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Old 01-16-2016, 04:52 PM   #1
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Changing Multiple Fuel Filters?

I see threads about bad running diesel engines being cured by changing fuel filters, sometimes multiple times. I've been driving diesel trucks almost 20 years and have only changed fuel filters as part of preventive maintenance. Why do motor homes have issues with them?
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Old 01-16-2016, 04:54 PM   #2
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Allowed to sit for long periods of time with fuel aging and moisture accumulating. Or buying from out of the way stations that have the same problem.
A truck being driven will use up it's fuel pretty regularly and will usually fuel up at a high volume truck stop.
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Old 01-16-2016, 04:58 PM   #3
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Mine sits all winter, inside a garage.......never one problem.other diesel equipment in there also, sitting. The answer to your question of filter changes is "Water in the Fuel"........then bacteria will form and grow, plugging the filter's. The key is to keep your tank full at all times when sitting for long periods, especially where it is humid.
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Old 01-16-2016, 05:11 PM   #4
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Because the fuel will age up when sitting and plug the fuel filter. Had this happen to me on I10 in LA. Pulled into Froggies for the night and went to the parts store and replaced them. No more issues.
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Old 01-16-2016, 07:13 PM   #5
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Quote:
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I see threads about bad running diesel engines being cured by changing fuel filters, sometimes multiple times. I've been driving diesel trucks almost 20 years and have only changed fuel filters as part of preventive maintenance. Why do motor homes have issues with them?
Rely on your 20 years trucking experience to guide you. As you know, buy clean fuel, don't let your fuel system get contaminated, take precautions for gelling and such and the engine manufacturers change interval recommendations should keep you out of trouble. I let my commercial fleet maintenance experience guide my motor home maintenance decisions. Fuel filter changes on this unit are per manufacturers recommendations, I really stretch them out on my diesel pickup without problems.
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Old 01-16-2016, 08:59 PM   #6
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Old fuel from low volume diesel fuel stations and not adding a biocide when the fuel sits for a long time.
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Old 01-19-2016, 03:20 PM   #7
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Thanks for the replies. Is there any easy way to drain water and crud out of a tank?
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Old 01-19-2016, 03:42 PM   #8
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Is there any easy way to drain water and crud out of a tank?
Not usually, fuel scrubbing or total drain and suction cleaning work.
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Old 01-21-2016, 09:37 PM   #9
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Thanks for the replies. Is there any easy way to drain water and crud out of a tank?
Depending on your fuel filters, there may be a drain under the clear cup of the larger of the filters.
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