Keith Browning Posted April 7, 2008 Share Posted April 7, 2008 Could you fellas click on the file attachment and tell if I am right that this HPOP is bad? I have not seen a bad one on a 2003 engine but I cant think of anything else that would look like this screen shot. Quote Link to comment Share on other sites More sharing options...
Bruce Amacker Posted April 7, 2008 Share Posted April 7, 2008 The pulses look very suspicious, but I'm a diagnostic freak. Before it gets a pump it gets an air check and a known good/new IPR. It could be an o-ring that seals up to 300psi before it burps. I check the low side, too, I just had an '03 no-start in class Friday that would not fill the oil filter. They're checking the pan for chunkies and pulling the LPOP now..... I assume the KOEO ICP was in range? /forums/images/%%GRAEMLIN_URL%%/grin.gif Quote Link to comment Share on other sites More sharing options...
Alex Bruene Posted April 7, 2008 Share Posted April 7, 2008 Could you fellas click on the file attachment and tell if I am right that this HPOP is bad? I have not seen a bad one on a 2003 engine but I cant think of anything else that would look like this screen shot. Really? The majority of ICP issues I find on early build engines turn out to be the pump. Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted April 8, 2008 Author Share Posted April 8, 2008 It got a new ICP and pigtail because it was leaking oil and showing 0.10V. Oil flow is good. He air checked it and the sound definitely changes when closing the valve. What you see on the graph is with the IPR closed manually with a jumper while dead-headed, sorry I didn't add that in the original post. If this was a high pressure leak I would not expect to see the very even pulses varying from 175-psi to 400-psi, just an even line indicating any pressure that is allowed o build. That is what led me to think its the pump and the tech is in the process of replacing it... so we will see. I have just never seen that pattern before and have never seen pulses with any leaking system. Quote Link to comment Share on other sites More sharing options...
Alex Bruene Posted April 8, 2008 Share Posted April 8, 2008 I find when they go, it almost seems like there is a dead stroke in the pump. The last one I recall doing, would reach about 1000 psi (dead-headed), and would drop to about 200 psi, and keep up that pattern. Quote Link to comment Share on other sites More sharing options...
mchan68 Posted April 8, 2008 Share Posted April 8, 2008 Keith, wasn't there a recent post where someone had replaced a pump on an '03-'04 engine that where the o-ring at pump supply inlet had torn? /forums/images/%%GRAEMLIN_URL%%/2cents.gif Quote Link to comment Share on other sites More sharing options...
snw blue by you Posted April 8, 2008 Share Posted April 8, 2008 Yup, that was me. Click Here I have had many a failed early pump, more than I care to remember. Keith, I hate to ask this, but your tech DID block both rails, right? Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted April 8, 2008 Author Share Posted April 8, 2008 I am not the tech wrenching on the truck but I did instruct him to dead head the engine and handed him both plugs. Quote Link to comment Share on other sites More sharing options...
Tony302600 Posted April 8, 2008 Share Posted April 8, 2008 Dead head the HP system to just the Pump, I had an VERY similar reading and it was a torn o-ring under the pump. Quote Link to comment Share on other sites More sharing options...
slim Posted April 8, 2008 Share Posted April 8, 2008 It has been a couple of years but I recall a guy working next to me having a similar reading. If I remember correctly the o-ring at the bottom of the screw in stand pipe was torn. Quote Link to comment Share on other sites More sharing options...
Jim Warman Posted April 8, 2008 Share Posted April 8, 2008 The pulses have me thinking of the possibilty of a pooched vane in the HPOP.... Icp ramps up and when the bad vane comes around, it dumps.... Any crap in the IPR? Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted April 8, 2008 Author Share Posted April 8, 2008 None reported, and that was discussed. Quote Link to comment Share on other sites More sharing options...
Brad Clayton Posted April 8, 2008 Share Posted April 8, 2008 The first '03 pump I replaced came with a new cover. I was a little confused until closer inspection revealed that the original cover was putting pressure on the discharge tube. The new cover had a notch in it to give some clearance. Just something that comes to mind not sure if it has any relavance. Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted April 9, 2008 Author Share Posted April 9, 2008 It was the pump and because I am the type that HAS to know WHY I ripped the pump apart to see what I could find and found broken stuff. This part spins inside the pump and houses the seven pumping elements. I thought I had a HPOP guide that showed the pump broken down but I cant find one in the hundreds of documents I have. Anybody know what this part is called? Is there a pump manual/guide/book? EYE CANDY! Quote Link to comment Share on other sites More sharing options...
LARRY BRUDZYNSKI Posted April 1, 2009 Share Posted April 1, 2009 Keith this part is the Carrier for the cups in the pump. I spoke with my fuel shop manager and we are going to take one apart so I can take some pics of it. Maybe Bruce has one of those great cutaways in his barn. Quote Link to comment Share on other sites More sharing options...
Bruce Amacker Posted April 2, 2009 Share Posted April 2, 2009 You mean like dis? This is actually a DT530 HPOP, similar to a 7.3 and early 6.0. Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted April 2, 2009 Author Share Posted April 2, 2009 Bruce you know how I like cutaways. I.... I.... I think I love you! Quote Link to comment Share on other sites More sharing options...
robp823 Posted April 2, 2009 Share Posted April 2, 2009 Yea Bruce your cut-a-ways are awsome! Quote Link to comment Share on other sites More sharing options...
LARRY BRUDZYNSKI Posted April 2, 2009 Share Posted April 2, 2009 Bruce if you come by on the 23rd I think I have some stuff you might be interested in cutting up. Quote Link to comment Share on other sites More sharing options...
blown99 Posted April 3, 2009 Share Posted April 3, 2009 Isn't that a cutaway of a 7.3 pump not the 530? Dual output ports give it away as being a 7.3pump. Not that it really matters though. Nice cutaways though! Quote Link to comment Share on other sites More sharing options...
Aaron Posted April 3, 2009 Share Posted April 3, 2009 International Tech Diamond Certified Cummins Certified Sounds like you'd be the guy to know, for sure Quote Link to comment Share on other sites More sharing options...
Bruce Amacker Posted April 3, 2009 Share Posted April 3, 2009 You're right, I think it's actually a mishmash of parts. I was thinking DT by the small gear, but the dual outlets definitely says 7.3/T444E. Maybe it's a 7.3 pump with a DT drive gear. That's the only cutaway I have that I didn't build myself personally. Quote Link to comment Share on other sites More sharing options...
Aaron Posted April 3, 2009 Share Posted April 3, 2009 Your cutaways are the coolest things, ever. Quote Link to comment Share on other sites More sharing options...
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