Need an electric Vacuum Pump....

[CumminsPuller]

I need an electric Vaccum pump that pulls atleast 20 in. Hg. to run my vac. over hydraulic brakes... ... ... . Anyone know anything about these. Good reliable brand name?



Jason

 

[PJereb]

See if you can purchase the pump from a Jake brand exhaust brake. That may be a good choice instead of an electric pump

 

[CumminsPuller]

How are they driven? Belt?



Jason

 

[PJereb]

Yes, the Jacobs pumps are belt drive, you use a longer drive belt to drive everything.



If you are familiar with the mid 90's Power stroke Ford's, they used a belt drive vacuum pump for their brake booster, they look very similar to the Jacobs unit.



I have no idea what they cost, but it would be a good "excuse" to also get an exhaust brake!



Peter

 

[Deezul1]

I have heard that Ford Diesels use a electric vacum pump and it works well for other uses

 

[HoleshotHolset]

The 7. 3L IDI's and Power Strokes that I used to work on all the time had belt driven vacuum pumps... they seemed pretty reliable - I probably only swapped out 2 or 3 of them over a period of 5 years on 12 different trucks putting on 4-5k a month...



On edit: Sounds like you're getting serious about the 8. 3L C-Series swap, eh?



Matt

 

[CumminsPuller]

Matt... ..... Actually I am looking at an FL-50 with the 8. 3C Cummins. Just trying to figure out what I would have to do to pull my trailer with vac over hydraulic. Take a look at this thread I strated: FL-50



Tell me what you think,



Jason

 

[CChase]

Go search on The Diesel Stop in the 6. 9 and 7. 3 IDI forums. There have been a lot of guys that have pondered using electric vacuum in lieu of mechanical pump. One guy over there (can't remember his name) has a list compiled of cars that used electric vacuum pumps that can be then located in salvage yards.



Deezul1 - Fords used a mechanical (belt driven) vacuum pump from the '83 6. 9 through 94 at least that I know of. Not 100% sure on the PSDs.

 

[HoleshotHolset]

PSD's stuffed into Econoline van chassis still run the belt-driven vacuum pumps to this day.



The Econoline van chassis uses vacuum assisted brakes...



My experience is with '89-'99 (or so) E-350's with the 138" wheelbase - both single and dual rear wheel models (up to 10,500 GVW). They all ran pretty much the same pump... the pulley and mounting brackets were the only thing to change over the years...



Matt

 

[CumminsPuller]

Well after looking at the truck... ... . I don't see how I am going to be able to stuff a belt driven vacuum pump in there so it will be lined up with the current belts. Just seems to be no room. I do not want to go spend $550+ dollars on a Carlisle or Masterbrake unit to convert to Electric over Hydraulic. Just seems I could do it for cheaper. I have found a couple of electric vacuum pumps but not sure how reliable they would be as a stand alone operation. From what I can tell they are meant to assist with current vacuum systems where more vacuum is needed. Anyone with some ideas?



Jason

 

[Dane]

Here ya go...

#ad




http://www.mpbrakes.com/ac2724k.htm

 

[CumminsPuller]

Dane,



What worries me about those kind of pumps is that the description states that it is used to supplement low vacuum the vehicle supplies. But how well will it work as a stand alone? That is what I am worried about.



Jason

 

[Dan_69GTX]

Throwing out ideas here.



Why not hook up a mechanical vacuum pump to run off a PTO?

That would get it out of the engine compartment all together.





Another idea - why not use the electric to supplement another vacuum source - such as modifying the exhaust for a venturi affect to create some vacuum? - obviously at idle there wouldn't be much vacuum.





What about this one - it is designed to be the ONLY vacuum pump - as a replacemnt for the belt driven type:

http://www.masterbrake.com/elec_vp.pdf





Another idea is a Thomas brand vacuum pump

http://www.thomaspumps.com/pdf/standard_catalog.pdf

We had a fire truck with one of their air compressors in it - never had a problem with it - and it ran a LOT!!!



Just some ideas



Dan

 

[Deezul1]

The most innovative solution to belt driven stuff that I have seen was on a street rod. They mounted the alternater off the frame underneath the car and drove it off the drive shaft. With a pivot type mount that was spring loaded and the belt around the shaft close to the trans for minimum movement. They didnt use a pulley on the shaft, just wrapped the belt around it with hefty spring tension on the alternater and they said it worked fine except in heavy stop and go traffic. With a big resevoir it might work ok

 

[HoleshotHolset]

I'd love to see pics of an alternator setup like that... that's freakin' cool!



Of course - it wouldn't last 10 seconds in a road salt environment... but this is on a street rod. Very cool.



Matt