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Old Jan 21, 2008 | 10:25 AM
  #1  
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syjl
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Cool Found on Road Dead

I was headed out to ride my dirt bike yesterday and got just north of vegas when the battery (no charge) light came on. I pulled over and the serpentine belt was laying there because the vacuum pump had cracked in half and the pulley was hanging loose. The wife brings out the pump ($110) but I can't get the pressed on pulley off. Back to Autozone in town to swap the pulley but when I get back to the truck where I left the bolts, the bolts won't go in because the pulley is already on. *!@#$!* Back to town, pull the pulley, put the bolts in the holes, put the pulley on, back to the truck, install the pump, put the belt on, and 8 hours later, I get back home.

1) Is this a common failure?
2) There was no bolt holding the pulley on even though it looks like there should be. Do you guys have a bolt on your vacuum pump pulley?

Thanks for the help.
 
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Old Jan 21, 2008 | 10:35 AM
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1) Is this a common failure? Yea it's rather common. The Vac pumps don't seem to have a long life.

2) There was no bolt holding the pulley on even though it looks like there should be. Do you guys have a bolt on your vacuum pump pulley? The threaded hole in the pump shaft is for the pulley tool to thread into. That's what you use to get the pulleys off and on as you found out.
Alot of people ditch the vac pump. I coverted to Hydroboost on mine and as soon as I get an electric vacuum setup off a newer truck mine is getting tossed.

The upside to all your trouble is you won't have to worry about it for a long time.
 
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Old Jan 21, 2008 | 11:42 AM
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Common. Yes
It would have been nice to have a hole in the pulley for that one bolt.

Bill
 
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Old Jan 21, 2008 | 12:03 PM
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Brian, if you install an electric pump and toss the belt driven one what do you put in it's place so the belt will fit?

Educate me.

Rog
 
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Old Jan 21, 2008 | 01:08 PM
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as said yes that all sounds about right! It would be pretty easy to build an idler pulley to take the place of the vacuum pump. That will be my plan if I ever get to go hydroboost and electric vacuum pump.
 
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Old Jan 21, 2008 | 01:53 PM
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Something i heard but never had the time to see if it works.
1st thing driving without vac its near impossible to stop one of these trucks.
Dont ask how i know.

In the event of a vac pump failure you can reroute the belt.
By pass the vac pump with the belt. Now when reinstalling the belt, install it on the upper pulley then the lower pully of the tensioner from the crank.

Anyone game to see if true?
To cold and mines a van. PITA

TJ
It might be just what you are looking for if you go electric.

Bill
 

Last edited by MADVAN; Jan 21, 2008 at 01:57 PM.
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Old Jan 21, 2008 | 01:54 PM
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ok i have to ask a dumb question... but its for a friend... honestly.. lol.. what does the vacuum pump do ? ill just figure it makes vacuum, but for what?
 
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Old Jan 21, 2008 | 01:58 PM
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Originally Posted by gt8684
ok i have to ask a dumb question... but its for a friend... honestly.. lol.. what does the vacuum pump do ? ill just figure it makes vacuum, but for what?
Power assist for the brakes & the heater ,air conditioner controls ,,,
 
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Old Jan 21, 2008 | 01:58 PM
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ohh ok great, thanks, i shall let my friend know about that
 
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Old Jan 21, 2008 | 02:10 PM
  #10  
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Originally Posted by gt8684
ok i have to ask a dumb question... but its for a friend... honestly.. lol.. what does the vacuum pump do ? ill just figure it makes vacuum, but for what?
For cleaning the carpet and seats!

Bill
 
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Old Jan 21, 2008 | 02:18 PM
  #11  
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gt8684
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From: Folsom, Louisiana
hey that would make perfect sence... having a shop vac built into your truck... for those dirty situations
 
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Old Jan 21, 2008 | 05:50 PM
  #12  
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kawa ..... I would take the pump off and leave it off ... I would have to get a shorter belt. I believe someone on here has already done it that's where I got the idea. Can't remember who though.

MADVAN .... I can second that driving these with a vacuum pump failure isn't fun at all, been there done that.
 
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Old Jan 21, 2008 | 07:25 PM
  #13  
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Wow! Similar circumstance happened to me. I was visiting my parents 250+ miles from home, and the vac pump went the day I had to leave. So I ended up borrowing their extra car, and having it fixed by a mechanic because I didn't have the time to work on it for the next couple of weeks, but we needed the truck. So $300.00, week, and an unplanned day trip to the rents later I have a new vac pump...

apparently they should be changed out every 100,000 miles.

-Iasrap
 
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Old Jan 21, 2008 | 07:41 PM
  #14  
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I did drive the truck about five miles until it got hot and I stopped. Waited for it to cool some and drove another three miles to an exit so I could work on the truck safely. Too many people been killed on that section of highway by wayward vehicles. Yes, it was a bitch to turn, stop, and no heat for the driver. After all , it was all the way down to 40 degrees. The bitter cold of a Vegas winter.
 
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