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
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.
Product Page this Question was Asked From
Replacement Trailer Wheel Bearing - L68149 - Qty 1
- Trailer Bearings Races Seals Caps
- Bearings
- Standard Bearings
- 1.38 Inch I.D.
- Bearing L68149
- Race L68111
- 3500 lbs Axle
- etrailer
more information >
Continue Researching
- Shop: Replacement O-Ring for Dexter Vault Hybrid Lubrication System - 1.98" Cap
- Search Results: wear ring
- Search Results: wear sleeve
- Search Results: oil bath seal
- Search Results: o~ring
- Search Results: hub oil
- Search Results: 256 168 sp2 1
- Search Results: oil seal
- Q&A: Replacement Trailer Hub Grease Seal for AD2528EO
- Shop: Dexter Oil Seal - Double Lip - I.D. 1.687" / O.D. 2.561" - 3.7K to 4.2K Axles - Qty 1
- Q&A: Correct Replacement for UFP H-1377 Trailer Hub
- Q&A: How to Correctly Position Oil/Grease Seal in Trailer Hub
- Shop: Bearing Buddy Bearing Protectors - Model 2717A w/ Auto Check - Chrome Plated - Qty 2
- Shop: Spindle Grease Seal Set for LM48548 or L68149 Inner Bearing and 1.980, 1.968 or 2.562 Bearing Buddy
- Shop: Kodiak Synthetic Bearing Oil for Oil Bath Hubs - 8 oz Bottle
- Shop: Easy Grease Trailer Idler Hub Assembly for 3.5K Axles - 5 on 4-1/2 - Galvanized
- Shop: Spindle Grease Seal Set for L44643 Inner Bearing and 1.980 Bearing Buddy
- Q&A: When Using Bearing Buddy Bearing Protectors Do I Need To Repack Bearings Periodically?
- Q&A: Replacement Grease Seal For Seal Marked TBY 42.77 65.07 12.7
- Q&A: Ranger Trailer Cool Hub Replacement Grease Seal AD2527E
- Q&A: Replacement Bearings, Races and Oil Seals for Ranger Tandem Axle Boat Trailer with Cool Oil Hubs
- Shop: Trailer Hitch
- Article: Trailer Wiring Diagrams
- Video: Measuring To Choose The Right Trailer Axle
- Article: How to Measure for Trailer Hitch Drop
- Shop: Trailer Wiring
- Article: How to Measure Your Trailer Wheel Bolt Pattern
- Shop: Suspension Enhancement
- Video: Review of etrailer Trailer Hubs and Drums - Hub with Drum - AKHD-545-35-EZ-K
- Shop: Brake Controller
on Trailer Bearings Races Seals Caps
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.