what part of my notice states ALL trucks? I said MANY and I qualified it that MINE is not one of them. I should further qualify it by saying many DIESEL trucks from chevy, have them not the gassers of course...

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

My idea was to fasten a round, 1/4" thick, steel plate to the block with the 6 small allen-bolts. Then attach the vacuum-pump to that with 3 or 4 larger fasteners - as needed.
The vacuum-pump I had in mind is fairly small & light, and shouldn't require that much tension of the belt. I would try to ride one side of the PS belt with just enough pressure to drive the vacuum-pump pulley.
As for rebuild-parts, the replacemnt lever & bearing repair-kit I found was a NEW part, made by Pierburg, manufacturer of the original pump. The $300 replacement pump I wound up installing on my wagon was also NEW Pierburg unit. No need for a core-charge.

Happy Motoring, Mark

__________________
DrDKW

I instinctively prefer the idea of a belt driven vacuum pump rather than an electric replacement - I guess this is partly because you may need to upgrade the alternator if you're continually running a pump - but mainly as the vacuum is used for power brakes it just seems "safer" to use a belt... this is probably an emotional response from a mechanically (rather than electrically) minded person though.

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

I have a friend that volunteered to try and extract the bearing-races from the lever of my failed vacuum-pump. When my pump failed, the lever got a serious groove carved in it as it rode against the edge of the cam for several miles. So I wouldn't attempt to reuse it even with new bearings. However, if correct replacemnt bearings can be found, it might make sense to replace the 25 + year-old ones in an old pumo BEFORE they fail.
Again, I'm very lucky that the lever itself didn't break apart and drop fragments into my timing-chain!

Happy Motoring, Mark

__________________
DrDKW

bump

__________________
DrDKW

Found an Electric Vacuum Pump that I believe has enough volume to do the job. I drove around with it as the sole supplier of vacuum and everything worked normal.
However, my test was not conclusive because I had no vacuum Shutoff Switch, Check Valve or Relay to test it correctly. The Pump got too Hot running all of the time.

The other Electric Vacuum Pump suggested by Compress Ignite in the thread below was made for the job and has all of the electric goodies needed to regulate the Vacuum. However, it is an expensive Vacuum Pump.
The forums that have the most information on 12 Volt Vacuum Pumps are Electrical Vehicle (EV) Forums where people are converting regular Cars to Electric Power.
Here is my thread:


Having an Electric Vacuum Pump may also mean you need to get a higher amperage Alternator.
The question is Pay $350+ for an New Stock Vacuum Pump or pay $350+ for a new Electric Vacuum Pump.

If your AC is not working and you never plan to fixe it the other Alternative is to install a pulley driven Mechanical Vacuum Pump; a bunch on ebay. But, you would have to make the brackets and

__________________
84 300D, 82 Volvo 244Gl Diesel

Great thread . There is an example of someone using the Ford IDI vacuum pump on the benzworld dot org forums - search for "vacuum pump substitution"

http://www.benzworld.org/forums/w124-e-ce-d-td-class/1532745-vacuum-pump-substitution.html

All the old RWD Cadillacs from about 1979 through about 1997 had electric vacuum pumps. A $25.00 scrap yard item.

We rigged one up on a buddy's truck to fill his air bag system and it works great....Robert

__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership

Isn't that a compressor? Or are you suggesting using the input as a vacuum pump?

__________________
1981 Mercedes 300TD, 1994 Honda Civic Del Sol
http://mefi.us/images/fuelly/smallsig-us/67195.pnghttp://mefi.us/images/fuelly/smallsig-us/103885.png

The Vacuum Pump looks slightly Different from the Compressor.

There are some GM Products (Cars in the 80s that had Turbochargers) that did have a Brake Booster Vacuum Pump.
The Electric (EV) Vehicles site have a list of the years and models.

I have looked several times at a Junk Yard and I never found even one of them.
Also it may need a Vacuum Switch and Relay but I am not sure on that?

Attached Thumbnails

     

__________________
84 300D, 82 Volvo 244Gl Diesel

It was plumbed into the power brake circuit on the Cadillac, so to me it was a vacuum pump, but, it has an exhaust port that produces pressure, which is how we plumbed it into his truck....

__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership

http://www.ki7xh.com/dieseliz.htm
There already is a benz block off plate, This unimog site is cool with lots of interesting stuff.-and the first explanation of flywheel match balancing I ever came across--nice detailed pics of the german "strong Steel Ring' and the 617 front engine mount and ----

DO NOT MISS the video clipp of the mogg going 70 mph on the gravel road in N Colorado

almost at the bottom of the page he was using a "air assisted brake compressor" ? or is it actually a vaccum pump?
heres the link that's got the mogg radio truck haulin ass -->thats a 7000 lb 4X4 truck--witha 617a powering it!
http://www.ki7xh.com/rmm2000.htm

The Vacuum Block Off Plate looks a lot like a Pie Plate?

I suppose an old Wheel cover might also work.

Attached Thumbnails

 

__________________
84 300D, 82 Volvo 244Gl Diesel

ford super duty electric pump
Powerstroke Diesel Vacuum Pump F250 F350 F450 F550, Diesel Care and Performance Inc