blew a brake line, got a ? - Ford Powerstroke Diesel Forum
 
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post #1 of 2 Old 10-04-2013, 05:12 AM Thread Starter
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blew a brake line, got a ?

so im test drivin the bus the other day and it feels great. but wheni get back home i thought i might see if i could get the rear wheels to light up so im light-medium on the brakes and i give it throttle...

blows a pinhole in the small line from driverside front wheel flex hose to a distribution block 2 ft away on the frame.

pedal drops to floor. literally no pedal at all, no brakes at all...

so my question is about the brake fluid distribution. does this chassis have a fail safe like most vehicles? i know my 97 escort will seperate the system in case a line blows. drivers front and pass rear are on one half and the pass front and drivers rear are on the other.

96 E350 Cool Bus 7.3 - party bus, minor mods
92 Mustang LX 5.0 - minor mods 13.9@99.5
87 Astro 4.3 - the workhorse... lol
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post #2 of 2 Old 10-10-2013, 08:07 AM
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All this is an assumption that your brakes are the same as ours on the truck frames:

Fronts and rears are on separate circuits divided by a wiper seal between the two pistons on brake plunger inside of the master cylinder. The wiper seals do wear out and allow pressure to move back or forth or to leak back into the booster (I would imagine that your bus is on the SD frame and not the standard OBS frame. With this I would also imagine that you have Hydro-Brakes and not Vacuum Boosted brakes). Your rears may be shot as 70+% of your braking is from the front brakes losing them is a big deal. If you set your parking brakes can you then feel resistance in the pedal?

Matt
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