MooneyBob Posted January 5, 2015 Report Posted January 5, 2015 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? Quote
MooneyBob Posted January 5, 2015 Author Report Posted January 5, 2015 I have removed the panel and it looks pretty easy to get it out. Quote
larryb Posted January 5, 2015 Report Posted January 5, 2015 You can remove it. And you can reinstall it too. All your mechanic needs to do is inspect your work and sign the logbook. Sent from my iPad using Tapatalk 1 Quote
Alan Fox Posted January 6, 2015 Report Posted January 6, 2015 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.... Quote
N201MKTurbo Posted January 6, 2015 Report Posted January 6, 2015 You don't need an IA, An A&P can return it to service. Quote
jrwilson Posted January 6, 2015 Report Posted January 6, 2015 Just turn the fuel selector off 2 Quote
BTR Posted January 6, 2015 Report Posted January 6, 2015 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. Quote
DrBill Posted January 6, 2015 Report Posted January 6, 2015 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 1 Quote
cliffy Posted January 6, 2015 Report Posted January 6, 2015 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. Quote
MooneyBob Posted January 6, 2015 Author Report Posted January 6, 2015 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. Quote
BTR Posted January 6, 2015 Report Posted January 6, 2015 (edited) 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 1 Quote
HopePilot Posted January 6, 2015 Report Posted January 6, 2015 At how many hours is it recommended that you pull it for overhaul? Quote
MooneyBob Posted January 6, 2015 Author Report Posted January 6, 2015 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. Quote
BTR Posted January 6, 2015 Report Posted January 6, 2015 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). Quote
RobertGary1 Posted January 6, 2015 Report Posted January 6, 2015 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) Quote
FloridaMan Posted January 6, 2015 Report Posted January 6, 2015 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. Quote
DrBill Posted January 8, 2015 Report Posted January 8, 2015 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/ Quote
Mooneymite Posted January 8, 2015 Report Posted January 8, 2015 When the Dukes fuel pump starts leaking from the small drain hole below it, I understand it is a leaking diaphragm. Â Has anyone disassembled the pump to see what this diaphragm looks like and if it can be replaced without overhauling the entire pump? Â I suspect the supply of parts is a closely held secret based on what some shops charge for the overhaul. Â 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. Â Too bad the thing starts leaking after about 10 years. Quote
N601RX Posted January 8, 2015 Report Posted January 8, 2015 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. Quote
N201MKTurbo Posted January 8, 2015 Report Posted January 8, 2015 The seal that leaks is inside of item 4 Sent from my LG-C800 using Tapatalk 2 Quote
Mooneymite Posted January 9, 2015 Report Posted January 9, 2015 The seal that leaks is inside of item 4 Â Â So do I use WD-40, or duct tape? Â I'm so confused.... Â Actually, I am interested in replacement parts for the Dukes pump for carbureted engines....anyone got that parts list? Quote
jetdriven Posted January 9, 2015 Report Posted January 9, 2015 No you pay 1300$ and, in our case, it is leaking after two flight hours. Quote
Mooneymite Posted January 9, 2015 Report Posted January 9, 2015 No you pay 1300$ and, in our case, it is leaking after two flight hours. Â Oh, no! Â But that's the high pressure Dukes, right? Quote
jetdriven Posted January 9, 2015 Report Posted January 9, 2015 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. Quote
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