Replacement O-Ring For A Dexter Vault Grease Cap And Replacement For AD2528E0 Grease Seal

Updated 01/27/2026 | Published 08/15/2024

Products Featured in This Question

Replacement Trailer Hub Bearing - L68149

(2189)

$19.67

Double Lip Seal for 3,700-lb Marine Hubs

(197)

$19.78

Question:

Hi I have a dexter 4.2K axle with the Vault maintenance free hub on my boatmate trailer. I found most of the parts to rebuild my hub but still miss somes. I need: - 2x Race L68110 Found OK - 2x Bearing L68149 Found OK - 1x Dexter Hybrid Oil tube Found OK - 1X Double lip grease seal not found heres the generic P/N for the seal Industry standard PN: 256-168-SP2-1 NOK Seal PN: AD2528EO -1x O-Ring 2.328 for the Dexter vault protector cap. Could you help me find the corresponding parts for the last 2 items ? Regards Frank

asked by: Frank

Expert Reply:

Hi Frank,

Everything I can find says the AD2528EO grease seal has a 1.68" inner diameter and 2.56" outer diameter so you would be able to swap it out with the Double Lip Seal for 3,700-lb Marine Hubs # 168255TB.

For the O-ring you'll need part # DX22CR.

expert reply by: Kevin C

Gwendolyn Y.

1/27/2026

Hey Frank, how did the Double Lip Seal and O-ring work out for your Vault hub rebuild? Knowing what fit best could really help others working on similar Dexter axles.