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Old 05-18-2011, 04:20 PM   #1
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Any one know what this pump is for....

Find this pump under my dash but i don't know what it is for anyone know on the company site they say for horn or brake assist ????????

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Old 05-18-2011, 04:42 PM   #2
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Since your coach is diesel, I would suspect it's a vacuum pump for your HVAC system vacuum actuators that changes positions of baffles to direct air either to defrost, dash ac/heat vents or floor vents. Just a guess

Jim & SherrySeward

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Old 05-18-2011, 04:46 PM   #3
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The one on my RV has something to do with the HVAC controls. I can make it operate by moving the heater / defrost / AC settings.
Wayne & Roberta and Maggie the Miracle Dog
08 Winnebago Destination 39W Gas UFO Workhorse Chassis
Making the Journey in our Destination

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Old 05-19-2011, 05:53 AM   #4
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It is a vacuum pump (note an "in & out" port for vacuum lines) and it is for the hvac valves......
Hal & Ginny Miller '04 Beaver Santiam PRT40
'04 Saturn Vue - US Gear Brake - Blue Ox tow
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Old 05-19-2011, 03:12 PM   #5
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Thank you very much for the info.

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