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Old 07-19-2006, 06:27 PM   #1
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I have a new coach with a 400 ISL Cummins and Allison 6 speed. In trying to climb I-70 west of Denver I experienced overheating. Cummins said Chasis problem and sure enough there were 2 bulletins regarding overheating. One was a shield and more vents and the other was a larger hydraulic cooler. After two weeks in the shops I still have the same problem. And downshifting to keep rpm's past 2000-2003 only helps on short climbs. Everyone is passing the buck so could there be any other fixes?
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Old 07-19-2006, 06:27 PM   #2
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I have a new coach with a 400 ISL Cummins and Allison 6 speed. In trying to climb I-70 west of Denver I experienced overheating. Cummins said Chasis problem and sure enough there were 2 bulletins regarding overheating. One was a shield and more vents and the other was a larger hydraulic cooler. After two weeks in the shops I still have the same problem. And downshifting to keep rpm's past 2000-2003 only helps on short climbs. Everyone is passing the buck so could there be any other fixes?
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Old 07-20-2006, 04:23 AM   #3
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It's something that ends to pop up on class A's wiuth the 400ISL on a Freightliner chassis.
You might want to try This Link to follow another thread on that subject.
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