Reply
 
Thread Tools Search this Thread Display Modes
 
Old 11-15-2007, 11:14 AM   #1
Winnebago Owner
 
rvarner's Avatar
 
Join Date: Jan 2007
Location: Pahrump, NV
Posts: 125
I have the vacuum pump running all the time as described in the related post "Pump noise under the hood". My pump will never shut off no matter what position the the switch is in. I have looked everywhere short of tearing apart the dash. I know the pump works cause the coolant mixer (green line) will work. I have pinched off the small black line running into the ball and have pinched off the large black line running to the pump. It never shuts off even with the lines pinched. Is there a way to isolate the pump (shut it off-short of pulling the wires) for test purposes?? Thanks
Richard
__________________
2004 Horizon 40AD/ISC 350/2012 SILVERADO or 2008 Chevy HHR/Demco/Vmspc/FMCA-F394912/SKP-115085/2004 Can-Am Outlander/2013 Polaris RZR
rvarner is offline   Reply With Quote
Old 11-15-2007, 11:14 AM   #2
Winnebago Owner
 
rvarner's Avatar
 
Join Date: Jan 2007
Location: Pahrump, NV
Posts: 125
I have the vacuum pump running all the time as described in the related post "Pump noise under the hood". My pump will never shut off no matter what position the the switch is in. I have looked everywhere short of tearing apart the dash. I know the pump works cause the coolant mixer (green line) will work. I have pinched off the small black line running into the ball and have pinched off the large black line running to the pump. It never shuts off even with the lines pinched. Is there a way to isolate the pump (shut it off-short of pulling the wires) for test purposes?? Thanks
Richard
__________________
2004 Horizon 40AD/ISC 350/2012 SILVERADO or 2008 Chevy HHR/Demco/Vmspc/FMCA-F394912/SKP-115085/2004 Can-Am Outlander/2013 Polaris RZR
rvarner is offline   Reply With Quote
Old 11-15-2007, 01:39 PM   #3
Winnie-Wise
 
Join Date: Aug 2004
Posts: 354
Richard:

I just replaced the vacuum pump assembly. If you follow the vacuum tube from the "Black Ball" you will find the vacuum assembly. My vacuum assembly is a FORD heavy duty truck part #FOE3HZ-2A451-A / PUMP ASY-VAC. Cost was $208.

The only way to shut it off is to pull a wire. If you have room to get under the coach use a screwdriver and remove the 3 sheet metal screws. I was told this is an important part that creates vacuum for more than the AC controls, it might also create vacuum for engine and air-assist brakes. That's why I drive 300 miles round-trip in my toad from a Flagstaff AZ Ford dealer to another Ford dealer.

Anyone taking a long trip; I would add this vacuum assembly to my tool box because not every Ford dealer carries this part. It is very easy to remove and replace, takes about 15 minutes if you have a part in-hand. If not you might find yourself driving for 5 hours...If I had only known!
Gary CA is offline   Reply With Quote
Old 11-15-2007, 02:53 PM   #4
Winnebago Owner
 
rvarner's Avatar
 
Join Date: Jan 2007
Location: Pahrump, NV
Posts: 125
Thanks Gary. Sounds like that part is pretty expensive. How did you test it to see if it really was the pump? I sure don't want to order one unless I'm positive it's bad. Mine is still creating a vacuum and I would think there would be a simple test to check it.
Richard
__________________
2004 Horizon 40AD/ISC 350/2012 SILVERADO or 2008 Chevy HHR/Demco/Vmspc/FMCA-F394912/SKP-115085/2004 Can-Am Outlander/2013 Polaris RZR
rvarner is offline   Reply With Quote
Old 11-15-2007, 04:55 PM   #5
Winnebago Master
 
SCVJeff's Avatar
 
Join Date: Dec 2006
Location: Santa Clarita, CA.
Posts: 1,217
I started out with the ol' finger blocking test. You should be able to block the output of the ball, or pump and the motor will shut off. I just happen to have a vacuum pump/ gauge checker from a previous MH issue I was chasing, so it was handy to have. But this pump (as far as I know) only supplies vacuum to the dash HVAC solenoids. Unless it's open between the ball and dash control (or the control itself is in trouble) you should be able to get the pump to shut off in some position: Def, Mix, Vent, etc.

As flakey as those little tubes have been, look very closely at all of them because this seems like the norm rather than the exception.
__________________
_______________________________

Jeff - WA6EQU
'06 Itasca Meridian 34H, CAT C7/350
SCVJeff is offline   Reply With Quote
Old 11-16-2007, 01:37 PM   #6
Winnebago Owner
 
rvarner's Avatar
 
Join Date: Jan 2007
Location: Pahrump, NV
Posts: 125
Thanks SCV Jeff. I have blocked vacuum output with the hose off. I can feel vacuum but the pump will not shut off. I am beginning to believe Gary CA is right and the interior workings of the pump are defective. Will order a new pump, it's only money.

Gary CA. Did you call around for the pump or did you try locating one on the internet? How did you find that number? I wonder if the 04 and 02 use the same pump but probably wouldn't matter anyway. Was Winnebago any help?
Thanks
Richard
__________________
2004 Horizon 40AD/ISC 350/2012 SILVERADO or 2008 Chevy HHR/Demco/Vmspc/FMCA-F394912/SKP-115085/2004 Can-Am Outlander/2013 Polaris RZR
rvarner is offline   Reply With Quote
Old 11-17-2007, 05:02 AM   #7
KIX
Winnebago Master
 
KIX's Avatar
 
Join Date: Dec 2006
Location: St. Augustine, FL
Posts: 587
Richard,
I've also had the same pump problems and bought the replacement from Ford. Mine had the Ford logo on it and a part #. Ford knew what part by the number I gave them. I paid $203 about 2 years ago in Austin, TX
__________________
KIX
'02 Ultimate Advantage 40J Spartan MM - Cummins ISC
KIX is offline   Reply With Quote
Old 11-17-2007, 08:43 PM   #8
Winnie-Wise
 
Join Date: Aug 2004
Posts: 354
Richard: I just made the drive to pick-up the available pump, I needed to get it fixed and back on the road. Long drive, quick repair.

I did remove the hose from the old unit but did not get vacuum.
Gary CA is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Vacuum pump on diesel--is it failing? rv rick Winnebago General Discussions 12 09-09-2009 06:26 PM
Vacuum Pump Failure traveler of california General Maintenance and Repair 13 03-14-2009 11:26 AM
Dash air/heat vacuum pump ??? Dick Morse General Maintenance and Repair 9 10-16-2008 04:17 PM

» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Winnebago Industries or any of its affiliates. This is an independent, unofficial site.


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 05:21 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×