FW: [COUPERS-TECH] fuel pump

[Ed Burkhead]

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This message was automatically forwarded on behalf of Bill Bayne.  Please address any responses to the mail list or directly to Bill at: [EMAIL PROTECTED]  

 

 

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From: William R. Bayne [mailto:[EMAIL PROTECTED]
Sent: Sunday, February 05, 2006 9:24 PM
To: Ed Burkhead
Subject: Re: [COUPERS-TECH] fuel pump

 

rlytech

Hi Randy,

I understand. Here's the basics. Remember, I'm not a certificated mechanic.

The number stamped on your pump is the last four numbers of the "official" model number given the device by its manufacturer, A.C., a company also well known for making auto parts. In fact, your pump is an auto part, always was, always will be. Fred Weick (and Continental Motors) picked this pump because it was capable of doing the job, and the CAA (Now FAA) agreed when they approved the Ercoupe model 415-C by amending Aircraft Specification 718 (for the Ercoupe model 415) to include it.

The numbers I gave are in the Type Certificates for all Ercoupes because they are the pumps fitted during Erco manufacture (or the direct successor to said pumps). Later on, A.C. changed their numbering system, and today the numbers are different for the same pump. That, I believe, is why there are more numbers on the type certificates today than in the Continental Parts book (which was never revised to include the new numbers). These pumps are the only ones "legal" on an Ercoupe without a 337 or STC to fit something else.

The "big debate" was about the "legality" of buying overhaul kits from the local auto store and "Chinese parts" in these old A.C. pumps (which they fit). You may find yourself having this debate all over again with your mechanic. Ercoupe Service Memorandum No. 42 specifically states: All fuel pump parts necessary for repair are available from the Continental Motors Corporation, and AC Automotive Service Stations."

Well, guess what? "AC Automotive Service Stations" have gone the way of "full service" and 80/87 gas, so the owner can purchase the "or equal" auto parts available today for his/her pump. The technology of these simple devices considerably predates "rocket science".

The automotive rebuild kit for these pumps sometimes contain parts to repair a range of A.C. pumps. Compare what's in the kit to what's in the pump. Find replacements for existing gaskets, screens, diaphragm, etc., and toss the excess. Of course, you might first want to close the windows and pull down the shades ;-) One important difference, though. The new screws may not be drilled for safety wire, and you DO need screws that are. Fortunately, these are easy to come by inexpensively if any of yours cannot be re-used.

People forget that these are not "fuel pumps" on which the engine depends to operate. Our engine is fed by gravity from the nose tank, which is kept full by this TRANSFER pump. If one fails, you have over an hour to notice the cork wire heading down and find a good place to land. No big deal except for those already brain dead that don't routinely watch their nose tank bobber.

If your mechanic doesn't understand what I said in my original message (the part below), he/she has no experience with older airplanes.

Good luck,

William R. Bayne
<____|-(o)-|____>
(Copyright 2004)

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On Feb 5, 2006, at 19:02, Randy Hougham wrote:

Bill,
My mechanic is questioning wheather or not the pump that I have is actually an ercoupe pump.All the numbers that you gave me are over my head. How can I tell by looking at the pump if it belongs on my plane? And How do I know what rebuild kit to order. I remember a few months ago there was a big debate on this sight about rebuild kits and different springs and diaphragms,etc. for different applications. Thanks for any help you can give.
Randy Hougham
NC87384

 

Hi Randy,

The full A.C. Part Number of your pump is A.C. 1539867, Continental Pr. No. 40585.
Per Continental Service Parts Catalog X-30011, it is for the C75-12 & 12F, C85-12 & 12F...

 

Regards,

William R. Bayne
<____|-(o)-|____>
(Copyright 2004)

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On Feb 5, 2006, at 11:05, Randy Hougham wrote:

Hi All,
My mechanic is looking for a part number on the fuel pump. I can find
a number 9867 stamped into it and a couple of cast in numbers. He
says the part # should be something else. Can anybody help?

 

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