Re: [MBZ] vac pump 1980 300D
Did the shop reverse the vaccum lines to the ignition switch? Or is this how this system should operate? Can I reverse the lines under the hood without damaging anything?. Yes, try that. The lines are supposed to leak on one end (the IP) when ON, and not when OFF (they are coupled together then). The vacuum switch itself can fall apart, I've had this happen, on the Albatross (79 240D). I was able to put it back together in that case, it had gotten oily and a good cleaning took care of it. -- Jim
Re: [MBZ] vac pump 1980 300D
sounds like its doing what its supposed to. When you turn the key off it allows vacuum thru the key to the shutoff. When you turn the key on, you want the vacuum to bleed off so it releases the shutoff and you can start the engine. jgiels wrote: I had the shop fix the steering lock form when they installed the new ignition. I have looking into the slow shut off of the engine. I know there is a leak in the green vacuum line so I have disconnected it. I also disconnected the brown one. So with the mighty vac on the back side of the yellow check valve and the yellow and yellow(with stripe) connected I am able to get 15 of vaccuum, door locks work. When I operate the door locks the vacuum goes down a bit as they operate then recover to 15. When I do the same test with the brown vacuum line connected I do not get the vacuum to recover to 15 it just stays where it goes down to. When I pull a vacuum on the brown line to 15 with the ignition in the OFF POSITION it stays strong for an hour. When I turn the key on the vacuum goes to ZERO and am not able to pull a vacuum on the line. Did the shop reverse the vaccum lines to the ignition switch? Or is this how this system should operate? Can I reverse the lines under the hood without damaging anything?. TIA Douglas Sherman 1980 300D ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- Kaleb C. Striplin/Claremore, OK 91 300D 2.5 Turbo, 90 420SEL, 89 560SEL, 87 420SEL, 87 300SDL, 85 380SE, 85 300D, 84 190D 2.2, 83 300TD, 81 300TD, 81 240D, 76 240D, 76 300D, 74 240D, 73 280SEL 4.5, 72 250C, 69 250 http://www.striplin.net
Re: [MBZ] Vac pump 1980 300D test? HELP
I checked the vacuum with a mighty vac, seems that it idles at 14 inches and when I rev the engine it goes to like 5 inches. recovers to maybe 16 at best.. Now this is just sitting still. Is this what is supposed to happen? No. Something is leaking. Besides the obvious sources it could be the brake booster itself, or the check valve(s) inside the vacuum pump. -- Jim
Re: [MBZ] Vac pump 1980 300D
I had a ignition put on my 1980 300D and the steering lock now doesn't work. and there doesn't seem to be any Vacuum, barely shuts the engine off. I got a mighty vac tool and want to know how much vacuum the pump should be putting out. Sounds like they screwed up the install. The steering lock mechanism is what actuates the vacuum shutoff valve, and they're both right next to the ignition switch. -- Jim
Re: [MBZ] Vac pump 1980 300D test? HELP
jgiels wrote: I checked the vacuum with a mighty vac, seems that it idles at 14 inches and when I rev the engine it goes to like 5 inches. recovers to maybe 16 at best.. Now this is just sitting still. Is this what is supposed to happen? I have never checked this b4... Where did you tap in to check the vacuum? The fact that it's going *down* when you rev the engine makes me wonder if you tapped into the line that goes to the transmission, which has vacuum bled off it by a valve on the injector pump.
Re: [MBZ] Vac pump 1980 300D
jgiels wrote: Well I wouldn't say everything was working perfectly though it worked. I have checked the vacuum lines to the ign switch and they are connected. Another question. Is the steering lock a mechanical lock or is it made from the vacuum? And the 14mg that should be present be on the brown line to the ign switch? I am beginning to susspect the vacuum pump is there a way to test the brake vaccum assist? The steering lock is mechanical - completely unrelated to vacuum. http://mb.braingears.com/123_DISK2/program/Chassis/46-640.pdf Marshall -- Marshall Booth (who doesn't respond to unsigned questions) der Dieseling Doktor [EMAIL PROTECTED] '87 300TD 182Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi, '84 190D 2.2 229Kmi (retired)
Re: [MBZ] Vac pump 1980 300D
Was everything working properly before the ign switch was installed? If so, it sounds like the installer failed to install it properly. There are 2 vac lines going to/from the ignition switch which could be damaged or not connected completely. But the brake vacuum assist is a seperate system - the brake vac line runs directly from the vac pump to the brake booster although there's a T fitting that supplies vacuum to the locks and ign switch. I'll have to dig theu my manual for the pressure it runs at - but I seem to recall it being in the 14/mg area. Good luck - but I really think it's a problem for the guy who installed the ign switch - Larry T (67 MGB, 74 911, 78 240D, 91 300D) www.youroil.net for Oil Analysis and Weber Parts Test Results http://members.rennlist.com/oil Weber Carb Info http://members.rennlist.com/webercarbs Porsche Road Test http://members.rennlist.com/roadtest/ . - Original Message - From: jgiels [EMAIL PROTECTED] To: Mercedes mailing list mercedes@okiebenz.com Sent: Tuesday, July 25, 2006 4:59 PM Subject: [MBZ] Vac pump 1980 300D I had a ignition put on my 1980 300D and the steering lock now doesn't work. and there doesn't seem to be any Vacuum, barely shuts the engine off. I got a mighty vac tool and want to know how much vacuum the pump should be putting out. I disconected the green line and the yellow with the blue or black stripe, seems to work better though not real normal. Also the power brakes don't seem to be working real well if they are applied a few times.. Douglas.. 1980 300D TIA ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.394 / Virus Database: 268.10.4/396 - Release Date: 7/24/2006
Re: [MBZ] Vac pump 1980 300D
Well I wouldn't say everything was working perfectly though it worked. I have checked the vacuum lines to the ign switch and they are connected. Another question. Is the steering lock a mechanical lock or is it made from the vacuum? And the 14mg that should be present be on the brown line to the ign switch? I am beginning to susspect the vacuum pump is there a way to test the brake vaccum assist? Douglas 1980 300 D - Original Message - From: LarryT [EMAIL PROTECTED] To: Mercedes Discussion List mercedes@okiebenz.com Sent: Tuesday, July 25, 2006 7:22 PM Subject: Re: [MBZ] Vac pump 1980 300D Was everything working properly before the ign switch was installed? If so, it sounds like the installer failed to install it properly. There are 2 vac lines going to/from the ignition switch which could be damaged or not connected completely. But the brake vacuum assist is a seperate system - the brake vac line runs directly from the vac pump to the brake booster although there's a T fitting that supplies vacuum to the locks and ign switch. I'll have to dig theu my manual for the pressure it runs at - but I seem to recall it being in the 14/mg area. Good luck - but I really think it's a problem for the guy who installed the ign switch - Larry T (67 MGB, 74 911, 78 240D, 91 300D) www.youroil.net for Oil Analysis and Weber Parts Test Results http://members.rennlist.com/oil Weber Carb Info http://members.rennlist.com/webercarbs Porsche Road Test http://members.rennlist.com/roadtest/ . - Original Message - From: jgiels [EMAIL PROTECTED] To: Mercedes mailing list mercedes@okiebenz.com Sent: Tuesday, July 25, 2006 4:59 PM Subject: [MBZ] Vac pump 1980 300D I had a ignition put on my 1980 300D and the steering lock now doesn't work. and there doesn't seem to be any Vacuum, barely shuts the engine off. I got a mighty vac tool and want to know how much vacuum the pump should be putting out. I disconected the green line and the yellow with the blue or black stripe, seems to work better though not real normal. Also the power brakes don't seem to be working real well if they are applied a few times.. Douglas.. 1980 300D TIA ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.394 / Virus Database: 268.10.4/396 - Release Date: 7/24/2006 ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
