Connector tube information

[BrianAtSmarty]

Examining and comparing the 5.9 to the 6.7l supply tubes, they do have exactly the same geometry of the tightening area where they connect to the injector body.

Also the length from that mating surface to the area where the fastener is contacting the supply tube is exactly the same.



The difference is the inner bore diameter and the outer diameter of the supply tube. As long as it fits into the cylinder head bore it shouldn´t make a difference which version is used.



The F1831 number designates that it is a Bosch part with the number F00FJ01831.



Why the number variation? Perhaps Cummins made a deal with Bosch so Cummins can put their own number on it to give them the option to sell it as a Cummins part.



But it definitely is made by Bosch and it is the tube for the 6.7l Cummins which fits both engines.



Hope this helps!



Thank you!

 

[brods]

Any comment on the following observation from the last time you started a thread on the connector tubes?

Are you sure about that?

There is only 1 P\N available from Cummins. However, the F00RJ01572 still shows as a good P\N from Bosch, according to authorized Bosch service center.

There are literally 100's of places world-wide showing this number as in stock and valid.

 

[cerberusiam]

Yeah, I SUCK at following superceded part number trails thru references.

I have in my possession a Cummins box with the old 6.7 part # taped over the superced to 6.7 AND 5.9 part #, and BBI assuring me the differences should not matter.

Well, guess I will find out if it works and if my install capabilities are up to the task.

 

[BrianAtSmarty]

The material of the 5.9 tubes compared to the 6.7 tubes is indeed a bit different. The 6.7 tube material is slightly harder than the 5.9 tube material. The difference is because of the higher pressures the 6.7 supply tubes are designed for vs the 5.9 tubes. 1800 bar for the 6.7 compared to 1600 bar for the 5.9.

The newer material increases high pressure durability as well as tightening at higher pressures.

As to why the difference in outward appearance, like the later injectors the tubes are now silanized and not phosphated.


As per ShopKey both the 5.9 and 6.7 final torque values are 37 ft lbs.

Thank you!

 

[mwilson]

I did notice that the 6.7 tubes have what appears to be a replaceable screen / filter thingy. I will check that screen part number for validity in the Cummins system later on today.

 

[BrianAtSmarty]

I believe you will find interest in this post:

https://www.turbodieselregister.com/threads/247748-Know-your-Supply-Tubes?p=2392349#post2392349