Home » Public Forums » GMCnet » [GMCnet] Hydroboost issues?
| [GMCnet] Hydroboost issues? [message #310473] |
Thu, 17 November 2016 11:53  |
Sammy Williams
Messages: 522
Registered: August 2010
Karma: -2
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On the Mopar (thats Chrysler Inc cars) list they are discussing the GMC
motorhome as one surfaced at an auction along with an Imperial. They claim
GMC got sued over the motorhomes "hydroboost" system for its brakes.
"They got sued because of the hydroboost brakes. Some family lost a fan belt
and the brakes went with it. The coach went backwards down a hill and so
on. Googled and can't find it??"
Is one entry they wrote. Is there any history on the suit? I can't find
anything, and if its false, id rather not see false info spread about GMC
and its motorhomes. I see far to many of them operating without any issues.
Sammy Williams
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| Re: [GMCnet] Hydroboost issues? [message #310475 is a reply to message #310473] |
Thu, 17 November 2016 12:14  |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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Do not think any gmc ever came with hydroboost. However if the engine dies, I can see the danger in not being able to hold the brakes if the engine quits on an incline due to using up the vacuum boost. There are ways to help that, but it is a hazzard. I seen a picture of a coach that almost went down the side of a cliff a few years ago from that problem.
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] Hydroboost issues? [message #310480 is a reply to message #310473] |
Thu, 17 November 2016 13:19 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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I expect they're actually referring to SOBs with hydroboost. My Itasca - on a P 30 chassis - had hydroboost brakes as standard.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Hydroboost issues? [message #310491 is a reply to message #310473] |
Thu, 17 November 2016 16:29 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Your going to face similer problems on the standard unit if you do not know
what to do when it happens.
The Hydro Boost units have at least two pumps to stop when things like this
happens, same for Vacuum assisted ones.
Also keep in mind, there are two belts that are on that pulley, so it is BS
I do't think that law suit went anywhere as there was nothing wrong with
its operation, just an operator fault.
On Thu, Nov 17, 2016 at 9:53 AM, Sammy Williams wrote:
> On the Mopar (thats Chrysler Inc cars) list they are discussing the GMC
> motorhome as one surfaced at an auction along with an Imperial. They claim
> GMC got sued over the motorhomes "hydroboost" system for its brakes.
>
> "They got sued because of the hydroboost brakes. Some family lost a fan
> belt
> and the brakes went with it. The coach went backwards down a hill and so
> on. Googled and can't find it??"
>
> Is one entry they wrote. Is there any history on the suit? I can't find
> anything, and if its false, id rather not see false info spread about GMC
> and its motorhomes. I see far to many of them operating without any issues.
>
> Sammy Williams
> _______________________________________________
> 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] Hydroboost issues? [message #310498 is a reply to message #310473] |
Thu, 17 November 2016 17:14 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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Jim, the Itasca had one (count it, one) pump, the combo power steering/hydroboost pump. I replaced both it and the hoses because of that... they were original from sometime in the early 80s. Never had a problem with the system.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Hydroboost issues? [message #310513 is a reply to message #310498] |
Thu, 17 November 2016 19:35 |
Hal StClair
Messages: 971
Registered: March 2013
Location: Rio Rancho NM
Karma: -12
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I think Jim is referring to 'pedal' pumps Johnny. With the large accumulator the HB's are 'supposed' to have at least two pedal pumps. Hope I never find out.
Hal
"I enjoy talking to you. Your mind appeals to me. It resembles my own mind, except you happen to be insane."
1977 Royale 101348,
1977 Royale 101586, Diesel powered,
1974 Eagle Bus 45',w/slideout,
Rio Rancho, NM
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| Re: [GMCnet] Hydroboost issues? [message #310534 is a reply to message #310473] |
Fri, 18 November 2016 08:11 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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Oh, OK. My 23' has two feet of 4 inch pipe as a reservoir with a GM vacuum pump. The 26' has the 'spensive vacuum pump. Both will continue to stop as long as the battery holds out. I modified the 23' after it got hot and vapor locked going up Culowee mountain and I nearly tucked it in a dropoff getting it stopped. The following Monday I got the pump from Pic A Part and made up the reservoir.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Hydroboost issues? [message #310555 is a reply to message #310491] |
Fri, 18 November 2016 11:43 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Some how my message was deleted.
Anyway, the PS pump that support the Hydro Boost system has two belts, so I
do not buy that story of the belt breaking , causing the issue.
As John Sharp mentioned, there is a back up if you know how to use it when
it happens.
These things are some of what we teach at the convention seminars.
On Thu, Nov 17, 2016 at 2:29 PM, Jim Kanomata wrote:
> Your going to face similer problems on the standard unit if you do not
> know what to do when it happens.
> The Hydro Boost units have at least two pumps to stop when things like
> this happens, same for Vacuum assisted ones.
> Also keep in mind, there are two belts that are on that pulley, so it is BS
> I do't think that law suit went anywhere as there was nothing wrong with
> its operation, just an operator fault.
>
> On Thu, Nov 17, 2016 at 9:53 AM, Sammy Williams wrote:
>
>> On the Mopar (thats Chrysler Inc cars) list they are discussing the GMC
>> motorhome as one surfaced at an auction along with an Imperial. They claim
>> GMC got sued over the motorhomes "hydroboost" system for its brakes.
>>
>> "They got sued because of the hydroboost brakes. Some family lost a fan
>> belt
>> and the brakes went with it. The coach went backwards down a hill and so
>> on. Googled and can't find it??"
>>
>> Is one entry they wrote. Is there any history on the suit? I can't find
>> anything, and if its false, id rather not see false info spread about GMC
>> and its motorhomes. I see far to many of them operating without any
>> issues.
>>
>> Sammy Williams
>> _______________________________________________
>> 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
>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Hydroboost issues? [message #310558 is a reply to message #310555] |
Fri, 18 November 2016 11:54 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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There is a lot to be said for having a well tuned engine that does not die
when you take your foot off the pedal, and a good maintence schedule to
address belts, hoses, brakes, tires, batteries, and other critical systems.
To say nothing about keeping your fuel tanks nearly full. Well maintained
vehicles do not stall as a matter of normal operation. If it does stall,
Why? Find it and fix it so it does not. If it really worries you, then add
back up vacuum pump, or hydraulic pressure accumulator that provides an
additional layer of security. Just don't forget, the more complex a system
becomes, the more failure prone it becomes. Just ask NASA.
Jim Hupy
Salem, OR
78 GMC Royale 403
On Fri, Nov 18, 2016 at 9:43 AM, Jim Kanomata wrote:
> Some how my message was deleted.
> Anyway, the PS pump that support the Hydro Boost system has two belts, so I
> do not buy that story of the belt breaking , causing the issue.
> As John Sharp mentioned, there is a back up if you know how to use it when
> it happens.
> These things are some of what we teach at the convention seminars.
>
> On Thu, Nov 17, 2016 at 2:29 PM, Jim Kanomata
> wrote:
>
>> Your going to face similer problems on the standard unit if you do not
>> know what to do when it happens.
>> The Hydro Boost units have at least two pumps to stop when things like
>> this happens, same for Vacuum assisted ones.
>> Also keep in mind, there are two belts that are on that pulley, so it is
> BS
>> I do't think that law suit went anywhere as there was nothing wrong with
>> its operation, just an operator fault.
>>
>> On Thu, Nov 17, 2016 at 9:53 AM, Sammy Williams
> wrote:
>>
>>> On the Mopar (thats Chrysler Inc cars) list they are discussing the GMC
>>> motorhome as one surfaced at an auction along with an Imperial. They
> claim
>>> GMC got sued over the motorhomes "hydroboost" system for its brakes.
>>>
>>> "They got sued because of the hydroboost brakes. Some family lost a fan
>>> belt
>>> and the brakes went with it. The coach went backwards down a hill and so
>>> on. Googled and can't find it??"
>>>
>>> Is one entry they wrote. Is there any history on the suit? I can't find
>>> anything, and if its false, id rather not see false info spread about
> GMC
>>> and its motorhomes. I see far to many of them operating without any
>>> issues.
>>>
>>> Sammy Williams
>>> _______________________________________________
>>> 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
>>
>
>
>
> --
> Jim Kanomata
> Applied/GMC, Fremont,CA
> jimk@appliedairfilters.com
> http://www.appliedgmc.com
> 1-800-752-7502
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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