Injector breakdown - Diesel Bombers



5.9L 12V Performance Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps Related to Performance and Longevity

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  #1  
Old 02-09-2010, 07:37 PM
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Default Injector breakdown

Marker - part name
Black - shim
Red - compression spring
Green - compression pin
Blue - intermediate disk


Marker - part name
Black - feed passage
Red - alignment pins
Green - pin opening/pintle


Marker - part name
Black - needle guide
Red - pin
Green - pintle tip

In this picture the needle guide has 3 basic functions; to support the pintle in it's movement, to control the return rate, and also to control the allowed vertical movement of the pintle. If the tolerance is lost between the nozzle and guide, the pintle will stick open, foreign debris is often the cause. Removing material from the upper edge of the needle guide, also known as the stroke-limiting collar, will increase the allowable vertical movement. The pintle tip can also be ground to increase the dead volume in the nozzle tip if in a VCO style, or blind-hole if in a Sac style.

Marker - part name
Black - pintle seat
Red - sac/blind-hole

This picture shows a closer view of the tip style, this particular nozzle is a Sac style with cylindrical blind-hole.

Last edited by Smokem; 02-10-2010 at 09:44 AM. Reason: Automerged Doublepost
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  #2  
Old 02-09-2010, 07:46 PM
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Weston...
Nice photo's of a injector taken apart.......Andy
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  #3  
Old 02-09-2010, 07:48 PM
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There will be notes, when I get some more time...It may get a bit technical.

Last edited by Smokem; 02-09-2010 at 07:57 PM.
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Old 02-09-2010, 07:51 PM
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thats good. nice pics
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Old 02-09-2010, 08:11 PM
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Quote:
There will be notes, when I get some more time...It may get a bit technical.
Keep them coming,you can not get too technical for me.

What injector are you showing torn apart?.
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  #6  
Old 02-09-2010, 08:19 PM
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Spare body I had laying around, but somehow I think you are interested in the nozzle, it is from a Cummins 5.9L application, soon to be sporting 8 spray orifices.
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Old 02-09-2010, 09:26 PM
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im deffinately waiting till u get more indepth here weston.
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Old 02-10-2010, 05:14 AM
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This is great to see , thanks for posting
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Old 02-10-2010, 05:49 AM
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Thank you weston
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