Product Description
CUMMINS 4919809 OEM HYDRAULIC PUMP (POWER STEERING) – RAM 5.9L 24V (1998.5–2002)
The genuine CUMMINS 4919809 OEM hydraulic pump restores factory steering assist, reduces pump noise, and eliminates fluid aeration issues on your 1998.5–2002 Dodge Ram 2500/3500 equipped with the 5.9L 24-valve Cummins engine. This pump is engineered to deliver proper flow and pressure to both the power steering system and the hydroboost brake assist (where equipped), ensuring safe, predictable steering performance.
Unlike aftermarket replacements that often suffer from early seal failures, inconsistent pressure output, or weak housings, the 4919809 Cummins pump uses OEM-quality internals, tight tolerances, and upgraded sealing materials designed for the severe vibrations and loads found on B-series diesel platforms. If your steering feels heavy, jerky, or excessively noisy, this direct-fit Cummins replacement eliminates guesswork and restores OE functionality.
This pump pairs perfectly with other genuine Cummins front-engine components such as the CUMMINS 3930330 power steering reservoir and the CUMMINS 52001155AE pressure hose for a complete steering system refresh.
Key Features
- Genuine Cummins OEM hydraulic pump – engineered for B-series diesel steering and brake assist loads.
- Restores proper steering assist on 1998.5–2002 24-valve Cummins Ram trucks.
- Reduces steering noise, pulsation, and aeration caused by worn pumps.
- Direct-fit OEM replacement with correct mounting, pulley alignment, and port orientation.
- Compatible with hydroboost brake systems used on many 2500 and 3500 models.
Fitment Details
- Engine: 5.9L Cummins ISB 24-Valve
- Model Years: 1998.5–2002
- Vehicles: Dodge Ram 2500 / 3500
- System: Power steering & hydroboost hydraulic assist
Always verify by VIN/ESN to ensure correct pump selection.
Cross-Reference & Companion Parts (Cummins Only)
For optimal steering performance, pair this pump with other Cummins OEM components:
- CUMMINS 3930330 OEM POWER STEERING RESERVOIR
- CUMMINS 52001155AE OEM POWER STEERING PRESSURE HOSE
- CUMMINS 5086870AA RETURN HOSE
Common Cross-References: 4919809, 4937407, 5086155AA, 5086155AB (verify by VIN/ESN).
Installation Notes
- Flush the hydraulic system completely before installing the new pump.
- Replace contaminated or aerated fluid to prevent premature pump wear.
- Inspect all hoses for soft spots, leaks, and internal collapse.
- Bleed the system properly to remove trapped air.
Specifications for cummins 4919809
| Attribute | Value |
|---|---|
| Brand | Cummins (Genuine OEM) |
| Cummins Part Number | 4919809 |
| Cross Reference | 4937407, 5086155AA, 5086155AB (verify by VIN/ESN) |
| Function | Hydraulic power steering and hydroboost assist pump |
| Engine Compatibility | 5.9L ISB 24-Valve Cummins |
| Vehicle Fitment | 1998.5–2002 Ram 2500/3500 |
| UPC | 607389024019 |
| GTIN | 607389024019 |
| Shipping Weight | Approx. 8.5 lb |
| Typical Shipping Method | Standard ground (expedited available) |
| E-Codes | Non-emissions part; hydraulic assist component |
| Prop 65 Warning | WARNING: This product can expose you to chemicals including lead and petroleum-based fluids. For more information, visit www.P65Warnings.ca.gov. |
| Country of Origin | As labeled by Cummins (varies by lot) |
Frequently Asked Questions
WILL THIS FIT MY 1998.5–2002 24-VALVE CUMMINS?
Yes—this pump is the correct OEM replacement for most 5.9L 24-valve Ram 2500/3500 trucks. Always confirm by VIN/ESN for accuracy.
DOES THIS PUMP WORK WITH HYDROBOOST BRAKE SYSTEMS?
Yes. The 4919809 pump supplies hydraulic pressure for both power steering and hydroboost brake assist.
SHOULD THE RESERVOIR OR HOSES BE REPLACED AT THE SAME TIME?
Highly recommended. A contaminated reservoir or collapsing pressure/return hoses can rapidly damage a new pump. Consider replacing the OEM reservoir and associated hoses.
IS THIS A BRAND-NEW PUMP OR REMANUFACTURED?
This listing is for a brand-new genuine Cummins OEM pump, not a remanufactured unit.
WHAT FLUID SHOULD I USE?
Use the fluid type recommended by Chrysler/Dodge for your model year. Avoid “universal” fluids that may cause aeration or seal degradation.
