Product Description
CUMMINS 3914707 OEM VACUUM PUMP TO POWER STEERING PUMP JAW COUPLING HUB FOR 1994-2002 5.9L CUMMINS
The Cummins 3914707 OEM jaw coupling hub is the factory-correct component that connects the vacuum pump to the power steering pump on 1994-2002 Dodge Ram trucks equipped with the 5.9L Cummins engine.
This coupling hub transfers rotational force between the vacuum pump and power steering pump to support proper steering assist and vacuum system operation.
Over time, worn or damaged coupling hubs may develop excessive play, vibration, noise, steering issues, or vacuum loss. Replacing the coupler with a genuine Cummins OEM component helps restore proper alignment, smooth operation, and long-term durability.
FEATURES
- Genuine OEM Cummins jaw coupling hub
- Connects vacuum pump to power steering pump
- Designed for 5.9L Cummins accessory drive systems
- Precision-machined spline and coupling geometry
- Heat-treated construction for durability
- Helps reduce vibration and misalignment
- Direct-fit OEM replacement design
FITMENT
- 1994 Dodge Ram 2500 5.9L Cummins
- 1994 Dodge Ram 3500 5.9L Cummins
- 1995 Dodge Ram 2500 5.9L Cummins
- 1995 Dodge Ram 3500 5.9L Cummins
- 1996 Dodge Ram 2500 5.9L Cummins
- 1996 Dodge Ram 3500 5.9L Cummins
- 1997 Dodge Ram 2500 5.9L Cummins
- 1997 Dodge Ram 3500 5.9L Cummins
- 1998 Dodge Ram 2500 5.9L Cummins
- 1998 Dodge Ram 3500 5.9L Cummins
- 1998.5-2002 Dodge Ram 2500 5.9L Cummins ISB
- 1998.5-2002 Dodge Ram 3500 5.9L Cummins ISB
Fitment Note: Verify compatibility using VIN or engine serial number before ordering.
WHAT'S INCLUDED
- 1 Cummins 3914707 jaw coupling hub
COMMON SYMPTOMS OF FAILURE
- Power steering assist loss
- Vacuum system failure
- Front accessory drive vibration
- Noise from the vacuum pump or steering pump area
- Loose or damaged pump coupling components
- Metal debris near the coupling assembly
RELATED PARTS
- Cummins vacuum pump gaskets
- Cummins power steering pump seals
- Cummins power steering pump mounting gaskets
- Cummins vacuum pump assemblies
- Cummins steering system service components
INSTALLATION NOTES
- Inspect both pump coupling jaws before installation
- Verify proper alignment during assembly
- Inspect pumps for wear or damage before reuse
- Replace leaking gaskets and seals during service
- Torque all fasteners to factory specifications
SPECIFICATIONS
- Brand: Cummins
- Part Number: 3914707
- Product Type: Vacuum pump to power steering pump jaw coupling hub
- Engine Compatibility: 5.9L Cummins 12-valve and 24-valve
- Fitment Years: 1994-2002
- Vehicle Compatibility: Dodge Ram 2500 and 3500
- Function: Mechanical pump drive coupling
- Cross Reference: 3906697, 3935851
- GTIN: 190910244917
- UPC: 190910244917
- Approximate Shipping Weight: 0.75 pound
- Shipping Method: Standard ground shipping
- Condition: New genuine Cummins OEM part
FAQ
What does this coupling hub do?
This coupling hub mechanically connects the vacuum pump and power steering pump so both systems can operate properly from the engine accessory drive.
What are signs of a failing coupling hub?
Common symptoms include steering assist loss, vacuum issues, vibration, noise, or visible wear inside the coupling assembly.
Can a failed coupling hub damage the pumps?
Yes. Excessive play or misalignment can lead to premature wear or damage to the vacuum pump and power steering pump.
Is this a genuine Cummins OEM part?
Yes. Cummins 3914707 is a genuine OEM Cummins coupling hub designed for factory fit and durability.
Should related seals and gaskets be replaced during installation?
Yes. Replacing associated gaskets and seals during pump service is recommended to help prevent leaks and future service issues.
