimensional accuracy ensuring proper bearing clearances, and no core charge required eliminating additional fees and waiting periods. While remanufactured crankshafts may provide acceptable value for some applications, new crankshaft assemblies ensure maximum reliability and performance restoration for critical ISX engine applications where dependable operation, extended service life, and peace of mind are essential priorities.
Professional Installation and Technical Support
Installing the 3691444 crankshaft assembly requires specialized tools, precision measurement equipment, and expert knowledge of proper installation procedures to ensure correct bearing clearances, thrust tolerances, and timing gear alignment. Professional installation is strongly recommended due to the complexity of crankshaft installation procedures and the critical need for precise measurement of main bearing clearances, rod bearing clearances, crankshaft end play, and thrust bearing specifications. Improper installation can result in catastrophic engine failure, premature bearing wear, excessive vibration, oil pressure loss, and complete engine seizure. The crankshaft undergoes detailed inspection and rigorous testing prior to packaging and ships well-protected for safe, secure delivery.
Every 3691444 Cummins ISX Crankshaft Assembly comes with comprehensive technical support from our team of ASE-certified diesel technicians who provide expert guidance throughout the entire process-from initial compatibility verification and bearing size selection through final installation procedures, torque specifications, and post-installation verification. With extensive technical knowledge, superior quality products, industry-leading shipping capabilities, and unbeatable customer service, HHP stands as your trusted partner for critical Cummins engine components.
Frequently Asked Questions – Cummins ISX Crankshaft Assembly
What is included with the Cummins ISX crankshaft assembly part number 3691444?
The 3691444 crankshaft assembly is a complete replacement component featuring forged steel construction with precision-ground main bearing journals, rod bearing journals, thrust bearing surfaces, and gear mounting provisions. This is a brand-new crankshaft assembly with no core charge required, eliminating additional fees and extended waiting periods associated with core returns. The assembly weighs approximately 324 pounds and includes all necessary specifications for proper ISX engine operation.
How does this new ISX crankshaft compare to OEM or remanufactured crankshafts?
This aftermarket Cummins ISX crankshaft assembly meets or exceeds OEM specifications while costing significantly less than dealer parts. Constructed from forged steel with precision-machined bearing surfaces, it features superior dimensional accuracy and structural integrity. The crankshaft is manufactured in ISO 9001:2015 certified facilities with rigorous quality control protocols. Unlike remanufactured crankshafts with unknown wear histories and potentially compromised metallurgical properties, this new unit provides maximum reliability, extended service life, and peace of mind for critical engine applications.
What are symptoms indicating my Cummins ISX crankshaft needs replacement?
Common symptoms indicating crankshaft replacement needs include low oil pressure readings, excessive engine vibration especially under load, rough running or misfiring conditions, unusual knocking or rumbling noises from the bottom end, metal debris or bearing material found in oil or oil filter, visible scoring or damage to crankshaft journals during inspection, and engine performance degradation. Any of these symptoms require immediate professional diagnosis, as crankshaft failures can quickly escalate into catastrophic engine damage affecting pistons, connecting rods, and block integrity.
Is professional installation required for the 3691444 crankshaft assembly?
Professional installation is absolutely essential for the 3691444 crankshaft assembly due to the complexity of crankshaft installation procedures and critical measurement requirements. Proper installation requires specialized tools including precision micrometers, dial bore gauges, plastigage for bearing clearance verification, torque wrenches, and engine hoist equipment. Installation procedures demand precise measurement of main bearing clearances, rod bearing clearances, crankshaft end play, thrust bearing specifications, and proper timing gear alignment. Improper installation can cause catastrophic engine failure, making professional installation mandatory for this critical component.
Which Cummins engines are compatible with the 3691444 crankshaft assembly?
The 3691444 crankshaft assembly is designed for Cummins ISX Series engines including ISX15, QSX15, ISG12, ISGe, and related diesel engine configurations used in over-the-road trucks, construction equipment, marine applications, generator sets, and stationary power units. Compatible with engines featuring CPL numbers including 2442, 2483, 2628, 2629, 2630, 2631, 2632, 2633, 2732, 2733, 2734, 2801, 2803, and many others across CM870, CM871, CM2250 engine control platforms and various production years. Contact our ASE-certified technicians for compatibility verification using your specific engine serial number.
