Dunno, but as I said the diaphragm is the weak spot in those pumps. I believe that the later type is more durable.
Greg -----Original Message----- From: mercedes-boun...@okiebenz.com [mailto:mercedes-boun...@okiebenz.com] On Behalf Of John Reames Sent: Saturday, May 29, 2010 7:10 PM To: Mercedes Discussion List Subject: Re: [MBZ] 83 240D Manual shifting problems almost leaves me stranded Did the 85 model 617.95x's use diaphragms? I thought they were pistons... -- John W Reames jwrea...@comcast.net Home: +14106646986 Mobile: +14437915905 On May 29, 2010, at 14:26, "Greg Fiorentino" <gf...@dslnorthwest.net> wrote: > Rebuilding these older W123 vacuum pumps is a walk in the park. > I've done > this job twice, once on a '79 300TD, once on an '80 240D. BTW, > there is no > piston, it is a diaphragm style pump. The usual failure is a torn > diaphragm. The parts are dirt cheap. The only tricky part is > keeping the > return spring compressed during assembly. If you want to see my > setup for > doing that without building a jig, email me for a pic. > > Greg > > -----Original Message----- > From: mercedes-boun...@okiebenz.com [mailto:mercedes- > boun...@okiebenz.com] > On Behalf Of John Reames > Sent: Friday, May 28, 2010 6:02 PM > To: Mercedes Discussion List > Subject: Re: [MBZ] 83 240D Manual shifting problems almost leaves me > stranded > > > > I had one do that to me; until the brakes totally failed, I had no > idea what was going on. The master cylinder did not lose fluid that I > could tell, and the mechanic that did the safety inspection did not > catch it. > > When I pulled off the master cylinder, brake fluid ran out of the > booster. it must have had fluid up to the middle of it's mounting > hole... > > About 10k miles later the vacuum pump failed (the PO indicated that it > was the second pump that he put on it). When I put a new pump on it, > many vacuum issues sorted themselves out; the old pump bad been weak > for some time. > > Speaking of which, I have the old pump still, I would expect that with > new valves (including the one in the fitting) and maybe resealing the > piston, that it would be servicable. I'll check it out, and if the > arm and bearing look ok then I might rebuild it... > > Pull the master cylinder. Look in the brake booster. It can and will > fill with brake fluid which can be sucked through the vacuum pump, > where it has a jolly good time softening the seals and check valves > during its brief stop on the way to mingle with your engine oil... > > -- > John W Reames > jwrea...@comcast.net > Home: +14106646986 > Mobile: +14437915905 > > On May 28, 2010, at 12:44, Zoltan Finks <mmmmmsuchpo...@gmail.com> > wrote: > >> Okay, I must admit I have been humbled on both the mechanical and >> driving >> fronts. (though I never claimed to know much about fixing cars) >> >> I should have thought to play around with rpms and speed as I was >> fighting >> to shift the thing. Especially since I when I used to have my >> motorcycle, >> every once in a while I would have an effortless, silent shift. Back >> then, I >> surmised that I must be going just the right speed when I shifted, >> and had >> the right engine speed, and probably was on just the right amount of >> incline >> or decline or flat. I will now not consider myself a good manual >> shifter >> until I master this clutchless shifting you all speak of. Actually, >> I never >> did ever hit one of those awesome "speed shifts" that my brother >> used to >> pull off in his 340 Duster, so I pretty much knew I was not a stud. >> My hot >> rod had an auto. All us auto guys always had stick envy. >> >> As for the undriveable 240: To date I had had no problems with >> shifting >> system, so I found myself yesterday searching under the hood for a >> clutch >> cylinder. The owner's manual didn't provide much help. >> >> So there is a cylinder above the clutch pedal, and one at the >> transmission? >> Ok. I'll check for leaks. >> >> I do know that there has always been seeping below the brake master >> cylinder, but the fluid level does not go down noticeably. >> >> I can also say that the hose leading from the brake master cylinder >> and into >> the firewall is braided (not steel braided) and has a hose clamp. I >> wondered >> if the hose clamp setup was not stock. >> >> These are just observations from yesterday on the fly. >> >> Brian >> >> On Thu, May 27, 2010 at 6:53 PM, OK Don <okd...@gmail.com> wrote: >> >>> You can shift it when the clutch is acting up - just pretend that >>> you don't >>> have a clutch at all. You need to rev the engine to match the speed >>> it >>> needs >>> for the gear you're down shifting into. Or rev it too much while in >>> neutral, >>> then the gear will slip in when the speeds match with a little >>> pressure on >>> the shifter. >>> I think all manual tranny drivers shoulod learn how to drive >>> without a >>> clutch -- as I did the first time the clutch cable broke in my VW! >>> >>> On Thu, May 27, 2010 at 8:26 PM, David Bruckmann < >>> bruckma...@transcontinental.ca> wrote: >>> >>>> Probably leaking clutch master or (more likely) slave cylinder. >>>> >>>> The clutch is fed from the rear half of the brake fluid reservoir. >>>> It is >>>> filled, however, by overflowing from the front half. The clever >>>> designers >>>> also put the take-off point for the clutch master cyl halfway up >>>> the >>>> reservoir (in case all you automatic-types were wondering what that >>> dead-end >>>> take-off is halfway up your brake res) so that it is less likely >>>> to cause >>>> lack of fluid at the rear brakes. >>>> >>>> If topping up solves it, you have a leak. >>>> >>>> Fortunately it's not a very difficult job, or at least it wasn't >>>> on my >>>> W115, which has the same transmission IIRC. >>>> >>>> D. >>>> >>>> >>>> At 1:05 AM +0000 5/28/10, mercedes-requ...@okiebenz.com wrote: >>>>> Message: 15 >>>>> Date: Thu, 27 May 2010 18:05:00 -0700 >>>>> From: Zoltan Finks <mmmmmsuchpo...@gmail.com> >>>>> To: Mercedes Discussion List <mercedes@okiebenz.com> >>>>> Subject: [MBZ] 83 240D Manual shifting problems almost leaves me >>>>> stranded >>>>> Message-ID: >>>>> <aanlktinf0v1d8crnkl-hzri69aope7x5rdijvwbte...@mail.gmail.com> >>>>> Content-Type: text/plain; charset=ISO-8859-1 >>>>> >>>>> Hello old list friends, >>>>> >>>>> A problem to ask about today: >>>>> >>>>> 83 240D manual shift. Started having problems downshifting. >>>>> Didn't want >>> to >>>>> go into 2nd after being in 3rd. Didn't want to go into 1st after >>>>> being >>> in >>>>> 2nd. >>>>> >>>>> Basically began to feel like I was trying to shift without the >>>>> clutch. >>> As >>>>> much as it pained me to horse on my beloved automobile, I was >>>>> forced to >>>>> either pull over and get a tow or force the thing into the gears. >>>>> >>>>> Dawned on me that the clutch was basically engaging later, or less >>>>> effectively in the pedal stroke, if that makes sense. >>>>> >>>>> I added some brake fluid to the reservoir and it temporarily >>>>> solved the >>>>> problem. It was not that low at all, but the added fluid made >>>>> problem go >>>>> away. >>>>> >>>>> But later, problem reappeared, even though the fluid is still >>>>> topped >>> off. >>>>> >>>>> My guess is that the tranny is this sensitive to being slightly >>>>> low on >>>>> clutch fluid because the clutch disk needs replacing? >>>>> >>>>> Thoughts? >>>>> >>>>> Thanks, >>>>> Brian >>>> >>> >>> -- >>> OK Don >>> Panic! (the national past time). >>> _______________________________________ >>> http://www.okiebenz.com >>> For new and used parts go to www.okiebenz.com >>> To search list archives http://www.okiebenz.com/archive/ >>> >>> To Unsubscribe or change delivery options go to: >>> http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >> _______________________________________ >> http://www.okiebenz.com >> For new and used parts go to www.okiebenz.com >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > _______________________________________ > http://www.okiebenz.com > For new and used parts go to www.okiebenz.com > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > _______________________________________ > http://www.okiebenz.com > For new and used parts go to www.okiebenz.com > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
