Product Description
The CUMMINS 4939587 OEM ENGINE OIL PUMP is designed for 1989–2002 5.9L 12-valve and 24-valve Cummins diesel engines, as well as select 4BT and 6BT Cummins applications. This genuine Cummins oil pump is built to restore proper engine oil circulation and lubrication while maintaining OEM fitment, reliability, and durability.
Use this part when servicing low oil pressure concerns, oil pump wear, engine rebuilds, or lubrication system failure points. Always verify fitment by year, make, model, engine, and engine serial number before ordering.
FEATURES
- Genuine Cummins OEM engine oil pump
- Direct-fit replacement for applicable 5.9L Cummins engines
- Designed for 1989–2002 12-valve and 24-valve Cummins applications
- Compatible with select Cummins 4BT and 6BT engines
- Helps restore proper oil flow and engine lubrication
- Recommended for engine repair, maintenance, or rebuild work
FITMENT
- 1989–1993 Dodge Ram 250/350 5.9L Cummins 12-Valve
- 1994–1998 Dodge Ram 2500/3500 5.9L Cummins 12-Valve
- 1998.5–2002 Dodge Ram 2500/3500 5.9L Cummins 24-Valve
- Select Cummins 4BT applications
- Select Cummins 6BT applications
WHAT'S INCLUDED
- 1 Cummins 4939587 OEM Engine Oil Pump
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 4939587
- Cummins 4BT Engine Lubrication Components
- Cummins 6BT Engine Lubrication Components
- Cummins Oil Pickup Tube and Gasket Components
- Cummins Front Gear Housing and Timing Components
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 4939587
- Part Type: Engine Oil Pump
- Engine Compatibility: 5.9L Cummins 12V, 5.9L Cummins 24V, 4BT, 6BT
- Fitment Years: 1989–2002
- Vehicle Application: Dodge Ram 250/350 and Ram 2500/3500
- Condition: New OEM Cummins
- Installation Type: Direct Replacement
- System: Engine Lubrication System
FAQ
Will this oil pump fit my truck?
This oil pump fits many 1989–2002 Dodge Ram 5.9L Cummins 12-valve and 24-valve applications. Always verify fitment by year, engine, and engine serial number before ordering.
Is this a genuine Cummins oil pump?
Yes. Cummins 4939587 is a genuine OEM Cummins engine oil pump designed to meet factory fitment and performance requirements.
Does this fit 4BT and 6BT engines?
This oil pump is commonly used in select Cummins 4BT and 6BT applications. Engine serial number verification is recommended before ordering for industrial, commercial, or swapped-engine applications.
What are signs of a failing engine oil pump?
Common symptoms can include low oil pressure, oil pressure warning lights, abnormal engine noise, bearing wear, or lubrication-related engine damage.
Should this be replaced during an engine rebuild?
Yes. Replacing the oil pump during a rebuild is recommended to help restore proper lubrication and protect internal engine components.
Do I need any related parts?
Inspect the oil pickup tube, gaskets, front cover components, pressure relief components, and related hardware during installation and replace worn parts as needed.
