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05-09-2020, 09:24 AM
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#1
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Junior Member
Join Date: May 2020
Posts: 11
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1978 Holiday Rambler brakes
Hello All
Just purchased a 78 holiday rambler imperial 5000
The brake pedal doesnt stay up where it should
Braking from where the pedal rest is like braking in a newer vehicle with no brake fluid
The guy I got it from was raising it with his foot to get it to the top of its motion
If I do this or reach down there with my hand and raise it
the brakes just about put me though the windshield
So, the brakes work if the pedal gets to the top of the motion
What is causing the pedal to malfunction?
I read somewhere that the 79 model had Ford brake system
Does the 78 have ford too?
Thanks in advance
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05-09-2020, 09:31 AM
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#2
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Senior Member
Monaco Owners Club
Join Date: Nov 2015
Posts: 2,299
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My first guess would be the pedal return spring under the dash.
__________________
Steven & Laurie
2006 Moncaco Executive Ranier
Detrioit Series 60 (515HP), Allison 4000 series
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05-09-2020, 09:42 AM
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#3
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Senior Member
Join Date: Jul 2014
Posts: 35,441
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Pedal spring or look for a bellcrank or offset linkage between the pedal rod and power brake booster outside on the firewall..
Sometimes the pins freeze up. 
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05-09-2020, 09:54 AM
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#4
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Senior Member
Join Date: Aug 2012
Location: FL 33993
Posts: 308
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It might also be the master cylinder itself. It has a very strong spring in it that pushed the piston back to the starting position. That push would go through the booster, linkage and to the pedal to assist any spring that might be on the linkage or pedal.
If that master cylinder spring was damaged/weak there might not be enough force to assist in pushing the pedal all the way up.
.
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2007 Fleetwood Providence 39V
Allison 3000MH 7.5 Onan
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05-09-2020, 10:25 AM
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#5
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Junior Member
Join Date: May 2020
Posts: 11
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05-09-2020, 12:14 PM
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#6
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Senior Member
Join Date: Aug 2012
Location: FL 33993
Posts: 308
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You might also want to check the pivot point of that pedal to see if maybe it's sticking. Might just need a good cleaning and some lube.
Like others I was thinking it was more like a car where the pivot and linkage hung down from the dash. Yours appears to be exposed to whatever the wheels might kick up.
__________________
2007 Fleetwood Providence 39V
Allison 3000MH 7.5 Onan
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05-09-2020, 08:36 PM
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#7
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Senior Member
Join Date: Apr 2018
Location: North Central Florida
Posts: 830
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Wow, I like the old school pedal through the floor. What's underneath the floor? I imagine there is a return mechanism for that pedal underneath.
I'd love to see more pics of the rig!
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05-10-2020, 12:36 PM
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#8
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Junior Member
Join Date: May 2020
Posts: 11
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Quote:
Originally Posted by Brob
Wow, I like the old school pedal through the floor. What's underneath the floor? I imagine there is a return mechanism for that pedal underneath.
I'd love to see more pics of the rig!
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I just got it the other day
havent looked under there yet
That pedal pic and the pic I posted in new members
Are the only 2 pics I have took of it
I wil post more
Once I get more settled with it
__________________
1978 32' Holiday Rambler Imperial 5000
Dodge 440
Acquired May 5,2020
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05-24-2020, 02:07 PM
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#9
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Junior Member
Join Date: May 2020
Posts: 11
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__________________
1978 32' Holiday Rambler Imperial 5000
Dodge 440
Acquired May 5,2020
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05-24-2020, 05:27 PM
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#10
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Senior Member
Join Date: Apr 2018
Location: North Central Florida
Posts: 830
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hmmm, what's the spring with the looooong end on it?That looks a little suspect to me...
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05-25-2020, 10:13 AM
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#11
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Junior Member
Join Date: May 2020
Posts: 11
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Thats the same thing I thought
Any idea
What kind and size spring should be there
Quote:
Originally Posted by Brob
hmmm, what's the spring with the looooong end on it?That looks a little suspect to me...
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__________________
1978 32' Holiday Rambler Imperial 5000
Dodge 440
Acquired May 5,2020
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05-25-2020, 10:30 AM
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#12
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Senior Member
Join Date: Dec 2014
Posts: 1,666
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I’ve had a 1953 Chevy pickup with the “through the floor” brake pedal. It did have an external return spring. I think I remember you saying that this rig has a Dodge engine. If so, the entire chassis could be from Dodge, and shopping for antique Dodge truck parts might help you find something like the correct spring.
__________________
Mike
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05-25-2020, 10:46 AM
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#13
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Senior Member
Join Date: Dec 2014
Posts: 1,666
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__________________
Mike
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