| 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:
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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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