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Old 01-07-2006, 10:18 AM   #15
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1966 26' Overlander
Phoenix , Arizona
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You are describing air in brake lines. Was there issues when bleeding the brakes after the calipers were rebuilt? Hydroboost systems are more difficult that vacuum boost.

Was the concern always there?
Or did it materalize after the brake work?

You could get new calipers installed and they bleed the system of all of the air and then you think the new calipers are the best thing. When in all reality the system had air in it and it needed bleeding.

You could spend some $ to have the system bled. If no air is found then go other directions. You will be out some $ but not as much as the caliper replacement.


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1966 Lincoln 4 door Convertible 462 4V 1971 Ford LTD Convertible 429 4V Phoenix ~ Yeah it's hot however it's a dry heat!
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Old 01-07-2006, 05:21 PM   #16
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Posts: 79
brake question


After following all the posts in this area (Brakes) I now I have a good job
on the calipers and on the rotors and feel certain I did a good job on the
bleeding of the lines.

There is the area of "hydroboost" that has been mentioned a couple of times.
Is this located or part of the vacuum system that is under the hood in the
front of the vehicle. I do have a service manual but haven't got out
to the MH and get the book to see if this is addressed in the manual. As I
said in an earlier post (Yesterday) I do feel that I should be able to skid
the tires on a gravel driveway. Whats your opinion on this idea for a brake

Thanks Mixednuts

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Old 01-07-2006, 06:36 PM   #17
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re brake booster question

I just looked up the Hydrobooster system in a 1991 P30 manual which
I have. It is probably very close to whats in the 1985 MH. Any way
it tells how to test it and trouble shoot and how to R and R if necessary. This will be a project for next spring or summer

Thanks again everyone.

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Old 01-07-2006, 08:02 PM   #18
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1986 34.5' Airstream 345
Louisville , Kentucky
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Glad you found the manual and some testing procedures for this system. I've never thought about a gravel driveway test but again if you feel it takes too much pedal pressure to stop then something is wrong.

FYI - Once we rebuilt our bakes (calipers, pads, turned rotors, new MC and bled all of the fuild) I've felt like the brakes have been fine in normal operation, stop and go traffic and even a few panic stops.

Steven Webster
1986 Airstream 345 Classic Motorhome
AIR 1760
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