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Date:         Fri, 10 Aug 2007 20:08:24 -0600
Reply-To:     Paul Chubbuck <paul@TAKINGFLIGHT.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Paul Chubbuck <paul@TAKINGFLIGHT.NET>
Subject:      Dometic woes
Content-Type: text/plain; charset="us-ascii"

I have just pulled the fridge yet again.

By removing the air tube, I conclude that most of the resistance in the pump is the friction of the rubber against the walls of the piston, not the air resistance.

I removed the pump again, cleaned it, and then replaced it using a light machine oil this time. Last time it was silicone spray. It is slightly improved now, but still sticky, not nearly as easy to pump as the pumps on the old Coleman white gas stoves, which are a very similar design. It is, as far as I know, the original pump. The rubber diaphragm is not degraded in any apparent way. It's just very tight in the cylinder. Any ideas on how to loosen this up?

As for the possibility that the thermocouple is not in alignment with the flame: anyway to test that theory without opening the firebox? I just worked really hard earlier today to caulk that firebox tightly closed and really hate to re-do that.

Thanks,

Paul


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