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Home > Agricultural Machinery Parts > China 4941464 Cummins Lubricating Oil Pump Replacement for Tier 4 Interim 8.9 liter ISC/ISL engines Manufacturer, Supplier
China 4941464 Cummins Lubricating Oil Pump Replacement for Tier 4 Interim 8.9 liter ISC/ISL engines Manufacturer, Supplier
China 4941464 Cummins Lubricating Oil Pump Replacement for Tier 4 Interim 8.9 liter ISC/ISL engines Manufacturer, Supplier
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China 4941464 Cummins Lubricating Oil Pump Replacement for Tier 4 Interim 8.9 liter ISC/ISL engines Manufacturer, Supplier
China 4941464 Cummins Lubricating Oil Pump Replacement for Tier 4 Interim 8.9 liter ISC/ISL engines Manufacturer, Supplier

China 4941464 Cummins Lubricating Oil Pump Replacement for Tier 4 Interim 8.9 liter ISC/ISL engines Manufacturer, Supplier

4941464 Lubricating Oil Pump is a dedicated replacement part engineered by Cummins for Tier 4 Interim emissions regulations, primarily designed for the 8.9-liter ISC/ISL series engines. As the power hub of the engine lubrication system, its precision hydraulic design and low-friction structure optimization deliver precise pressure and flow of lubricating oil to critical engine components such as the cylinder block, crankshaft, and turbocharger. It can directly replace the original equipment part for maintenance, widely serving emission-compliant models in commercial vehicles, construction machinery, and other fields. It is a core component ensuring efficient emission reduction and long-term operation of engines during the Tier 4 transition phase.

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Product Description

1
Overview

4941464 Lubricating Oil Pump Replacement Part features a dual-gear meshing structure. The pump body is integrally cast from high-strength ductile iron, with gears nitrided for enhanced wear resistance. Its design precisely matches the compact layout of ISC/ISL 8.9-liter engines. Optimized for the higher thermal load demands of Tier 4 transition engines, it enhances oil flow patterns and pressure regulation response speed. It operates reliably under extreme temperatures ranging from -35°C to 130°C and high-vibration conditions. Each unit undergoes a 45-minute variable load operation test prior to shipment to ensure flow and pressure parameters fully comply with original equipment manufacturer standards.

2
Specifications
Part Name Lubricating Oil Pump Part Number 4941464
Drive Mode Gear drive Pump Type Oil Pump
Engine Mode Diesel Engine Origin China
Operating Temperature -30℃-120℃ Quality OEM standard
Compatible Engine Tier 4 Interim 8.9 liter ISC/ISL engines Unit Lubricating Oil Pump
Related Part Number 3966840, 3950005, 3942723, 3948072, 3991123, 4983588
Application Area Commercial Vehicle Sector: Designed for heavy-duty trucks and long-haul coaches equipped with ISC/ISL 8.9-liter engines, ensuring continuous lubrication for components like turbochargers and valve mechanisms. Suitable for frequent start-stop cycles.
Construction Machinery Sector: Serves excavators, loaders, and cranes, delivering stable pressure lubrication in dusty, high-vibration environments. Meets Tier 4 transition requirements.
Specialized Vehicles: Ideal for sanitation trucks and mixer trucks. Addresses intermittent high-load operations with rapid pressure response.
Stationary Power: Compatible with stationary generator sets and pump stations, reducing the risk of shutdown failures.
3
Key Features
✔
Tier 4 Compliance Optimized lubricant injection angle and pressure curves for aftertreatment system coordination in 8.9L ISC/ISL engines, preventing oil ingress and ensuring emission compliance.
✔
Extreme Condition Stability Ductile iron pump body with 400MPa compressive strength and nitrided gears (HV800). Reduces wear rates by 70% and extends service life up to 10,000 hours.
✔
High Efficiency & Energy Savings Low-friction bearing design and optimized gear clearance (≤0.03mm) reduce power consumption by 8%, boosting fuel economy by 3%-5%.
✔
Convenient Maintenance Modular structure allows replacement without engine block removal. Can be completed using standard tools within 2 hours.
4
Compatible Models
Engine Models:
  • 6C8.3 / B3.3
  • ISL CM2150 / CM850
  • ISL8.9 CM2150 L110 / CM2880
  • ISL9 CM2150 SN / ISL9.5
  • L8.9 / L9 / L9.5
  • QSC8.3 CM2880 C102
  • QSL8.9 / QSL9 / QSL9.3
Included in Kits:
  • 5562870 Long block
  • 5563125 Long block
  • 5563181 Long block
  • 5565568 Long block
  • 5565569 Long block
  • 5565570 Long block
  • 5591526 Long block
5
Frequently Asked Questions
Is the 4941464 oil pump compatible with all emission stages?
It is primarily designed for Tier 4 Interim emission-compliant ISC8.9 and ISL8.9 series engines. It is not compatible with Tier 3 or earlier models due to differing lubrication system parameters.
Does this replacement part match the performance of the genuine pump?
Yes, the performance is fully equivalent. All core parameters, including flow rate, pressure, and material composition, are identical to the original part and have passed performance verification.
How do I know if my engine needs a new oil pump?
Key indicators include: oil pressure fluctuations outside the 1.5 - 4.2 bar range, abnormal metallic noises from the pump area, lubrication leaks, or rapid oil degradation.
Are specialized tools required for installation?
No specialized tools are needed. Standard socket and torque wrenches are sufficient. It is designed to perfectly match OEM mounting holes and interfaces.
What are the common causes of low oil pressure?
Common causes include inappropriate oil viscosity, low oil levels, a clogged inlet filter, excessive gear wear (clearance > 0.03mm), or a stuck pressure regulating valve.
What post-installation checks should be performed?
Idle the engine for 5 minutes to stabilize pressure, check for leaks at all interfaces, and ensure pressure remains between 3.0-4.2 bar at rated speeds.

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