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Old 05-25-2016, 08:36 PM   #1
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1997 F53 Hose Routing

I am slowly rehabbing this 1997 Fleetwood Bounder on Ford F53 Chassis. I have two hoses I need help connecting properly. The larger hose is missing(?) The "can" it connects to is mounted in front of the engine and can be seen looking into the engine from the front of the RV. With engine running it has air blowing out of it.

The Second hose is a vacuum hose I think and it dangles down on the passenger side of the engine toward the charcoal canisters.

I've attached pictures of both. The "can" in the picture presents as sideways but it is actually vertical. The vacuum hose needing connecting is the black hose with the end against a ground strap in the picture.

Thanks for all help!

Marvin
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Old 05-25-2016, 09:00 PM   #2
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The one (Dump Silencer) in the bottom photo gets no hose. That is how it came from the factory.

The top one I think plugs in under the air intake "H" or into the cleaner box depending on where the other end of the hose goes.
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Old 05-25-2016, 09:35 PM   #3
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Good news on the bottom picture, that leaves me just the smaller hose. I'll track it back and post a picture of it's origin soon. Thanks much!
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Old 05-26-2016, 06:30 AM   #4
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The hose color actually is red, it connects to the intake manifold fitting shown in the not-so-good picture I attached. Looks like (probably a vacuum) port with multiple hoses connecting maybe. The other picture I show displays a place on the air cleaner hose that looks like it has been plugged with epoxy or similar. I'm wondering if it went there and if so what possible purpose it served? (It seems to come out of the hose loom aiming it toward the passenger side of the engine rather than toward the air cleaner.)
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Old 05-26-2016, 08:12 AM   #5
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The vacuum lines should be close to the diagram below but their should be a vacuum routing diagram on the drivers side rocker arm cover (for lack of a better name). There should also be a vacuum line from the vacuum port on the intake manifold going forward of the radiator to a vacuum ball for the vent system.
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Old 05-26-2016, 08:25 AM   #6
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Maybe this will help also:


/
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Old 05-27-2016, 07:23 PM   #7
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Thanks VERY much for your help. The hose presently is plugged by someone before me but the plug is not a factory stopper. However, I'm beginning to think maybe it came plugged from the factory?

I found a canister near the front bumper with four other vacuum hoses going to it, (vacuum canister?) and all of them are properly connected. No venting system seems to need vacuum to actuate it on this rig. It really looks like an orphaned vacuum hose, though that is baffling to me.
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Old 05-27-2016, 08:00 PM   #8
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Quote:
Originally Posted by MarvinG View Post
No venting system seems to need vacuum to actuate it on this rig.
That I do not believe.
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Old 05-28-2016, 08:28 PM   #9
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On my 95 F53 Bounder there is an OEM plugged vacuum hose laying on the right valve cover. I suspect it is for those other brands that need vacuum for their HVAC. In the era of our Bounders, Fleetwood used Denso all electric HVAC. All the HVAC doors are servo controlled.

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Old 05-29-2016, 06:00 AM   #10
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I've come to the same conclusion Richard, thanks for confirming this. I'm going to move on to the next issue! The charcoal canisters were completely inoperative (one missing, connections broken etc.) and I've replaced all that, and wanted to make sure all hoses were correctly connected before moving on to the check engine codes, and the engine pinging/knocking I get from the engine when under load.

A big thanks to all who have helped me so far.
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Old 11-10-2019, 02:18 PM   #11
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Hi Subford,

What exactly is a Dump Silencer? Google is no help except to find this post again ;-)

Thanks!



[QUOTE=subford;3085671]The one (Dump Silencer) in the bottom photo gets no hose. That is how it came from the factory.
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Old 11-11-2019, 07:31 AM   #12
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The Secondary Air Injection system will also dump secondary air to the atmosphere during some operating modes. The Dump Silencer will act like a muffler to quiet the sound it makes during the dump.


The Dump Silencer is the number 20 in post number 6 above.
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Old 11-12-2019, 11:09 AM   #13
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You're the best. Thanks for answering. It all makes perfect sense now that I've looked up secondary air injection.



Quote:
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The Secondary Air Injection system will also dump secondary air to the atmosphere during some operating modes. The Dump Silencer will act like a muffler to quiet the sound it makes during the dump.


The Dump Silencer is the number 20 in post number 6 above.
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