Vacuum Pump Story
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Vacuum Pump Story
Driving on the Freeway, sounded like the turbo sped up and whistled a few times. Then smoke comes roaring from under the hood and loud broken metal spinning noises. I get the van to my jobsite and take a look. The shaft for the Vacuum pump busted behind the bearing and created trouble for me. But my Ford Dealership had a new vacuum pump, vacuum pump pulley and serpentine belt. About 45 minutes later it was changed out by me and everything was back to normal. Had to buy a ford powersteering pulley installer but we always love new tools don't we. 
Hotshot
Joined: Jan 2011
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From: Puget Sound
Driving on the Freeway, sounded like the turbo sped up and whistled a few times. Then smoke comes roaring from under the hood and loud broken metal spinning noises. I get the van to my jobsite and take a look. The shaft for the Vacuum pump busted behind the bearing and created trouble for me. But my Ford Dealership had a new vacuum pump, vacuum pump pulley and serpentine belt. About 45 minutes later it was changed out by me and everything was back to normal. Had to buy a ford powersteering pulley installer but we always love new tools don't we.
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Joined: Mar 2012
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From: Jenkintown, PA
My 97 E350 has one, it supplies vacuum to accessories and the power brake booster. Mine went bad as I was backing into a parking space at the local convenience store. All of a sudden, no vacuum, no brake boost, hard pedal. I hit a steel pole at the end of the parking spot before realizing what was happening, and it cost me a vacuum pump and a rear bumper. The pulley is pressed on, as I recall, and I didn't feel like buying the special puller, so the stealership got me on that one.
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Hmm I thought all these diesels had a vacuum pump because they don't make vacuum because they are diesels. Its on the drives side has a black smooth face pulley about 4" in diameter and is held on with 3 - 10mm bolts. The black hose coming out of it goes directly to the brake booster. Take a lookske and see where your black hose from your brake booster goes to, maybe you will be surprised.
Postmaster
Joined: Jul 2006
Posts: 3,754
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From: Indianapolis
You're talking about the power steering pump. It also powers the hydro-boost power braking system. The only vacuum pump I've ever heard of is the one on a gas vehicle to suck fumes from the tank IIRC.
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Lead Driver
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From: Damon (South East Texas)
The E series vans and OBS F series trucks, with diesel engines, are equipped with the belt driven mechanical vacuum pump.
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Senior User
Joined: Mar 2012
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From: Jenkintown, PA
Hmm I thought all these diesels had a vacuum pump because they don't make vacuum because they are diesels. Its on the drives side has a black smooth face pulley about 4" in diameter and is held on with 3 - 10mm bolts. The black hose coming out of it goes directly to the brake booster. Take a lookske and see where your black hose from your brake booster goes to, maybe you will be surprised.
Chris
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Joined: Nov 2007
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From: Payson, AZ
The different firewall configuration in a van most likely doesn't leave room for the hydroboost and they had to use a vacuum boost. JMO
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