NHC250 Oil Cooler

[Gamagoat1]

The TM says to assemble the oil cooler you must align the manufacturer'e index marks. Cool, I have one mark (0) on the housing nothing on the element.
Now what? Anybody indexed their oil cooler lately?
Cummins says the older models didn't have to but the manual says do it. It's an 89 so it's not that old.
Any ideas???????????/

 

[Andydieselpower]

oil cooler

Mike,
We took off our oil cooler about 10 months ago on our NHC250 in our M812. It was clocked wrong by the military at some point causing a restriction which wouldn't allow the oil pressure to build up as the RPM's increase. Let me see what I can find for you as I have the info from Cummins. They had to dig a bit to get it for me as the NPower guys in MSP aren't working on NHC's everyday as you can imagine. Make sure you get the new brass rings, etc. from Cummins. I won't be able to scan anything until I got back to work on Monday for you.
Andy

 

[Gamagoat1]

Thanks Andy,
I have new O rings and retainers,just no index marks on the element. I'll wait till I hear from ya.
Thanks again!!

 

[WillWagner]

I have a manual...but it is also at work. If Andy doesn't get an image for you, I most likely can. You have to look hard sometimes. The mark is there, but most of the time it is very poorly done and very faint.

 

[Gamagoat1]

Thanks Will,
I took it to Rocky Mountain Cummins and they couldn't see it. There is a ding in the edge but it doesn't look factory. There are also some marks like " ( " on both ends in the same area.

 

[Andydieselpower]

Attachment from Cummins NHC Manual

Hope this helps!
Andy

 

[Gamagoat1]

Thanks Andy!!!!!!!!

 

[timgc78]

Hello gentlemen, I'm about to install an oil cooler on my m813 nhc Cummins. Is there anything I need to know to get it back together correctly?