Troubleshooting a Dexter Vault Hub that Has Popped Out Slightly
Updated 10/06/2025 | Published 09/29/2025
Products Featured in This Question
Question:
I have Dexter vault hubs on my vexus bass boat trailer. 3 of the 4 are flush with the end cap .. however one protrudes out slightly. Does this mean that something is wrong with the hub that 4 one that protrudes out. I provided photos to help articulate the issue. Thank you for any advise you can provide.
asked by: Steve J
(click to enlarge)
(click to enlarge)
Expert Reply:
Hey Steve, thanks for the pictures. That's normal. The Dexter vault hubs popping out slightly like that shows the system is pressurized. It'll pop out all the way if there's a leak or a problem.
I would check the other one though. It looks like it's leaking at the pilot hole but I don't know how long that grease has been there. I recommend wiping off the grease and seeing if it leaks out again. If it does you'll most likely want to replace that axles vault kit.
We have four options based on your axle capacity. I have listed them below:
2,500 lbs - 3,500 lbs - Dexter Vault Hybrid Lubrication Kit item # DX52UR
4,200 lbs - 5,200 lbs - Dexter Vault Hybrid Lubrication Kit item # DX23ER
6,000 lbs - Dexter Vault Hybrid Lubrication Kit item # DX83ER
7,000 lbs - Dexter Vault Hybrid Lubrication Kit item # DX73ER
How long have those vault hubs been installed?
Product Page this Question was Asked From
Dexter Trailer Axle Beam with Standard Spindles - 89" Long - 3,500 lbs
- Trailer Axles
- Leaf Spring Suspension
- Standard Grade
- No Hubs
- 3500 lbs
- Spindles Only
- 74 Inch Spring Center
- 89 Inch Hub Face
- No Drop or Lift
- Dexter
more information >
Continue Researching
- Q&A: Replacement Brake Assemblies for Dexter 3,500 lb Trailer Axle
- Q&A: Lookiing To Upgrade Axles On 2015 Keystone Cougar 33RBK
- Q&A: Dimensions of Spindle on 3,500 Pound Dexter Trailer Axle
- Q&A: How to Determine the Appropriate Solar Panel Kit For an Off Grid Trip in a 2006 Starcraft Trailer
- Q&A: Replacement Axle Options For AL-KO 4,400LB Axles w/ 85" Hub Face, 6 on 5-1/2" Bolt Pattern w/ Brakes
- Q&A: Upgrading to 6k Axle on 2019 Grand Design Relfection 28BH
- Article: How to Measure a Trailer Axle
- Q&A: How to Determine if Trailer Axle e73SR Can be Used as Replacement
- Article: Trailer Wiring Diagrams
- Article: How to Measure Your Trailer Wheel Bolt Pattern
- Article: 5 Tell-Tale Signs It’s Time to Replace Your Trailer’s Leaf Springs
- Article: How to Tell the Weight Rating of a Trailer Axle
- Article: How to Replace Trailer Leaf Springs in 5 Steps
- Article: How to Accurately Measure Trailer Leaf Springs
Steve J.
10/6/2025
Thank you so much for the input ... I will check them closer and monitor them moving forward .