P-Pump Lubrication - Dodge Cummins Diesel Forum
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post #1 of 5 (permalink) Old 03-21-2012, 08:25 PM Thread Starter
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P-Pump Lubrication

Where does it get it's lubrication from?

Does it use engine oil?

If so, how does it get to the pump and out of the pump?

I have a pretty significant oil leak and it appears to be coming from somewhere around the throttle linkage. What is there that oil can be coming out of?

At first we thought tappet cover gasket, but the oil is coming from the drivers's side of the injector pump.


TIA,
Gary


Last edited by koga07; 03-21-2012 at 08:31 PM. Reason: Clarification
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post #2 of 5 (permalink) Old 03-21-2012, 09:24 PM Thread Starter
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Upon closser examination, the oil appears to be coming out from around where the throttle goes into the pump. Is oil in that part of the pump?
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post #3 of 5 (permalink) Old 03-21-2012, 09:26 PM
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Oil is pumped in thru the flex hose that is on the flat side of the pump that faces the engine. It drains back into the engine thru the front of the pump into the gear case.

Is the oil leaking from the rod that sticks out of the top, just to the rear of the previously mentioned oil line? If that is the seal, the pump has to be removed to replace the seal. More than likely the rod is also worn and needs to be replaced, that was the case with mine anyway. Austin Injection is the place to go in TX.
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post #4 of 5 (permalink) Old 03-21-2012, 09:31 PM
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Quote:
Originally Posted by koga07 View Post
Upon closser examination, the oil appears to be coming out from around where the throttle goes into the pump. Is oil in that part of the pump?
You posted while I was typing. Is it the throttle rod, or the fuel shut off? The top side rod is the fuel shut off rod. I can't help you with any knowledge if it is the throttle. Never had that fail on me.

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post #5 of 5 (permalink) Old 03-21-2012, 10:07 PM Thread Starter
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Well, I think we found it. The AFC has two broken bolts (lower ones, that hold the fuel shutoff solenoid), and two loose bolts.

For now, we're gonna tighten the two loose ones. I will drill out and replace the other two when I have time. If this is where it's coming from, just tightening the two upper ones should help. Gonna keep an eye on it. Thanks to all for your input.


Gary
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