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Old 11-09-2010, 01:15 PM   #1
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Airing Up With Air Compressor

I have an on board ExtremeAire air compressor and when I air up I typically let the 6.0l idle but do advance the idle as I know idling isn't good for the diesel. I was just wondering if anyone was just using their house batteries to run the compressor? I was worried the amp draw would be to great and this is why I keep the SMB running when I air up.
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Old 11-09-2010, 03:46 PM   #2
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Re: Airing Up With Air Compressor

I usually shut down the engine while I air up the tires. I have never had any problems running the batteries down. BTW the compressor draws off the starting batteries not the house batteries, if it was installed by SMB West.

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John
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Old 11-09-2010, 04:22 PM   #3
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Re: Airing Up With Air Compressor

From the Extreme Outback site:

- 30-amp draw at 35psi
- 40-amp draw at 150psi

Pretty substantial draw, so it all depends how long you run the compressor.
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Old 11-09-2010, 04:53 PM   #4
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Re: Airing Up With Air Compressor

I always run the engine at high idle when I use my Extreme AIR. Isn't that why I have the switch?
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Old 11-10-2010, 11:08 AM   #5
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Re: Airing Up With Air Compressor

My ExtremeAire pump runs noticeably faster when the engine is running, so I usually leave mine on.

Total air-up time should be less than a half hour -- is this really too much idling for a diesel?

-- Geoff
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Old 11-10-2010, 01:14 PM   #6
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Re: Airing Up With Air Compressor

My extreme air installed by SMB west won't even turn on sometimes if the van is not running. I always let the van idle when using the compressor!!
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Old 11-10-2010, 02:47 PM   #7
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Airing Up With Air Compressor

A lot of people seem to be over reacting to the diesel idling issue.

Idling it once in a while is normal and won't hurt your engine, even if it's not high idled. The negative effects of not high idling on a regular basis are cumulative but understand, idling your vehicle an hour or two here and there will not hurt it. Idling it for 3-4 hours a day, every day (fleet type use, think parked ambulance), will cause problems without the high idle.
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Old 11-13-2010, 11:01 PM   #8
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Re: Airing Up With Air Compressor

I now have a 200A alternator. No problems with running the Extreme Air at idle but I was told not to run the compressor or winch at idle with the standard alternator. I really don't see a problem if you got to do what you got to do, but before I did the alternator switch, my winch caused the check engine light to come on when I used it to pull some idiots out of a ditch at low idle. YMMV
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Old 11-14-2010, 07:26 AM   #9
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Re: Airing Up With Air Compressor

Is there any reason to be concerned about idling a gas engine while airing up? I have the Viair 450 with a 2.5 gallon tank and a 225A alternator. It took about 20 minutes to air up last time. As stated by Geoff, my compressor also runs faster when the engine is idling.
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Old 11-14-2010, 09:06 AM   #10
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Re: Airing Up With Air Compressor

No problems with idling the gas engine at all. The 6.0l diesels can have issues if low idled frequently due to incomplete combustion and sooting of the EGR valve and VGT vanes.
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