| Dana compressor air filter issue [message #127967] |
Mon, 30 May 2011 08:05  |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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Executive Summary:
The foam air filters in the back of a Dana pump can decompose and mess up the compressor. I am not going to install the replacements. The air inlets should be protected if you live in mud dauber country.
The Story:
I really lucked out when I stumbled onto a my coach. The current owner had taken care of the important things and the PO to him (a relation to his wife) had been very conscientious and had amassed a very serious collection of spares. One thing he did not do and I did not catch was to connect the pump air inlets to the hose that leads (used to, I removed it when I didn't know what it was) up into the cab. You will find out why that mattered down the page.
Among the spares were three air pumps. One, I am given to believe is the OE. There was a Dana installed when I took ownership. There was also a spare used Dana and a NIB (tagged Hadley) in a Gateway box. There was also a still sealed Gateway rebuild kit. (Did I get a great PO or What?)
Two years ago, as we were leaving the local fireworks event, the pump ran way too long to bring the road trim. I swapped in the used pump from spares. During a small project time in the interim, I tried to take the head off the removed pump and the head bolts all sheared. I shelved that rebuild project.
This spring that pump took too long. Well, this summer is already a lost cause, so I pulled the pump out, with the plan to diagnose the two and hopefully rebuild one. (The NIM is a treasure in my book, to be held in reserve until it is really needed.)
I tore down the older pump first (after reading the sparse Gateway instructions and reading the nice page from Patrick Flowers). The filters were both gone and the inside of both pumps including the pistons and valves were coated with the goo that had once been those filters. I have had this same experience with foam filters in other applications. There was also a mud plug in one of the air inlets.
Except that both heads unscrewed, the condition with the recently removed pump was almost identical. The interior of both pumps were covered with air filter goo, but some of both were still in the inlet cap. I rebuilt it with the Gateway kit.
It will be reinstalled it with a small inline fuel filter in the hose that will lead the back up to the cab. It will also be reinstalled with the connecting plumbing somewhat different because I know I can improve the performance with some minor changes.
The pump with the broken fasteners protruding will be a fiddle project for years to come. It will be an ongoing challenge.
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] Dana compressor air filter issue [message #127996 is a reply to message #127977] |
Mon, 30 May 2011 12:51  |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Being in the air filter industry, I have found that there are
different composition of foam. Some look good when new ,but deteriate
after few years.
Same goes with the gasket on the doors on our filter housings.
On Mon, May 30, 2011 at 7:08 AM, Rob Mueller <robmueller@iinet.net.au> wrote:
> Matt,
>
> I replaced the pump in Double Trouble with a Viair that had a remote inlet
> kit.
>
> I ran the hose up behind the dash and connected the filter.
>
> I turned on the ignition and the racket from the pump inlet was terrible.
>
> I moved the inlet filter up under the drivers side hood above the horn as
> high as I could so it would not get soaked if it rained.
>
> I can still hear the pump but not the inlet.
>
> Regards,
> Rob M.
> USAussie - Downunder
> AUS '75 Avion - The Blue Streak TZE365V100428
> USA '75 Avion - Double Trouble TZE365V100426
>
> -----Original Message-----
> From: gmclist-bounces@temp.gmcnet.org
> [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Matt Colie
> Sent: Monday, May 30, 2011 11:06 PM
> To: gmclist@temp.gmcnet.org
> Subject: [GMCnet] Dana compressor air filter issue
>
> It will be reinstalled it with a small inline fuel filter in the hose that
> will lead the back up to the cab.
> --
> Matt
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Dana compressor air filter issue [message #128018 is a reply to message #127996] |
Mon, 30 May 2011 17:11 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Jim,
IIRC the remote air filter kit came with two spare filters, looks like I'll
put checking the filter on my yearly maintenance schedule.
Regards,
Rob M.
USAussie - Downunder
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Jim Kanomata
Sent: Tuesday, May 31, 2011 3:51 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Dana compressor air filter issue
Being in the air filter industry, I have found that there are
different composition of foam. Some look good when new ,but deteriate
after few years.
Same goes with the gasket on the doors on our filter housings.
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
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GMCnet mailing list
Unsubscribe or Change List Options:
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: Dana compressor air filter issue [message #128034 is a reply to message #127967] |
Mon, 30 May 2011 23:03 |
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mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
Karma: 0
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Senior Member |
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| mcolie wrote on Mon, 30 May 2011 06:05 |
... One thing he did not do and I did not catch was to connect the pump air inlets to the hose that leads (used to, I removed it when I didn't know what it was) up into the cab. ...
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Someone "prior to me" found a "vacuum leak" under the dash and plugged it.
Sure took a long time to pump up the rear suspension!
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
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