Product Description
The CUMMINS 4940183 OEM TURBO OIL SUPPLY FITTING (MALE UNION) WITH O-RING is designed for various 5.9L and 6.7L Cummins diesel engine applications. This genuine Cummins fitting provides a secure connection between the engine oil supply circuit and the turbocharger oil feed system, helping ensure proper lubrication and long-term turbocharger reliability.
Use this part when repairing oil leaks, replacing a damaged turbo oil feed fitting, servicing the turbocharger oil supply system, or during engine and turbocharger rebuilds. Always verify fitment by engine serial number before ordering.
FEATURES
- Genuine Cummins OEM turbo oil supply fitting
- Includes pre-installed O-ring seal
- Direct-fit replacement for applicable Cummins engines
- Helps maintain proper turbocharger oil supply
- Designed for long service life and leak-free operation
- Ideal for maintenance, repair, or turbocharger replacement projects
FITMENT
- 2003–2007 Dodge Ram 2500/3500 5.9L Cummins Common Rail
- 2007.5–2024 Ram 2500/3500 6.7L Cummins
- Select Cummins ISB, QSB, and industrial engine applications
- Additional applications may apply based on engine serial number
WHAT'S INCLUDED
- 1 Cummins 4940183 OEM Turbo Oil Supply Fitting (Male Union)
- 1 Integrated O-Ring Seal
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 4940183
- Cummins Turbocharger Oil Supply Components
- Cummins Turbocharger Installation Hardware
- Cummins Turbo Oil Drain Components
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 4940183
- Part Type: Turbo Oil Supply Fitting (Male Union)
- Seal Included: Yes, O-Ring
- Engine Compatibility: 5.9L Cummins, 6.7L Cummins
- Vehicle Application: Dodge Ram / Ram 2500 and 3500
- Installation Location: Turbocharger Oil Supply Circuit
- Condition: New OEM Cummins
- Installation Type: Direct Replacement
FAQ
Will this fitting fit my truck?
This fitting is commonly used on 5.9L and 6.7L Cummins applications. Always verify fitment by engine serial number before ordering.
Does this fitting include the O-ring?
Yes. Cummins 4940183 includes the sealing O-ring required for installation.
What does this fitting do?
This fitting supplies pressurized engine oil to the turbocharger, allowing proper lubrication of the turbocharger bearings.
When should this fitting be replaced?
Replacement is recommended if the fitting is damaged, leaking, corroded, or being serviced during turbocharger replacement.
Can a leaking oil supply fitting cause turbocharger problems?
Yes. Oil leaks or restrictions in the turbo oil supply system can affect turbocharger lubrication and may lead to premature turbocharger wear or failure.
Do I need any related parts?
Inspect the turbo oil feed line, oil drain tube, seals, gaskets, and turbocharger mounting hardware during installation and replace worn components as needed.
