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#1
08-05-2003, 12:01 AM
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Vacuum pump rebuild as normal maintenance
I've got just over 180K on my fine running SD but was wondering about the long term viability of the original vacuum pump. Would a complete rebuild be in order as part of the normal required work?? The manual doesn't mention it. Thanks to all.
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Orland Park, IL 1985 300SD 215,000 miles 
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#2
08-05-2003, 01:52 AM
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The SDL has 265,000mi. on it and I've never touched the vacuum pump. If it ain't broke don't fix it.
However make sure you put the inline filters in the vacuum lines in case the vacuum pump develops a leak. You don't want oil getting into the locking system or the rest of the vacuum system. Dave
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1970 220D, owned 1980-1990 1980 240D, owned 1990-1992 1982 300TD, owned 1992-1993 1986 300SDL, owned 1993-2004 1999 E300, owned 1999-2003 1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD 1988 560SL, 100,000mi, owned since 1995 1965 Mustang Fastback Mileage Unknown(My sons) 1983 240D, 176,000mi (My daughers) owned since 2004 2007 Honda Accord EX-L I4 auto, the new daily driver 1985 300D 264,000mi Son's new daily driver.(sold) 2008 Hyundai Tiberon. Daughters new car
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#3
08-05-2003, 09:40 AM
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I think dmorrisons right, " If it ain't broke don't fix it. "
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 1985 Euro 240D 5 spd 140K 1979 240D 5 spd, 40K on engine rebuild 1994 Dodge/Cummins, 5 spd, 121K 1964 Allice Chalmers D15 tractor 2014 Kubota L3800 tractor 1964 VW bug "Lifes too short to drive a boring car" Last edited by Stevo; 08-05-2003 at 11:16 AM.
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#4
08-05-2003, 11:10 AM
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The original vacuum pump on my 240D topped 500,000 miles before it started making noise. The roller was starting to come loose. If you wish to check something, the roller is a hundred times more important than the diaphragm portion. If the roller breaks off it can go into the engine and wreck it completely.
I would not even remove the pump for this reason because if you are listening to the engine you will hear noise from the pump giving you a warning before it gets so bad that it breaks off and does damage. Good luck,
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#5
08-05-2003, 11:33 AM
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I just hope PEH does not see this question... it might put him ' over the top' .....the 'the big one'.....
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#7
08-05-2003, 09:34 PM
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The little filters are called strainers. They were not originally on 123 diesels but have been adapted from later models to give a visual warning of oil in the vacuum system. The part number should be 000-078-06-56. Somewhere I have a drawing of where they go and which way they point, but I can't lay my hands on it at the moment.
When I do an oil filter change I just stick a pipe cleaner in a vacuum line and see if there's any oil. So far, haven't found any.
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Palangi 2004 C240 Wagon 203.261 Baby Benz 2008 ML320 CDI Highway Cruiser 2006 Toyota Prius, Saving the Planet @ 48 mpg 2000 F-150, Destroying the Planet @ 20 mpg TRUMP .......... WHITEHOUSE HILLARY .........JAILHOUSE BERNIE .......... NUTHOUSE 0BAMA .......... OUTHOUSE
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