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Old 07-08-2019, 08:07 AM   #1
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Invisibrake

Ok, to correctly adjust my braking system on our toad I need your input on what to look for when pulling. Now I have pulled a bigger trailer with a braking system and I could feel it apply at stops, it that same feeling what I'm looking for?? Our current pull car is a tiny Fiat that weighs 2300 lb.
Our rig is 18000 empty. Our braking system is Invisi brake. It has a knob to adjust cable travel to increase braking. Thanks
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Old 07-10-2019, 04:56 AM   #2
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The knob adjusts air pressure to the actuating cylinder. To adjust for weight of vehicle; Pull the Emergency Brake Away pin out then with someone in motorhome and second person watching the toad drive motorhome forward slowly and adjust the Invisbrake to point where toad wheels start to slide then reduce pressure until wheels just start rolling.
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Old 07-10-2019, 05:12 AM   #3
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You can do the test with the breakaway but make sure to not leave it out for more than 5 minutes since the compressor and vacuum pump will continue to run the whole time. If you pull the pin with the coach disconnected and the TOAD brake pedal moves and the brake lights come on you should be fine. Doesn't take a lot.

Hopefully you have a brake pedal indicator light in the coach. That is the best indicator that all is well and brakes are being applied. It will light when the TOAD pedal is depressed. I wouldn't be without one.

When you run the engine on a TOAD with vacuum assist, the vacuum in the brake reservoir persists for a while. When I first hook up and apply the brakes I can feel the TOAD pulling back on the coach a little and then the residual vacuum goes away after a few soft pedal pushes in the coach. After that the Invisibrake will supply vacuum but it starts out with far less and builds as the brakes are applied, essentially not proportional but progressive actuation. The pedal won't go as far down with Invisibrake as it does when running the Toad engine since there is less vacuum to help the brakes.
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