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Old 05-27-2024, 01:52 PM   #1
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What are these electronics boxes under the Spirit 22r?

This is a 2022 Spirit 22r that is on a 2021 Ford E350 Super Duty.


On the underside of the chassis on the driver's side a little back from the driver's seat (but on the underside, not in the cab) are the boxes pictured here. One has fans. It's all exposed to the elements and road. What are they?


Thank you for your help.
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Old 05-27-2024, 02:14 PM   #2
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Best guess from here would be part of the engine emissions system.
The only "REAL" info might be in looking at the part number of the center picture!

2020 FORD F250 F350 6.2L LC34-9E857-BF FUEL VAPOR CHARCOAL EVAP CANISTER OEM
Looks the same part except it being a -E instead of this -BF for a different year?
Any other parts labels you could search out?
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Old 06-02-2024, 07:19 PM   #3
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Thanks for your help. I suppose the canister makes sense but I'm really surprised about fans exposed to the road like that. I'll look around for more numbers. Thanks again.
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Old 06-02-2024, 08:08 PM   #4
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The unit with the fan is an ARB On-Board Air Compressor. It's a dual and a very nice compressor costing $600- $700. I have a single under the hood of my Jeep but I'd just about kill for a dual like that on my motorhome.
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Old 06-02-2024, 08:16 PM   #5
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Oh and you don't have to worry about it being exposed to the elements, see bullet point #9 below. Of course if you don't like it I'll be glad to take it off your hands

It does have 2 replaceable filters on the back side under the plastic twist on covers.

BTW does your E350 have air bags?
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