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Old 10-03-2016, 09:20 PM   #11
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Year: 1991
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Chassis: International S3800
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Originally Posted by NowhereFast View Post
There's a reason big rigs have air brakes!

the BIGGEST reason is because of the coupling to the trailer...

if all of the brakes were hydraulic it wouldve been a lot harder to couple and uncouple a trailer if all on one system.. imagine having to bleed hydraulics every time you hitched up

one couldve used electrically actuated hydraulic brakes... however brake controller technology didnt exist when big rigs were conceived and air brakes designed...

-Christopher
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Old 10-03-2016, 09:29 PM   #12
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6. Air Brakes - They just plain Sound Bad-Ass!!
Can't argue with that one!
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Old 10-03-2016, 09:58 PM   #13
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Location: Prince George, BC, Canada
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1 question, Was the hydraulic brakes vacuum boosted or Hydro boosted?
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Old 10-04-2016, 05:18 AM   #14
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Negative for hydraulic brakes- Most brake fluid is hyrdoscopic, which lowers the boiling point of the fluid. See this white paper in it.
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Old 10-04-2016, 06:54 AM   #15
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Join Date: May 2009
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Year: 1991
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Chassis: International S3800
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Originally Posted by Tootalltechie View Post
1 question, Was the hydraulic brakes vacuum boosted or Hydro boosted?
they are hydro boost with a backup electric motor that operates the assist in case of engine failure.
-Christopher
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Old 10-04-2016, 08:47 AM   #16
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Location: Houston, Texas
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Originally Posted by cadillackid View Post
they are hydro boost with a backup electric motor that operates the assist in case of engine failure.
-Christopher

That is the same system I am building onto my rig. The master is from a mid sized International truck. Hydro with 4 wheel disks is plenty for my little 8000 pound shorty.
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Old 10-04-2016, 11:24 AM   #17
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Join Date: May 2009
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i stand corrected on my hydro brakes in the new bus.. im told all bluebird internationals are 4 wheel disc.. I couldnt tell exactly on my rears but thought it almost looked drum.. but I guess in 2000 it was not dont that way anymore so I probably have disc on that hydro bus.
-Christopher
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