Re: Dash Vent System
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- Posts: 20
- Joined: Mon Oct 28, 2019 10:03 am
Re: Dash Vent System
'
So I it seems I may have a plumbing issue and maybe a vacuum pump issue. Right now I need to resolve the plumbing issue. Anyone have knowledge on where to start my investigation. When I set the air flow to upper/lower the system seems to work fine. I can actually watch the actuator move under the dash and feel the air begin to blow and it holds a vacuum. When I switch to upper, defrost, or recirculation the vacuum is lost and the actuator moves back up and I have no air flow.
Thx,
Joe,1997 Saraha 3550, 3126/300, 6 Sp'
So I it seems I may have a plumbing issue and maybe a vacuum pump issue. Right now I need to resolve the plumbing issue. Anyone have knowledge on where to start my investigation. When I set the air flow to upper/lower the system seems to work fine. I can actually watch the actuator move under the dash and feel the air begin to blow and it holds a vacuum. When I switch to upper, defrost, or recirculation the vacuum is lost and the actuator moves back up and I have no air flow.
Thx,
Joe,1997 Saraha 3550, 3126/300, 6 Sp'
Re: Dash Vent System
'Joe,
When there is no vacuum, the system defaults to defrost, all air goes
to the windshield. That position should not require any vacuum.
Re-circulation should require the most vacuum. In any case, from what
you described earlier, your pump is toast, so replace the pump and
then you should be able to pull enough vacuum to hear where the leak
is coming from. Or you can put a fog/smoke machine on it and you will
easily be able to see where the leaks are.
John
'95 Safari Serengeti 38ft, Cummins C8.3-300, Allison
6spd
On 9/14/19, jumpnjoe59@... [Safarifriends]
wrote:
When there is no vacuum, the system defaults to defrost, all air goes
to the windshield. That position should not require any vacuum.
Re-circulation should require the most vacuum. In any case, from what
you described earlier, your pump is toast, so replace the pump and
then you should be able to pull enough vacuum to hear where the leak
is coming from. Or you can put a fog/smoke machine on it and you will
easily be able to see where the leaks are.
John
'95 Safari Serengeti 38ft, Cummins C8.3-300, Allison
6spd
On 9/14/19, jumpnjoe59@... [Safarifriends]
wrote:
'>
>
> So I it seems I may have a plumbing issue and maybe a vacuum pump issue.
> Right now I need to resolve the plumbing issue. Anyone have knowledge on
> where to start my investigation. When I set the air flow to upper/lower the
> system seems to work fine. I can actually watch the actuator move under the
> dash and feel the air begin to blow and it holds a vacuum. When I switch to
> upper, defrost, or recirculation the vacuum is lost and the actuator moves
> back up and I have no air flow.
>
>
> Thx,
>
>
> Joe,1997 Saraha 3550, 3126/300, 6 Sp
>
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- Posts: 791
- Joined: Thu Jul 27, 2000 11:10 am
Re: Dash Vent System
'Joe,I found these worked perfectly for my 1998 Sahara as well as my 2000 Trek.
https://www.amazon.com/gp/product/B00UAX1JSO/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Gary'98 Sahara 3006 300CAT
'
https://www.amazon.com/gp/product/B00UAX1JSO/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Gary'98 Sahara 3006 300CAT
'
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- Posts: 167
- Joined: Thu Oct 31, 2019 8:49 pm
Re: Dash Vent System
'This should provide some options:
https://www.amazon.com/s?k=12v+miniature+vacuum+pump&ref=nb_sb_noss
Tom Masterson1998 Serengeti 3706300HP Cat, Allison 3060'
https://www.amazon.com/s?k=12v+miniature+vacuum+pump&ref=nb_sb_noss
Tom Masterson1998 Serengeti 3706300HP Cat, Allison 3060'
Tom and Pris Masterson, w/ Buddy the 18 year old Siamese cat.
1998 Serengeti 3706
300hp Cat 3126, Allison 3060
900 Watts of Solar
17cf, Fisher & Paykel residential Refrigerator
Dragging four telescopes around the US seeking dark skies.
1998 Serengeti 3706
300hp Cat 3126, Allison 3060
900 Watts of Solar
17cf, Fisher & Paykel residential Refrigerator
Dragging four telescopes around the US seeking dark skies.
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- Posts: 20
- Joined: Mon Oct 28, 2019 10:03 am
Re: Dash Vent System
'Thanks again for all rsponses. I have ordered a pump and will see what that brings.'
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- Posts: 2
- Joined: Tue Sep 10, 2019 12:34 pm
Re: Dash Vent System
'Received the new vacuum pump, https://preview.tinyurl.com/yyxq3p4a , don't know how long this will work but for now it is working as I think it should. I have had this MH for two years and have never heard the pump shut off!! The defroster still does not blow air. I will have to investigate that another time. Thanks to all for the suggestions and input.
Joe, 1997 Sahara 3550, 3126/300hp, 6 spd'
Joe, 1997 Sahara 3550, 3126/300hp, 6 spd'
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- Posts: 355
- Joined: Mon Jul 16, 2007 2:10 pm
Re: Dash Vent System
'
Joe,
Are you aware that my drawing for the dash A/C is in the files section and includes both electrical and vacuum?
Jim Exler, Nampa, ID
On 9/17/2019 7:14 PM, Sarah George jumpnjoe59@... [Safarifriends] wrote:
Virus-free.
www.avg.com
'
Joe,
Are you aware that my drawing for the dash A/C is in the files section and includes both electrical and vacuum?
Jim Exler, Nampa, ID
On 9/17/2019 7:14 PM, Sarah George jumpnjoe59@... [Safarifriends] wrote:
Received the new vacuum pump,
https://preview.tinyurl.com/yyxq3p4a , don't know how long this will work but for now it is working as I think it should. I have had this MH for two years and have never heard the pump shut off!! The defroster still does not blow air. I will have to investigate
that another time. Thanks to all for the suggestions and input.
Joe, 1997 Sahara 3550, 3126/300hp, 6 spd
Virus-free.
www.avg.com
'
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- Posts: 20
- Joined: Mon Oct 28, 2019 10:03 am
Re: Dash Vent System
'Yes...I have looked at it in the past. I just have trouble putting the drawings to the physcal location within the MH. I will play some more this weekend. You have a bunch of great documentation out there....I think I speak for all when I say we appreciate all the time and effort you guys put into the documentation that is out there.
Joe'
Joe'
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- Posts: 6
- Joined: Wed May 15, 2019 1:35 am
Re: Dash Vent System
' I just replaced my defroster duct hoses. Originals were rotted to pieces. Yours probably are too. Billy
'98 Serengeti
Central Texas From: Safarifriends@yahoogroups.com [mailto:Safarifriends@yahoogroups.com]
Sent: Tuesday, September 17, 2019 8:15 PM
To: Safarifriends@yahoogroups com
Subject: [Safarifriends] Re: Dash Vent System
Received the new vacuum pump, https://preview.tinyurl.com/yyxq3p4a , don't know how long this will work but for now it is working as I think it should. I have had this MH for two years and have never heard the pump shut off!! The defroster still does not blow air. I will have to investigate that another time. Thanks to all for the suggestions and input.
Joe, 1997 Sahara 3550, 3126/300hp, 6 spd '
'98 Serengeti
Central Texas From: Safarifriends@yahoogroups.com [mailto:Safarifriends@yahoogroups.com]
Sent: Tuesday, September 17, 2019 8:15 PM
To: Safarifriends@yahoogroups com
Subject: [Safarifriends] Re: Dash Vent System
Received the new vacuum pump, https://preview.tinyurl.com/yyxq3p4a , don't know how long this will work but for now it is working as I think it should. I have had this MH for two years and have never heard the pump shut off!! The defroster still does not blow air. I will have to investigate that another time. Thanks to all for the suggestions and input.
Joe, 1997 Sahara 3550, 3126/300hp, 6 spd '
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- Posts: 418
- Joined: Sun Jan 17, 2016 12:59 pm
Re: Dash Vent System
' Vent hoses in mine are like new, both coaches. There was an excess of hose from all points. I removed 20+ feet improving flow considerably.
Sent from Yahoo Mail for iPad
Sent from Yahoo Mail for iPad
'On Tuesday, September 24, 2019, 12:26 PM, 'Billy Massey' bdub@... [Safarifriends] wrote:
I just replaced my defroster duct hoses. Originals were rotted to pieces. Yours probably are too. Billy
'98 Serengeti
Central Texas From: Safarifriends@yahoogroups.com [mailto:Safarifriends@yahoogroups.com]
Sent: Tuesday, September 17, 2019 8:15 PM
To: Safarifriends@yahoogroups com
Subject: [Safarifriends] Re: Dash Vent System
Received the new vacuum pump, https://preview.tinyurl.com/yyxq3p4a , don't know how long this will work but for now it is working as I think it should. I have had this MH for two years and have never heard the pump shut off!! The defroster still does not blow air. I will have to investigate that another time. Thanks to all for the suggestions and input.
Joe, 1997 Sahara 3550, 3126/300hp, 6 spd