Will Trailer Surge Brakes Apply When Travelling Down Hill
Updated 06/17/2026 | Published 10/02/2024
Question:
Do hydraulic brakes drag all the way down a hill? It seems like this will cause them to overheat.
asked by: Kevin C
Expert Reply:
Hey Kevin, this is a great question but basically it would take more force than cruising down a hill for the surge brake actuator to apply the trailer's brakes. Basically it would take you applying the trailer brakes down the hill. The great thing about surge brakes is that if for some reason the trailer brakes end up applying to hard it would pull the trailer back from the tow vehicle which would stop the braking action.
The only time there's a real issue is backing up the trailer up a hill. But in those situations there are reverse lock outs and free backing plate brake assemblies to combat that.
Daryl
6/17/2026
I have found it on long downhill grade, the trailer Blakes will apply lightly but not enough to pull back on the tow vehicle which causes the brakes to overheat by the time we get to the bottom of the hill.
Jameson C.
6/17/2026
Product Page this Question was Asked From
Dexter DX7.5L A-60L Surge Brake Actuator w Electric Lockout - Disc - 2" Ball - Primed - 7.5K
- Brake Actuator
- Surge Brake Actuator
- Farm Trailer
- Boat Trailer
- Construction Trailer
- Travel Trailer
- Utility Trailer
- Weld-On
- 7500 lbs GTW
- 2 Inch Ball Coupler
- 3 Inch Channel Tongue
- Disc Brakes
- Electric Lockout
- Dexter
more information >
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Jameson C.
12/22/2025
Hey Kevin, how did things go with your surge brake actuator on those downhill runs? Did the braking feel smooth without any drag or overheating? Your feedback could really help others wondering about the same setup.