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Service & Repair Procedures includes body/frame repair & painting Useful technical content, information or questions applicable to many or all of our truck models; mechanical, electrical, body & paint, tire, restoration, whatever...

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Old 10-04-2016, 07:26 PM   #1
Jason Mills
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Dot 5 brake fluid?

Has anyone used it successfully in their truck?

I tried using it 20 years ago and never got a brake peddle that was satisfactory. I have heard that the military uses it or has used it in the past. Is this true?

Thanks,
Jason
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Old 10-05-2016, 12:36 PM   #2
Kevin in Ohio
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I'm using it in my modified but it has Hydroboost and 4 wheel discs on it. It'll put you through the windshield. The only thing I noticed was the fittings have to be tighter than normal to prevent any leaks. Other than that, no difference so far other than no paint damage. ;)

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Old 10-05-2016, 09:46 PM   #3
Jason Mills
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Thanks Kevin for sharing your experience.

Wow! "Craftsmanship" does not describe the artistry involved in that picture.

The fact that it needs a tighter connection on the brake lines makes me wonder if I would have trouble with the wheel cylinders leaking..
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Old 10-05-2016, 10:42 PM   #4
Kevin in Ohio
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Quote:
Originally Posted by Jason Mills View Post
Thanks Kevin for sharing your experience.

Wow! "Craftsmanship" does not describe the artistry involved in that picture.

The fact that it needs a tighter connection on the brake lines makes me wonder if I would have trouble with the wheel cylinders leaking..
I used all over the counter rebuilt calipers and have had no leaks in 4 years. No leaks or retighten on any of the lines either. I used all stainless lines and fittings too.

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Old 02-04-2017, 08:42 PM   #5
Matthew Ziegler
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dot 5

I used the purple military surplus dot 5 in my m37 for a few years, had to bleed the brakes at least 4 times to get all the air out. When I switched over to a Chevy master cylinder and disc brakes the lid on the mc. said use only dot 3,so I flushed the lines and switched to 3. Motorcycle mechanic friend of mine says Harleys use dot 5, he claims it has a much higher boiling point.
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Old 02-17-2017, 02:47 PM   #6
bmhenry
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DOT 3&4 can be "mixed" without issue. However DOT 5 cannot be mixed and needs to be stand alone. It does indeed have a higher boiling point and is what my Harley requires as well.
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Old 07-12-2017, 04:39 AM   #7
wecluis
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I also use DOT 5 also, and no problems/leaks whatsoever.
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