Troubleshooting Trailer Hub Grease Cap Falling Off
Updated 07/08/2026 | Published 09/16/2025
Question:
i have 5 car hauler with 3 axle , the bearing cap keep falling and itis annoyiny because dot they put you out of service , is there any thing i can do , is there any thing in the market i can tie it real strong or may be round something from the wheel lognut over the bearing cap prevent it from falling
asked by: Sammy K
Expert Reply:
Hey Sammy, is it possible you are using a cap that is too small and it's able to fall out? Or is it possible you are overfilling the hub with grease and that is causing the cap to push itself off? Have you at the same time been having issues with the seal failing? Are all of the caps falling off?
Tim B.
6/30/2026
I am having the exact same problem with an axle. I just bought about a month ago from eTrailer. Every time I take it out the dust grease caps fall off. I have a brand new 2 inch drop axle, drum brakes, and the grease cap falls off every single trip on both sides. I have lost so far about six of them and they go on very tight every time I put them on. I definitely need help. Is it possible I put on the axle not too tight? And also the hubs that I got were already pre-packed with grease.
Jameson C.
6/30/2026
Jameson C.
7/7/2026
Product Page this Question was Asked From
Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 4-Way and 7-Pole Connector - 7' Long
- Custom Fit Vehicle Wiring
- 5th Wheel and Gooseneck Wiring
- Vehicle End Connector
- 7 Blade
- Plug and Lead
- Plug-In
- Hidden
- CURT
more information >
Featured Help Information
Instructions
Continue Researching
- Search Results: flatbed light kit
- Video: Let’s Check Out the EZ Lock Gooseneck Coupler Lock Combo
- Shop: Blaylock EZ Lock Gooseneck Coupler Lock - Bulldog/Stallion/Superior/T.E.M. Gooseneck Couplers
- Shop: EZ Lock Gooseneck Coupler Lock Combo - Bulldog/Stallion/Superior/T.E.M. Gooseneck Couplers
- Shop: Blaylock EZ Lock Gooseneck Coupler Lock - Bulldog/Stallion/Superior/T.E.M. Gooseneck Couplers
- Shop: Electric Trailer Brake Assembly - Self-Adjusting - 12" - Left Hand - 5,200 lbs to 7,000 lbs
- Search Results: 198 inch od trailer bearings races seals caps
- Shop: 2" Lubed Dust Cap & Rubber Plug - 1.99" x 1.40" x 1.18" - Qty 1
- Search Results: trailer hitch
- Shop: Trailer Hitch
- Article: Trailer Wiring Diagrams
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Search Results: trailer tires and wheels
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Shop: Trailer Wiring
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Search Results: trailer wiring
- Q&A: Does etrailer Carry Furrion Chill Cube w/ Heat Pump to Replace Dometic Duo-Therm
- Article: How to Measure for Trailer Hitch Drop
- Shop: Suspension Enhancement
- Article: How to Measure Your Trailer Wheel Bolt Pattern
- Shop: Brake Controller
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Search Results: trailer jack
- Video: Measuring To Choose The Right Trailer Axle
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: Installation Time for Blue Ox BX1128 Flat Tow Base Plate Kit for 2016 Jeep Grand Cherokee
- Shop: Gooseneck Hitch
on Custom Fit Vehicle Wiring
Jameson C.
10/22/2025
Hey Sammy, what ended up happening with the bearing caps on your car hauler? Were you able to figure out if the size or grease level was the issue? Your update could make it easier for others dealing with the same problem.