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| Re: Vacuum Brake Lock [message #311761 is a reply to message #311760] |
Mon, 02 January 2017 11:58   |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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Senior Member |
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1st picture you have is the cruise control tranducer.(located just to passenger side of distributor). there is one item that is coming off of it, that I am not sure I recognize. it usually has speedometer cable in, and speedometer cable out, I only see one cable.
as for the brake lock:
the clean looking etched switch plate you have(the one that says "read warnings and operating instructions") , is just like the one I have disconnected on my coach. I do not think it is related to your "vacuum brake lock". the plate one, like on my coach, is electrical solenoid on the rear feeding brake line. Press the brake, hit the switch, and the electric soleniod holds the rear brake pressure. You release the switch and the solenoid should open up. I have a mechanical one on my vw dune buggy, that is similar, except I push a mechanical button right on the brake line on that that one.
it looks to me that device by your steering shaft, would be that vacuum brake lock device. I am guessing maybe the same as the electric version, except it used a vacuum solenoid? but that is my guess.
I personally have disconnected that brake lock on my GMC, it was old, not used, and I just could not trust it because I did not know the history of the device. I would think you may want to do the same.
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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| Re: [GMCnet] Vacuum Brake Lock [message #311770 is a reply to message #311760] |
Mon, 02 January 2017 15:21 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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I believe your getting the Hydraulic brake mixed up with cruse control
Vacuum.
Call me and I'll clarify them for you.
On Mon, Jan 2, 2017 at 8:34 AM, Russell Keith wrote:
> On the list of upgrades found for our coach "Harry", there is an item
> called "Vacuum Brake Lock". I assume it is some type of vacuum assisted
> parking
> brake, but I cannot find another GMC that has one, or any information
> about it. Does anyone have experience with this system? I think the
> following
> pictures show the system.
>
> http://www.gmcmhphotos.com/photos/data/7009/medium/What_is_this.jpg
>
> http://www.gmcmhphotos.com/photos/data/7009/medium/zoomed_in.jpg
>
> http://www.gmcmhphotos.com/photos/data/7009/medium/Found_
> this_switch_cover_in_a_box_in_the_GMC.jpg
>
> http://www.gmcmhphotos.com/photos/data/7009/medium/Vacuum_Brake_Switch.jpg
>
> http://www.gmcmhphotos.com/photos/data/7009/medium/
> Auxiliary_vacuum_booster.jpg
>
> http://www.gmcmhphotos.com/photos/data/7009/medium/side_
> view_auxiliary_vacuum_booster.jpg
>
> --
> Russell Keith
>
> 1978 Eleganza II
>
> Dunedin, Florida
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Vacuum Brake Lock [message #311776 is a reply to message #311770] |
Mon, 02 January 2017 16:37 |
Russell K.
Messages: 178
Registered: October 2016
Location: Dunedin, Florida
Karma: 4
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Senior Member |
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Thank you Jon, Ken, Matt, and JimK.
I'm still a newbie and have a lot to learn about our GMC.
This forum is definitely a good place to get answers.
Thanks again.
Russell
1978 Eleganza II, Dunedin, Florida
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| Re: [GMCnet] Brake Lock - Update [message #317119 is a reply to message #317104] |
Fri, 05 May 2017 14:00 |
Ek_Lektro
Messages: 167
Registered: March 2011
Karma: 2
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Senior Member |
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Jim K at Applied GMC sells one that looks a lot like this, and about the same price.
> Its a Mico Electric Activated Brake Lock.
> http://www.gmcmhphotos.com/photos/data/7009/medium/20170414_143413.jpg
>
> I found info on it here:
> http://gmcmotorhome.info/BRKLOCK.html
Looks like good quality,, but looked like a fair amount of install time (and we were VERY preoccupied with other jobs
at the time), so we didn’t go with this one...
But now that the dust has settled, i’m curious about the manual Brake Lock options out there
(not electric, and quite a bit less expensive?).
I’d imagine that the lines for one of those units could be plumbed right up through the hole
where the old parking brake was mounted?
But one main question would be how securely would the unit need to be mounted?
For example, how much finger/hand pressure is required to lock and unlock?
We wouldn’t want to be busting brake lines while twisting the thing, hmmmm…
cheers
Greg / Los Angeles / y Tijuana tambien :)
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