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Old 06-19-2020, 12:54 AM   #1
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Ford Lehman 120 injector pump oil change

Hi All have a Lehman 120 and for the life of me cant find the drain plug to change oil in the injector pump, and it seems like such a critical service item relative to longevity of pump, by other photos provided by owners of lehman 120 my injector pump looks different mine has a hose going from the top of the oil filter to the injector pump which i suppose puts engine oil into the injector pump and making the need for oil changes redundant and unnecessary
Thanks in advance for any advice
Michael
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Old 06-19-2020, 06:51 AM   #2
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are you sure thats a lehman 120? looks like a 135 what is the ford number on the valve cover? i have a american diesel it looks like yours.
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Old 06-19-2020, 06:54 AM   #3
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if its a 135 you don't have to change the oil .see the line goes from the oil filter housing to the pump .
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Old 06-19-2020, 07:28 AM   #4
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I agree with the injector pump thinking it's a 135...but the chromed valve cover could be easily switched like mine...a 130 with shiny valve cover.

Best to get the block serial (at least according to American Diesel).
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Old 06-19-2020, 07:44 AM   #5
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mine is an american diesel 136 not a Lehman and doesn't have a chrome valve cover. it also has 120 type manifolds . if it's a american diesel it will have the oil cooler in the fresh water loop .
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