Home Forums Hunting & Shooting Hunter's Campfire Diesel mechanics? Help me out

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No matter Cooter, the pressure in a high pressure fuel line is created when the pump energizes which creates the high pressure in the system. A gravity fed system has no pump creating high pressure.

Now go fix your dodge ram.

PS It's only a monkey wrench when a monkey is using it, so go adjust your ram frequency with your monkey wrench






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Ok, you win. I hope to aspire to have some talent and experience like you, and while a work in progress, my shop is clearly not yet at the level of the average Goodyear or Firestone, but I'm doing the best I can.

https://www.instagram.com/germancarrepair_atl/

BTW, what credentials and experience do you have?

Sweet - new IG page to follow.

No matter Cooter, the pressure in a high pressure fuel line is created when the pump energizes which creates the high pressure in the system. A gravity fed system has no pump creating high pressure.

Now go fix your dodge ram.

PS It's only a monkey wrench when a monkey is using it, so go adjust your ram frequency with your monkey wrench






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Ok, you win. I hope to aspire to have some talent and experience like you, and while a work in progress, my shop is clearly not yet at the level of the average Goodyear or Firestone, but I'm doing the best I can.

https://www.instagram.com/germancarrepair_atl/

BTW, what credentials and experience do you have?
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Lol, you have no credibility since you believe that a gravity fed fuel line is a high pressure line. Not that the people in Cootervill can comprehend this. Truth be known I am far more interested in the behavior of quantum entangled particles both enhancing computing ability and in creating a faster and more secure internet and naturally which company has the best chance of taking this new technology mainstream and owning that stock when it happens.

Now go change your fan belt Cooter

It has been almost entertaining reading DO's nonsense ramblings on this thread but at some point it just got boring... I guess he can't understand the difference between a fuel pump and an injection pump and some cars have one or both in their systems....

LOL and you can not comprehend that a gravity fed fuel line is not a high pressure line. Now do try to spin that lieutenant colonel do little

Could you guys just call it a transfer or a lift pump please?

LOL there is no need to lift the fuel when the tank and fuel are already elevated in a gravity fed system.

Ok DorkyOne, you’ve seen my shop. Let’s see what you’ve got. Oh, and what experience and credentials do you have?

I noticed that you studiously avoided that previously. Will you do it again?

Regardless....you people need to agree on your terminology.

I only own dumb stuff that you would never understand, you know like shares of Apple Computer Corporation, But you keep doing those oil changes, furthermore I have never seen your shop, nor am I interested enough to look, nor do I need to brag to a certified and proud brainwashed grease monkey

Uh huh......................

Enjoy Mom's basement...............

My mother died almost 30 years ago, and thanks to Apple and the grace of the good Lord I am retired.

But you keep doing those oil changes for the communist demokraps

My Massey Ferguson had gravity feed down to a fuel pump

Here is a link to the Stanadyne DB4 manual. stanadyne DB4 manual

Another explanation of how the pump works via motortrend: motortrend explain the DB2 pump

I believe the DB4 manual is slightly different than what the OP has (including the number of pumping plunger and possibly a few minor changes), but the beginning of the manual has a great description of how the mechanical pump works, including how that when the plungers are forced in via the cam, shoes and rollers it pushes fuel out the discharge fittings. The amount of pressure inside the injection lines will vary based on items such as: engine/pump speed, amount of fuel being delivered, cam rate, metering valve, line length, line id (typically around .062", except GM which can get upwards of .098"), injector type, injector nozzle hole diameter and injector nozzle opening pressure(not sure what the Allis NOP is).

I have seen peak pressures, with one application I was working on, to be over 1100 bar at the nozzle.....which is impressive for a rotary pump design that is now pushing 70 years old.

Other stanadyne manuals:

Older DM manual: DM manual

DB2: DB2 manual

DE10: DE10 manual

DS pump: DS manual

There is one or two other manuals, CD & JDB pumps, but I cannot find scanned copies online to share and they are really old pumps with most parts now obsolete. And yes, I am too lazy to scan them in as well.......

Ok Dumfuukone, read this basic explanation of how diesel engine fuel injection systems work.

https://dieseliq.com/how-diesel-fuel-injection-systems-work/

Its okay if you don’t understand some of the words or concepts, ask nicely and someone here just might give you a hand understanding.
Well, maybe not since your troll ass has stunk up the place so badly.

BTW, is it ok if I call you Elkmaser?

One issue with your link...it doesn't show the rotary diesel fuel pump which is on the Allis 6060. The link has the newer HEUI and DCR pumps, not the older mechanical pump the OP has.....or what is being argued.

True. But it does illustrate that diesels need high pressure pumps to operate.

You know why your Mom died?

She wanted to, to get away from the embarrassment that is you.

Quick update. Cleaned, changed, or checked all line filters and screens to the injection pump. Also did the same for the fuel return lines and fittings. Slight improvement after working on the return lines. The Stanadyne DB2 injection pump is now coming off for a rebuild, thanks Sackett for all the info and suggestions.

Well flintlocke, 45_100, and sackett were pretty much all correct. It took a while to get this project completed, but we put the new injector pump on today and it fired right up. The old pump had rust inside, a failed ring, and a crack somewhere - all leading to clogs on the return side. FYI a rebuild is $1700 and a rebuilt pump with a core exchange is $1900 these days. Thanks all for the help!