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Old 03-04-2014, 09:27 AM   #1
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Help - Can't Access Air Filter

Have a 2002 Allegro Bus with the cummins 330 (rear radiator). I appears that the air filter has never been changed . The shop (Cummins Power South - Jax, FL) wants to take a torch and cut out the exhaust in order to reach the filter so they can change it.

My question is; Is it really that impossible to get to and change? Are there NOT any instructions available on how to go about changing the air filter which should be changed every 2 years? I find it difficult to believe Tiffin would design a coach in such a way.

Any help from someone who has had theirs changed or knows how would be greatly appreciated.

Thank you.
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Old 03-04-2014, 12:15 PM   #2
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Many TMH coaches have a removable panel in the compartment adjacent to the filter to assist in gaining access. You probably won't see it from the outside because it is covered with insulation or undercoating.
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Old 03-04-2014, 12:16 PM   #3
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This should be interesting. Very hard to believe a filter is that hard to change.
Have you called Tiffin to verify?
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Old 03-04-2014, 12:25 PM   #4
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Spoke with Tiffin yesterday. They indicated that it was indeed a difficult change out (estimated 1.5 hrs). But they said you had to disassemble the housing not cut out the exhaust. 4 hours of labor to cut it out! This is going to be a costly air filter to be sure.
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Old 03-04-2014, 12:29 PM   #5
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Arrow Oh boy....

Quote:
Originally Posted by gatorcruz View Post
Spoke with Tiffin yesterday. They indicated that it was indeed a difficult change out (estimated 1.5 hrs). But they said you had to disassemble the housing not cut out the exhaust. 4 hours of labor to cut it out! This is going to be a costly air filter to be sure.
Got to just love those engineer's
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Old 03-04-2014, 12:40 PM   #6
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guess you know now why it's never been changed
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Old 03-09-2014, 07:30 PM   #7
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Hard to believe anyone would let the air filter go un changed for almost 12 years ?
Then be told by a cummins service that the exhaust had to be cut to replace it ?????
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Old 03-10-2014, 06:44 AM   #8
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well, 12 hours of labor and $2k later it has been changed (along with annual service including gen). I saw the thing and it was caked with dirt. The tech told me that if the air flow restriction indicator shows OK, then they don't change it. It's my belief that it doesn't work and the filter hasn't been changed (but I can't be certain). Anyway, it's running great now.
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Old 03-10-2014, 11:10 PM   #9
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Quote:
Originally Posted by gatorcruz View Post
well, 12 hours of labor and $2k later it has been changed (along with annual service including gen). I saw the thing and it was caked with dirt. The tech told me that if the air flow restriction indicator shows OK, then they don't change it. It's my belief that it doesn't work and the filter hasn't been changed (but I can't be certain). Anyway, it's running great now.
If that's what they told you, they are wrong and are not following the FL maintenance schedule. Those filters have a "time life" as well as an "in service life" and should be replaced at prescribed intervals if they are dirty or not. If the filter starts to come apart due to age, you and your engine are going to have big time problems.

All that they (or you) have to do is read the book.
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Old 03-11-2014, 05:02 AM   #10
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I think I would have replaced it with a K&N HD filter.
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