Adding Brakes to Utility Trailer with Custom 3,500 lb Axle with 6 on 5-1/2 Bolt Pattern
Question:
I have a 4x6 utility trailer that has a custom 3500k axle with 6x5.5 bolt pattern. I use it for camping so it weighted down pretty good. Im trying to figure out what the best brake setup would be. The axle has mounting points for brakes and I would like to find something that is not to difficult to install as I am not too familiar with brake systems.
asked by: Nick S
Expert Reply:
Since you're looking for a relatively easy installation and your camper only has a single 3,500 lb axle, your best option is to add electric brakes. These will work well to provide safe and reliable breaking on your fully loaded trailer and do not require major modifications like adding a hydraulic brake actuator or running hydraulic brake lines, which is the case when adding drum or disc hydraulic brakes to a trailer.
If you already have hubs with integrated drums on your trailer, you can just add brake assemblies # AKEBRK-35-SA. These brakes mount on a 4 bolt mounting flange, like # 4-35, with bolt holes 2-7/8" apart on center. So, as long as yours share the same specs, the recommended brakes will work. To wire these, you can use # 10-1-1 (per foot), you'll need enough length to go across from one assembly to the the other and to run up to the junction box, which I'll mention next.
A 7-way connector on both the vehicle and trailer are necessary as well as a brake controller. To upgrade the trailer's 4-way connector, you can use # HS381-9000, this includes a junction box, which makes wiring your trailer much easier. For a brake controller, I recommend the Curt Echo # C51180, because it's Bluetooth-enabled and does not require any additional wiring, like traditional brake controllers. All you do is plug it between your vehicle and trailer's 7-way and use your smartphone to monitor and control it. To upgrade an existing 4-Pole to a fully functioning 7-way on your vehicle (if you don't already have one), you can use # ETBC7.
You'll also need to install a breakaway kit # 3802308 to ensure the brakes are applied in the event your trailer should ever disconnect from your tow vehicle.
If you currently only have idler hubs on your trailer, you'll need to replace them with hubs/drums. However, since it's a custom-made axle, some of the components that are considered "standard" on 3,500 axles, may be different on yours. Therefore, you'll need to confirm what spindle it uses by measuring the portion of the spindle on which the bearings and seal ride. I've attached a help article that you can use as a resource. If your axle uses a #84 spindle, like the one in the attached photo, then you can replace idler hubs with # AKHD-655-35-EZ-K.
Disc brake kits for 3,500 lb axles, like the # T2HRCM10DAC you were checking out at are only available with a 5 on 4-/12 bolt pattern, so going that route would also involve replacing your hubs, tires and wheels to match, which is not ideal.
I've linked additional Help Articles that I believe you will find useful at the bottom of the page for you.
![Carla M](https://images.etrailer.com/static/images/catg/people/521_tn.jpg)
Products Referenced in This Question
Bright Way Push-to-Test Trailer Breakaway Kit with 1-Amp Charger and 5 Ah Battery - Top Load
- Trailer Breakaway Kit
- Kit with Charger
- Top Load
- Single-axle
- Tandem-axle
- LED Tester
- 1 Amp Charger
- Battery Included
- 5 Ah
- Bright Way
more information >
Brake Mounting Flange for 2-3/8" Round Axle
- Accessories and Parts
- Trailer Brakes
- Disc Brakes
- Electric Drum Brakes
- Hydraulic Drum Brakes
- Brake Mounting Flange
- 10 Inch
- 2-3/8 Inch Diameter Axle
- Redline
more information >
etrailer Electric Trailer Brakes - Self-Adjusting - 10" - Left/Right Hand Assemblies - 3.5K
- Trailer Brakes
- Electric Drum Brakes
- Standard Grade
- Self Adjust
- 10 x 2-1/4 Inch Drum
- 3500 lbs Axle
- etrailer
more information >
Easy Grease Trailer Hub and Drum Assembly for 3.5K Axles - 10" - 6 on 5-1/2 - Pre-Greased
- Trailer Hubs and Drums
- Hub with Integrated Drum
- Easy Grease
- EZ Lube
- Pre-Greased
- L68149
- L44649
- For 3500 lbs Axles
- 1/2 Inch Stud
- 6 on 5-1/2 Inch
- 14-1/2 Inch Wheel
- 15 Inch Wheel
- 16 Inch Wheel
- 16-1/2 Inch Wheel
- etrailer
more information >
Curt Echo Wireless Brake Controller - 7-Way Plug Mount w/ Bluetooth App - 1 to 2 Axle - Proportional
- Trailer Brake Controller
- Proportional Controller
- Hidden
- Up to 2 Axles
- Smartphone Display
- CURT
more information >
Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Accessories and Parts
- Trailer Brake Controller
- Installation Kits
- etrailer
more information >
Wiring Kit for Hydrastar Electric Over Hydraulic Actuators
- Accessories and Parts
- Brake Actuator
- Disc Brakes
- Hydraulic Drum Brakes
- Wiring
- Hydrastar
more information >
Product Page this Question was Asked From
Dexter Premier Disc Brake Kit - 10" Hub/Rotor - 5 on 4-1/2 - Dacromet - 3,500 lbs
- Trailer Brakes
- Disc Brakes
- Marine Grade
- 5 on 4-1/2 Inch
- Hub and Rotor
- 3500 lbs Axle
- 14 Inch Wheel
- 14-1/2 Inch Wheel
- 15 Inch Wheel
- Dexter
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Article: Most Popular Wheel Bearings
- Article: Trailer Drum Brakes vs. Disc Brakes: Making the Decision
- Article: How to Bleed Your Trailer Surge Brakes
- Q&A: Replacement Bearing Kit and Brakes for a 2003 Boat Trailer with 3,500 lb Axles
- Article: Breakaway Kit Installation for Single and Dual Brake Axle Trailers
- Q&A: How to Determine if Trailer has 84 Spindle to Pick Out Replacement
- Q&A: Will 14" Diameter Trailer Wheels fit On The DeeMaxx Disc Brake Kit # DE66YR?
- Q&A: Replacement Rotors And Brake Calipers For A 2015 Load Rite Boat Trailer
- Article: Adding Electric Over Hydraulic Disc Brakes
- Q&A: Replacement Hub/Rotor and Bearings for Tie Down Engineering TDE46245
- Article: Parts Needed to Add Hydraulic Disc Brakes to a Trailer
- Q&A: Replacement Bolt-On Disc Brake Actuator for Tie Down 70E
- Q&A: How to Convert a Trailer with Surge Brakes to Electric Over Hydraulic Brakes
- Article: 5 Tell-Tale Signs It’s Time to Replace Your Trailer’s Leaf Springs