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Old 05-01-2012, 10:33 AM   #1
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Problem with serpentine belt-1999 39z Cummins 5.9/275hp

Hi
I had my serpentine belt break a while back & thought I would not have a problem replacing it, no so. The new belt will not reach around, it is about 4" short. I have had a few more knowledgeable friends look at it without success. The routing is correct & the belt is the same length
as the old one. Someone told me they thought there is a special technique to it but they didn't know what is was. If anyone has any ideas it would be much appreciated as I have to sell the coach and I can't show it to prospective buyers not running.
Many thanks.
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Old 05-01-2012, 12:33 PM   #2
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Paul: If you have used the belt tensioner to mount the belt, disregard...

From the ISB Operation Manual:
"The belt tensioner adjusts with a 3/8th or 1/2 inch square drive and a long handle. It winds in the direction that the tang is bent over the tensioner body. To get the belt on- rotate the tensioner to wind the spring tighter.
Applying excessive force in the opposite direction of windup or after the tensioner has been wound to the positive stop can cause the tensioner arm to break."
http://www.fixya.com/cars/t7527956-i...t_5_9_cummings

With the correct belt, mine went on easily once I had a long enough handle to move the tensioner...My tensioner moved clockwise to get the belt on.
Hope this helps.
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Old 05-02-2012, 08:53 AM   #3
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Quote:
Originally Posted by Hooligan View Post
Paul: If you have used the belt tensioner to mount the belt, disregard...

From the ISB Operation Manual:
"The belt tensioner adjusts with a 3/8th or 1/2 inch square drive and a long handle. It winds in the direction that the tang is bent over the tensioner body. To get the belt on- rotate the tensioner to wind the spring tighter.
Applying excessive force in the opposite direction of windup or after the tensioner has been wound to the positive stop can cause the tensioner arm to break."
installing a power belt on a 5.9 cummings desiel - FixYa

With the correct belt, mine went on easily once I had a long enough handle to move the tensioner...My tensioner moved clockwise to get the belt on.
Hope this helps.

Hi Hooligan.
Thank you. I will follow the directions & be careful of the tensioner. I appreciate your help.
Paul.
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