Quote:
Originally Posted by psaboic
Guys, a quick question as I am still learning a bit about my 83 300D with the OM 617. I always thought the injection pump was the only fuel pump on the car. Is it? Or am I wrong and their is another fuel pump on the car called the "lift pump"
Am I basically right in assuming the OP had his injection pump go bad and wants to replace it with an electric pump?
If the OM 617 has an additional pump besides the injection pump, please let me know so I can search for info on it. I'm thinking I might want to install an electric pump for peace of mind.
Glenn
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On the Right side sort of in the middle of your Fuel Injection Pump you have a Fuel Supply/Lift Pump Bolted on to it.
On your Year and Model there is also a Hand Primer Pump screwed into the Fuel Supply/Lift Pump.
So there is a Fuel Injection Pump (supplies high pressure Fuel to the Injectors), a Fuel Supply/Lift Pump (supplies the Fuel Injection Pump with a large volume of Fuel at a lower pressure compared to the amount that is Injected into the Injectors. Most of which runs through the Fuel Injection Pump and out the Pressure Relief/Overflow Valve to cool the Fuel Injection Pump)and a Hand Primer Pump (used for priming the Fuel Injection pump and hopefully getting all of the air out of it).
Blue Arrow = Fuel Supply/Lift Pump
Yellow Arrow = an old style Aluminum bodied Hand Primer. The newer style Hand Primers go in the same spot but are covered with Black Rubber and looks Different.
You need to learn how to Bleed the Air out of your Fuel System. It is a common occurance for a new owner to change the Spin-on Secondary Fuel Filter and not be able to start the Engine even after they have used the Hand Primer. I would do some reading of the below links.
DIY Repair Links
http://www.peachparts.com/shopforum/forumdisplay.php?f=82
http://www.peachparts.com/Wikka/DoItYourSelf