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Old 11-16-2013, 09:05 PM   #29
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Originally Posted by RV Wizard View Post
None - pre EPA regulated
Thank you for the informative response.

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Old 11-16-2013, 09:11 PM   #30
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Originally Posted by SonnyB View Post
I,ve heard shelf life of def is 6 months, rue or false?

False, Cummins states in their maintenance manuals that DEF fluid has a useable life of 24+ months when stored at temps below 90F, and will degrade quicker when stored above 90F.

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Old 11-17-2013, 06:15 AM   #31
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Another uneducated question here. If you do end up operating your coach in cold weather like going over high mountains and it does freeze, does it quit running? Or does it just quit cleaning the emissions?

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Old 11-17-2013, 08:01 AM   #32
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The DEF tank has a heater probe in it. If you are running, the DEF being used should not be frozen. If it does you have other problems. I think what I remember from the Camp Frieghtliner class is, when the block heater is on prior to engine start you are also turning on the DEF heater.

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