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Old 06-18-2015, 09:16 AM   #1
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ISC AC Idler pulley

I have a 2000 American Eagle with a Cummins ISC 350
This engine has the AC on top of the engine at the rear.
The AC is powered by a V belt.
This V belt goes over a simple IDLER pulley

Does anyone have a part number for this?
Even perhaps an alternate common part for the Cummins part?

thx Dale
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Old 06-18-2015, 09:37 AM   #2
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I don't believe the idler is a Cummins part.
Another member with a similar set up had called Cummins , about removing his belt, and they told him his A/C had to be driven by the serpentine belt.
Have you had the idler off the engine ?
There may be part numbers on the back side , or the bearing may be replaceable, by removing a snap ring on the back side.
Does your set up look like this?
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Old 06-18-2015, 10:49 AM   #3
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On my 02 isc the ac tensioner pulley is a NPD 0474002110. However that's on a freightliner chassis
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Old 06-18-2015, 06:09 PM   #4
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I went by the local cummins service place here and they took one look at the pulley and said "not a Cummins part"

My guess it must have been installed by Spartan.

I then went to a local parts store who combed their shelves and came up with something very close. I plan to look at it closely tomorrow and see if it is usable.

My system is similar to the one shown in the picture on the other post -- but not exactly the same.

If this works I will take a pix -- and post the part number of the one I got from the auto parts store ---

let you know --- thx Dale
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Old 06-18-2015, 08:30 PM   #5
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Hey, Dale, it isn't quite the same, but the picture sure looks like what is on my ISB. When I bought my coach, the dash air didn't work, so began investigating, and found the idler was completely gone! After looking it over closely, I found the old idler laying on the frame, I took it to my local AGCO dealer, and it was the same one used on a 6175 White tractor! Amazing sometimes how things work out.
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Old 06-19-2015, 11:53 AM   #6
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I installed the new pulley today

first here is what the final install looked like



next here is the old pulley --front had the only numbers



I used a small plastic caliper to add one common flat washer behind the new pulley to have it line up correctly.



finally -- this is the box with the number of the pulley I purchased and installed



maybe someone will find this useful in the future through a site search
thx Dale
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Old 06-19-2015, 06:32 PM   #7
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Nice job!!!!
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Old 06-19-2015, 08:34 PM   #8
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Dale only one comment , it would appear that the belt is too long, judging by the visible slot in the slide mount.
I know , I'm just picky. Glad you're fixed up and mobile.
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