Brake Loss

[engcsm]

Loss most of my brakes on my 94 dually a few days ago. I was in heavy traffic and when I applied the brakes, at 40 MPH, the brake light located to the right of the steering wheel on the dash lit up and the pedal suddenly became hard,. . much like it does if you use the brakes too much when you back up, especially with an automatic. I really had to lay on the brakes to stop as it was like stopping a car with out the engine running. I think that I am lucky that I wasn't running loaded at the time. Thought that my vacuum pump or my brake booster had gone out, but it turned out to be the vacuum line that goes into the cab on the driver's side had broken. Checked the rest of the plastic lines and found some that were brittle. Hard to believe that such a small leak could affect the braking system so much. I think later models,. . those after 94,. . develop more vaccuum, but I don't know if they can withstand a broken line without the same effects.

 

[Missouri Mule]

Haven't heard of more vacuum with 95/96 models but either way(the same or more)a vacuum leak will cause problems.
The 97 and later models went to a hydraulic Power brake booster powered by the power steering pump/power steering fluid.
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I have seen a 97 what a easy reach under the master cylinder/booster to the fuel filter. #ad
!

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Bill Thomas
Missouri Mule - 96 Wht 4X4 ST CC,5 spd, 3. 54, 8 ft bed, 1 ft high cheater boards.
99 Freightliner bl/wht FL60 ISB-5. 9 24v,215 hp,520 tq,6 spd, 3. 59 nsr,16 ft box, 19. 5 tires,Wt/gvw 11,000/23000