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Old 06-18-2022, 06:25 PM   #1
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Towed brake systems for a hydro boosted vehicle

Can a vehicle with a hydro boost (not vacuum) brake system be flat towed with a supplemental brake system for towed vehicle brake assistance?
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Old 06-18-2022, 07:24 PM   #2
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The accurate answer is in the owners manual under "recreational towing". If the owners manual does not have such a section, it's implied the vehicle is unsuitable for flat-towing.
Sure, there are online flat-towing guides, but I have seen glaring errors in them.
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Old 06-18-2022, 07:25 PM   #3
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I would think so , because the first part of the set up of my toad brake system , is cycling the brake pedal , a number of times , to bleed off the vacuum ;so the toad brake system is working without assist .
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Old 06-19-2022, 06:27 AM   #4
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Quote:
Originally Posted by Ray,IN View Post
The accurate answer is in the owners manual under "recreational towing". If the owners manual does not have such a section, it's implied the vehicle is unsuitable for flat-towing.
Sure, there are online flat-towing guides, but I have seen glaring errors in them.
The vehicle can be flat towed. I got that verified. I just was not sure if having a hydro vs vacuum boost on the towed vehicle made any difference a supplemental brake system.

For example the Roadmaster Invisibrake (RMI) is not compatible with this vehicle. the RMI taps into the vacuum line of the booster. Whereas others like Brake Buddy do not. I will call the Sup Brake System tech lines tomorrow. Just don't know if there are any other gotchas for this towed vehicle. Make sense now?
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Old 06-20-2022, 06:01 AM   #5
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The RVI3 has settings to accommodate both conventional vacuum boosted and hydro boosted systems. The adjustment sets the amount of force the unit applies when braking based on whether the power brakes are active, or if it’s a dead pedal, so to speak. Link to the user manual: https://drive.google.com/file/d/1-I2...DQCkmfr2s/view
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Old 06-20-2022, 03:01 PM   #6
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The vehicle can be flat towed. I got that verified. I just was not sure if having a hydro vs vacuum boost on the towed vehicle made any difference a supplemental brake system.

For example the Roadmaster Invisibrake (RMI) is not compatible with this vehicle. the RMI taps into the vacuum line of the booster. Whereas others like Brake Buddy do not. I will call the Sup Brake System tech lines tomorrow. Just don't know if there are any other gotchas for this towed vehicle. Make sense now?
Yep, got it. It really helps when I learn the whole story.
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Old 06-20-2022, 04:49 PM   #7
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Isn't the hydroboost going to boost using the electric emergency booster motor when the brake pedal is pressed? Unless small vehicles don't have the motor, I don't know.
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Old 06-21-2022, 07:06 AM   #8
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I called Blue Ox on their Patriot 3 model. They said the unit does not care whether vacuum of hydro boost is the vehicle system.

One of the things that sticks in my mind is stopping power (extra) foot pressure needed when the vehicle engine is not operating. I am guessing the extra stopping power (engine off in tow) is created by the supplemental device with more mechanical pressure? Thoughts?
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