Applicable Models:
The front axle knuckle tube seal kit compatible with 250 350 450 550 Super Duty with Dana Super 60 front axle 2005-2019.

Substitute Part Number:
Updated Outer Tube Seals: 2014835
Inner Knuckle Seals: 2017426
O-Rings: 54983

Function:
The main function is to avoid the leakage of lubricating oil and the intrusion of external impurities. Specifically, the knuckle seal ensures the tightness of the knuckle area and avoids the leakage of lubricating oil from that area.
The oil seal of the outer pipe plays the role of sealing the outer pipe, avoiding the leakage of lubricating oil from the outer pipe part, and avoiding the external other impurities from entering the bearing inside, causing damage to the bearing.

Note:
It is recommended to confirm your own model before buying!