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#1
10-27-2005, 03:36 PM
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Need Booster/vac help...asap leaving on a trip
Thanks for looking.. need some fast help .. I am trying to get out of town with a buddy to Yellostone
 I posted earlier about my buddies car not shutting off... 80 240d 240D wont shut off.. easy diagnosis perhaps? It is not the vac pump.. I hooked up the IP shutoff device direct to the vac pump and it shuts off pronto. where we went wrong is when I repacked the front wheel bearing.. prior to that everything was AOK. The pads needed to be spread apart abit to get past the ridge on the disc.No problem there until I completed the bearing pack and put everthing back on ... thats when I had no IP shutoff. I know is sounds unrelated but by spreading the caliper apart we must have affected something. Now I have brakes but the booster seems affected. When I press the pedal down it stops but gets real firm. Did a search and replies say bad booster. Again I have good/great vac coming from the vac pump. I can't figure it out. I don't buy the coincendce theory. So now that car won't shut off or at best takes 10-15 seconds and the brakes feel real hard as I press mid point. what do y0ou guys think?... I'm trying to leave town to take in one last trip through yellowstone park. Not sure why we are taking the benz since gas is $2.50 a gallon now  anyway all help appreciated...bennett 
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#2
10-27-2005, 03:40 PM
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Quote:
__________________
Proud owner of .... 1971 280SE W108 1979 300SD W116 1983 300D W123 1975 Ironhead Sportster chopper 1987 GMC 3/4 ton 4X4 Diesel 1989 Honda Civic (Heavily modified) --------------------- Section 609 MVAC Certified --------------------- "He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche
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#3
10-27-2005, 03:57 PM
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Ok guys.. further info...
I jsut pulled 19HG on the booster and it holds fine, I pulled the line off the booster and ran a vac test again and the vac pump and line pulled 19HG again. The yellow/green and cruise vac lines are not hooked up by the PO. I have only the brwon line coming off the ip shutoff into the key and the brwon line out of the key goin to the tee in the main vac line. what other lines could it be?... again all I did was pull off my calipers and this cause all the mess. I really didnt touch any vac lines during the bearing pack. The booster symptoms are that I have brakesand then they get stiff as you are about to stop and almost have to stand on them. I have good pads, no stuck caliper pistons...did I do something wrong as I spread teh caliper? excuse the spelling.= typing fast I'm stumped
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#4
10-27-2005, 04:04 PM
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Sounds like you only have vacuum for one step on the pedal. Better make it a good one
 Do what BHD said you have a leak somewhere. Danny
__________________
1984 300SD Turbo Diesel 150,000 miles OBK member #23 (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination
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#6
10-27-2005, 08:26 PM
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Does it have two small lines coming off of the main line to the booster? I leaned over my engine and placed my hand there and broke one of them clean off and didn't even realize i'd done it until the next time I tried to shut it off. Once I learned (and was amazed) that this car shut off with a vacuum system I started checking for leaks. Found that and the non-inky part of a pen insert and trusty JB Weld fixed it, after driving with it like that for a week till a buddy told me to try it.
__________________
Seth 1984 300D 225K 1985 300D Donor body 1985 300D Turbo 165K. Totaled. Donor Engine. It runs!!! 1980 300SD 311K My New Baby. 1979 BMW 633csi 62K+++? Dead odo
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#7
10-27-2005, 08:57 PM
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Quote:
Vacuum pump = good. Move on. Booster more than likely good, move on. You need to test every line that comes off the main vacuum line before the booster. they should all hold vacuum. If you find one that doesn't then you need to follow that line and test everything that line controls. It's not that hard just time consuming. Danny
__________________
1984 300SD Turbo Diesel 150,000 miles OBK member #23 (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination
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#8
10-27-2005, 09:00 PM
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yeah
it is a loose or broken connection. just keep following lines til you find it. it could be a cracked rubber connector. turn them over and wiggle them around and you will find it.
you are barking up the wrong tree thinking you did something on the caliper, unless the hose is loose and you are pumping brake fluid out on the ground. tom w
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.  [SIGPIC]..I also have a 427 Cobra replica with an aluminum chassis.
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