Could some elaborate on a 1975 Mercedes 240D injection pump lubrication

It has a filler cap labeled "OEL". A couple inches below the cap on the side of the pump there is a removable plug. Unscrew the plug and add oil (ordinary motor oil) until it runs out the plug hole. It takes only a small amount of oil. It is good to do this occasionally as the oil will get a bit of fuel mixed into it.

Note that this only exists on 115 and earlier cars. It does not exist on 123 or later cars.

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Palangi

1984 300D 123.133 Heavy Iron
1984 240D 123.123 Euro 5 speed, Beirut Taxi
The above vehicles running on WDO (Waste Dinosaur Oil)
2004 C240 Wagon 203.261 Baby Benz
2006 Toyota Prius, Saving the Planet @ 48 mpg
2000 F-150, Destroying the Planet @ 20 mpg


Never underestimate the power of stupid people in large numbers

Thanks Palangi

Years ago, I was told to syphon out the old diesel diluted oil that was in the pump before adding new oil. Seems to make sense that you would not want the diluted oil in there any longer. The new oil would not be able to magically displace the old stuff, especially with the only drain being a hi level overflow.

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1961 190Db retired
1968 220D/8 325,000
1983 300D 164,150

That is probably a good idea, especially on one where you don't know the history.

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Palangi

1984 300D 123.133 Heavy Iron
1984 240D 123.123 Euro 5 speed, Beirut Taxi
The above vehicles running on WDO (Waste Dinosaur Oil)
2004 C240 Wagon 203.261 Baby Benz
2006 Toyota Prius, Saving the Planet @ 48 mpg
2000 F-150, Destroying the Planet @ 20 mpg


Never underestimate the power of stupid people in large numbers

How do the newer pumps get lubricated?

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DJ


84 300D Turbodiesel 190K with 4 speed manual

AFAIK they have been engine oil lubricated since a long time ago.

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01 Ford Excursion Powerstroke
99 E300 Turbodiesel
91 Vette with 383 motor
05 Polaris Sportsman 800 EFI
06 Polaris Sportsman 500 EFI
03 SeaDoo GTX SC Red
03 SeaDoo GTX SC Yellow
04 Tailgator 21 ft Toy Hauler
11 Harley Davidson 883 SuperLow

I've never examined one to see how they were hooked up to the lubrication system. I became curious about it when this thread came up.

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DJ


84 300D Turbodiesel 190K with 4 speed manual

This comes as news to me...I had driven a '74 240D 170,000 miles and never knew to do anything to it other than change the oil in the crankcase. I must admit I never did a valve adjustment and never, ever added or changed any oil in the IP...hmm...I was young and ignorant then though.

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Marty D.

2011 E350 Bluetec Arctic White/Almond MB Tex (22K)
1984 BMW 733i
1991 Porsche C2 Cabriolet
2012 Lincoln MKz

There is a small black tube running to the inner side of the IP. The oil gets pumped into it and runs out through the timing chain hole.

Actual fact is, a lot of owners never knew about it, and I have never heard of a pump failing from lack of oil. It's just one of those old MB anal maintenance things.

__________________
Palangi

1984 300D 123.133 Heavy Iron
1984 240D 123.123 Euro 5 speed, Beirut Taxi
The above vehicles running on WDO (Waste Dinosaur Oil)
2004 C240 Wagon 203.261 Baby Benz
2006 Toyota Prius, Saving the Planet @ 48 mpg
2000 F-150, Destroying the Planet @ 20 mpg


Never underestimate the power of stupid people in large numbers