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Old 03-11-2018, 08:27 AM   #1
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Exhaust Brake

I have a 2008 Allegro Bay 37 QDB, Diesel with Allison transmission and freight liner chassis. It is a front diesel with Cummins 340.
Do I leave my exhaust brake on at all times? I have read that only to be used on hilly roads and incline.
When used today on flat highway, as soon as I tapped brake, it engaged, did not realize such a sudden braking in speed.
Any assistance is appreciated.
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Old 03-11-2018, 12:42 PM   #2
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Quote:
Originally Posted by razman95 View Post
I have a 2008 Allegro Bay 37 QDB, Diesel with Allison transmission and freight liner chassis. It is a front diesel with Cummins 340.
Do I leave my exhaust brake on at all times? I have read that only to be used on hilly roads and incline.
When used today on flat highway, as soon as I tapped brake, it engaged, did not realize such a sudden braking in speed.
Any assistance is appreciated.
I left my Allegro RED 340 exhaust brake on almost all the time (except on wet roads) to assist with braking and do the same with the two stage compression brake on the 380hp Phaeton. The RED was programmed to start slowing as soon as you let off the accelerator, but the Phaeton is set to activate with a tap on the brakes.
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Old 03-11-2018, 01:08 PM   #3
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Just finished Camp Freightliner and this is one of the things we discussed. It is just as Lt Dan said. Don't leave it on in slick roads including rain, ice, and snow.
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Old 03-11-2018, 06:53 PM   #4
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Our Phaeton on a FreightLiner would engage the engine brake when the accelerator was released as well as the brake..I believe they all do this if your foot is completely off the pedal and it’s on. It also lights the brake lights.
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Old 03-12-2018, 08:49 AM   #5
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Quote:
Originally Posted by razman95 View Post
I have a 2008 Allegro Bay 37 QDB, Diesel with Allison transmission and freight liner chassis. It is a front diesel with Cummins 340.
Do I leave my exhaust brake on at all times? I have read that only to be used on hilly roads and incline.
When used today on flat highway, as soon as I tapped brake, it engaged, did not realize such a sudden braking in speed.
Any assistance is appreciated.
I use mine mostly on steep grades when I am concerned about over using the service brakes. It kicks in when I let up on the accelerator and appears to over rev the engine slowing down more than needed.
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