Re: [MBZ] Picked up an 83 300TD needs vacuum pump and other issues
I can't keep track of which models are which year, but here is my writeup of the VP replacement on Brunnhilde, 79 TD (123): http://www.constructivity.net/rebuilding_the_vacuum_pump.htm Everything you need to know! Note that I did this once, about a year later the rubber diaphragm failed again. Not sure why, but the 2nd fix has held up so far. 2 things make this easier -- clean the engine well, esp the area around the VP, and remove the power steering pump (which only takes a few minutes). Then you have clean access to the whole deal, clean being really important as the engine is open to the oil reservoir so you don't want trash falling in there. There are allen head bolts that hold it on, gettting to them by contorting around the PSP is not fun. Also, make the little jig as shown from some scrap wood or something as it really helps in reassembly. The second time it was maybe a 2 hour job, the fan and its little bolts with minimal access being the most time consuming and finger scraping aspect. Also keep track of which way everything comes apart and goes together so you get it right. I don't know if the VPs are the same on the SD and TD, but if you are doing this job, taking the time, it makes sense to just get the parts to make it new (like $40) and be done with it (one hopes). --R Mike Canfield wrote: I just picked up an 83 300TD with 298K miles on it. Among some other issues, it needs a vacuum pump. Was working fine and just quit. No vacuum to anything. How hard is it to change the pump? What drives it? I have an 83 300SD I can rob parts fromWill the vacuum pump fit my TD?
Re: [MBZ] Picked up an 83 300TD needs vacuum pump and other issues
Thanks Rich! My 83 is also a W123. That writeup is very helpful. I am going to look at the 300SD to see how hard it is to take the stuff apart..Looks pretty simple to me. Here's a thought..Has anyone tried to replace the diaphragm by just removing the front of the pump while it is still on the car? Looks almost possible from the pics.I will find out when I pull apart the SD. I'd like to buy the new parts but cannot afford the extra right now and I have the parts car, and time. Mike - Original Message - From: Rich Thomas [EMAIL PROTECTED] To: Mercedes Discussion List mercedes@okiebenz.com Sent: Sunday, May 06, 2007 8:49 AM Subject: Re: [MBZ] Picked up an 83 300TD needs vacuum pump and other issues I can't keep track of which models are which year, but here is my writeup of the VP replacement on Brunnhilde, 79 TD (123): http://www.constructivity.net/rebuilding_the_vacuum_pump.htm Everything you need to know! Note that I did this once, about a year later the rubber diaphragm failed again. Not sure why, but the 2nd fix has held up so far. 2 things make this easier -- clean the engine well, esp the area around the VP, and remove the power steering pump (which only takes a few minutes). Then you have clean access to the whole deal, clean being really important as the engine is open to the oil reservoir so you don't want trash falling in there. There are allen head bolts that hold it on, gettting to them by contorting around the PSP is not fun. Also, make the little jig as shown from some scrap wood or something as it really helps in reassembly. The second time it was maybe a 2 hour job, the fan and its little bolts with minimal access being the most time consuming and finger scraping aspect. Also keep track of which way everything comes apart and goes together so you get it right. I don't know if the VPs are the same on the SD and TD, but if you are doing this job, taking the time, it makes sense to just get the parts to make it new (like $40) and be done with it (one hopes). --R Mike Canfield wrote: I just picked up an 83 300TD with 298K miles on it. Among some other issues, it needs a vacuum pump. Was working fine and just quit. No vacuum to anything. How hard is it to change the pump? What drives it? I have an 83 300SD I can rob parts fromWill the vacuum pump fit my TD? ___ 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
Re: [MBZ] Picked up an 83 300TD needs vacuum pump and other issues
I re-read my web page, and Hans sent along the info on his SD which appears to have a different VP but maybe his is a different model or something. You might be able to do the change with the pump on the car (I did not think of that), but once you are at the stage to do that, taking it off, cleaning it all up, and putting it back will take only a little time longer, plus you can do it on the bench. Re the parts, the diaphragm is just a sheet of rubber with the proper holes cut, some guy told me once he has fixed them with just rubber sheet like for gaskets. I have some EPDM rubber roofing material scraps (tough stuff) that looks an awful lot like what the stuff is on the diaphragm. I did consider that... --R Mike Canfield wrote: Thanks Rich! My 83 is also a W123. That writeup is very helpful. I am going to look at the 300SD to see how hard it is to take the stuff apart..Looks pretty simple to me. Here's a thought..Has anyone tried to replace the diaphragm by just removing the front of the pump while it is still on the car? Looks almost possible from the pics.I will find out when I pull apart the SD. I'd like to buy the new parts but cannot afford the extra right now and I have the parts car, and time. Mike - Original Message - From: Rich Thomas [EMAIL PROTECTED] To: Mercedes Discussion List mercedes@okiebenz.com Sent: Sunday, May 06, 2007 8:49 AM Subject: Re: [MBZ] Picked up an 83 300TD needs vacuum pump and other issues I can't keep track of which models are which year, but here is my writeup of the VP replacement on Brunnhilde, 79 TD (123): http://www.constructivity.net/rebuilding_the_vacuum_pump.htm Everything you need to know! Note that I did this once, about a year later the rubber diaphragm failed again. Not sure why, but the 2nd fix has held up so far. 2 things make this easier -- clean the engine well, esp the area around the VP, and remove the power steering pump (which only takes a few minutes). Then you have clean access to the whole deal, clean being really important as the engine is open to the oil reservoir so you don't want trash falling in there. There are allen head bolts that hold it on, gettting to them by contorting around the PSP is not fun. Also, make the little jig as shown from some scrap wood or something as it really helps in reassembly. The second time it was maybe a 2 hour job, the fan and its little bolts with minimal access being the most time consuming and finger scraping aspect. Also keep track of which way everything comes apart and goes together so you get it right. I don't know if the VPs are the same on the SD and TD, but if you are doing this job, taking the time, it makes sense to just get the parts to make it new (like $40) and be done with it (one hopes). --R Mike Canfield wrote: I just picked up an 83 300TD with 298K miles on it. Among some other issues, it needs a vacuum pump. Was working fine and just quit. No vacuum to anything. How hard is it to change the pump? What drives it? I have an 83 300SD I can rob parts fromWill the vacuum pump fit my TD? ___ 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 ___ 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
Re: [MBZ] Picked up an 83 300TD needs vacuum pump and other issues
Peter, You are right on the money. I got looking further and found a jerry-rigged vacuum fitting(the one with the check valve in it). It is repairable with some seal all. Thanks all, Mike - Original Message - From: Peter Frederick [EMAIL PROTECTED] To: Mercedes Discussion List mercedes@okiebenz.com Sent: Sunday, May 06, 2007 11:41 AM Subject: Re: [MBZ] Picked up an 83 300TD needs vacuum pump and other issues An 83 will have a piston type pump, not a diaphram (those were pre-76, I think). A sudden failure is more likely a broken vacuum line than a bad pump, although a broken spring on a check valve will cause sudden failure. I'd check for a big crack in the plastic section of the vacuum line and for a bad brake booster before changing the pump. Peter ___ 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
Re: [MBZ] Picked up an 83 300TD needs vacuum pump and other issues
Thats how I always do it. Mike Canfield wrote: Thanks Rich! My 83 is also a W123. That writeup is very helpful. I am going to look at the 300SD to see how hard it is to take the stuff apart..Looks pretty simple to me. Here's a thought..Has anyone tried to replace the diaphragm by just removing the front of the pump while it is still on the car? Looks almost possible from the pics.I will find out when I pull apart the SD. I'd like to buy the new parts but cannot afford the extra right now and I have the parts car, and time. Mike -- Kaleb C. Striplin/Claremore, OK 92 250D Turbo, 92 300E 4Matic, (2x) 91 300D 2.5 Turbo, 90 420SEL, 89 560SEL, 89 260E, 87 300SDL, 85 380SE 5.0 Euro, 84 190D 2.2, 81 240D, 81 380SLC, 80 240D, 76 240D, 76 300D, 72 250C, 69 250 http://www.okiebenz.com
