santalars Posted May 28, 2009 Share Posted May 28, 2009 I have the usual problem that there are tiny amounts of metal powder building up on cut off solenoid. So far I was sure that that means that there is something wrong in the injection pump and it will need replacement at some stage. Now I had a second look and I'm not so sure anymore. Here is the question: Does the fuel pass through the pump before getting to the cut off solenoid or does the fuel first have to pass the solenoid before getting into the pump? If the second is the case, the metal cannot possibly come from the pump. (or what??) Quote Link to comment Share on other sites More sharing options...
western Posted May 28, 2009 Share Posted May 28, 2009 is the metal powder on the external surface of the shut off soleniod or on the internal part that lives inside the injection pump, if one the inside, then it's probably from the pumps cam/roller parts. Quote Link to comment Share on other sites More sharing options...
santalars Posted May 28, 2009 Author Share Posted May 28, 2009 Well, it's on the inside. How else should it be in contact with the diesel? As usual it's building up at the coil (magnetic) and blocking the plunger from moving and hence shutting off the engine. I just wondered if the diesel first have to pass through the entire injection pump gears before passing the solenoid or if its fresh from the tank when it's passing the solenoid. Quote Link to comment Share on other sites More sharing options...
western Posted May 28, 2009 Share Posted May 28, 2009 fuel passes through the filter to injection pump then throough the pump to injectors. the swarf comes from the roller/cam plate that pressurises the fuel before distribution to the injectors. Quote Link to comment Share on other sites More sharing options...
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