Can I remove fuel pump for overhaul?

[MooneyBob]

Since my mechanic is not available right now, can I remove the boost pump from my J, send it for overhaul and then have my mechanic to reinstall it? Any paperwork needed in this point?

[MooneyBob]

I have removed the panel and it looks pretty easy to get it out.

[larryb]

You can remove it. And you can reinstall it too. All your mechanic needs to do is inspect your work and sign the logbook.

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[Alan Fox]

You can do anything you want to , having it signed off is quite another story , I would not reinstall it until you can talk to your IA ....as far as removal , most IAs would be cool with it....

[N201MKTurbo]

You don't need an IA, An A&P can return it to service.

[jrwilson]

Just turn the fuel selector off

[BTR]

I removed and replaced mine a few months ago. I checked with my A&P first and he had no problem with me doing the work and having him inspect before signing off. It does take a little more time going back in than coming out so take your time and it's no big deal. Consider going back with the Weldon pump. It's an approved direct replacement, is less expensive new than rebuilding the Dukes and has some other advantages. I will admit the Weldon doesn't have the sexy purr that the Dukes has.

[DrBill]

HINT:    Loosen the fuel lines first then remove the bracket.  My mechanic just did mine.  Installation:  fuel lines loose on first then the bracket then tighten fuel lines.

BILL

[cliffy]

What Bill said Just talk to your A&P first Shouldn't be a problem. Be sure to leak check it before you close it up.

[MooneyBob]

I removed and replaced mine a few months ago. I checked with my A&P first and he had no problem with me doing the work and having him inspect before signing off. It does take a little more time going back in than coming out so take your time and it's no big deal. Consider going back with the Weldon pump. It's an approved direct replacement, is less expensive new than rebuilding the Dukes and has some other advantages. I will admit the Weldon doesn't have the sexy purr that the Dukes has.

Did you have to replace any fuel line and fitting with the Weldon?

What model of Dukes did you replaced?

Thanks.

[BTR]

I don't have the model numbers with me now. I called Weldon an spoke with them, gave them the year and model of the plane and the model of the pump. They assured me it would be a direct drop in replacement. The were correct. The screws, inlet and outlet was exact. They told me the Weldon model I would need and I ordered from aircraft spruce. The Dukes pump requires the screen filter inline between the pump and the engine. Even though it's not required, there is no need to take it out as everything will fit back as before. I understand some of the earlier year models required modification to change pump brands. The Mooney service and parts manual will also help identify what you'll need.

Found this pic with model number. 4140-00-19A

Edited January 6, 2015 by BTR

[HopePilot]

At how many hours is it recommended that you pull it for overhaul?

[MooneyBob]

At how many hours is it recommended that you pull it for overhaul?

My started to drop the fuel so it is time for the overhaul / new one.

[BTR]

Dukes says 10 years and intermittent use only. I don't remember any time limitation on the Weldon and it can be run constantly ( in case it accidentally gets left on longer than it should after take off).

[RobertGary1]

Be aware that if your selector has not been overhauled in sometime it's very likely it will drop in the off position when the pump is removed. A trivially easy R&R but you'll need to understand the fitting torque procedures, etc ("standards and practices" apply as always)

[FloridaMan]

HINT:    Loosen the fuel lines first then remove the bracket.  My mechanic just did mine.  Installation:  fuel lines loose on first then the bracket then tighten fuel lines.

BILL

 

Just make sure they're not leaking. I met a guy a couple weeks ago who lost all his fuel after a fuel pump replacement and wrecked his airplane due to fuel exhaustion. 

[DrBill]

Here's what the Dukes lookes like.. The new Weldon is an exact match of form and fit.   The 8163 Weldon used one J's and others is bigger.

Bill

http://mooneyspace.com/topic/13077-dukes-pump-from-e-model-for-sale/

[Mooneymite]

When the Dukes fuel pump starts leaking from the small drain hole below it, I understand it is a leaking diaphragm.

 

Has anyone disassembled the pump to see what this diaphragm looks like and if it can be replaced without overhauling the entire pump?  I suspect the supply of parts is a closely held secret based on what some shops charge for the overhaul.

 

An electric pump that is run as little as theMooney fuel pump (except for those of us who habitually forget to turn it off!), should last approximately 100 years.  Too bad the thing starts leaking after about 10 years.

[N601RX]

The dukes used on the injected motors is a vane style pump.  The shaft seal is spring/pac-seal style.  DG has developed its own overhaul procedures using non Duke parts so the seals are available from somewhere.

[N201MKTurbo]

The seal that leaks is inside of item 4

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[Mooneymite]

The seal that leaks is inside of item 4

 

 

So do I use WD-40, or duct tape?  I'm so confused....

 

Actually, I am interested in replacement parts for the Dukes pump for carbureted engines....anyone got that parts list?

[jetdriven]

No you pay 1300$ and, in our case, it is leaking after two flight hours.

[Mooneymite]

No you pay 1300$ and, in our case, it is leaking after two flight hours.

 

Oh, no!

 

But that's the high pressure Dukes, right?

[jetdriven]

Yes. After laying out 1800$ which was a third fuel pump outright with core charge (no cores available) they sent us our original pump back overhauled. After a few weeks the 1800$ Back as well.