Profileair Posted November 30, 2014 Report Posted November 30, 2014 I have a 1964/E. The vent fitting off the electricity fuel pump started seeping. Just a few drops. Does anyone know what this vent is for?. I have it capped off to stop the dripping on the hanger floor. Ground runs with the cap on appear to have no effect on fuel pressure etc. Engine operation looks normal. Any thoughts. Thanks Profileair Quote
The-sky-captain Posted November 30, 2014 Report Posted November 30, 2014 Sounds like the pump needs overhauled. I had the same issue a couple years ago. Quote
Profileair Posted November 30, 2014 Author Report Posted November 30, 2014 Thanks, just don't know what the vent is for. Quote
carusoam Posted November 30, 2014 Report Posted November 30, 2014 Try this on... http://mooneyspace.com/topic/13706-fuel-dripping-from-this/?hl=%2Bpump+%2Bleak#entry178698 If it is this one, the vent is to allow the fuel to leak out (away from the plane) from a fuel pump that is having technical issues. Best regards, -a- Quote
Guest Posted November 30, 2014 Report Posted November 30, 2014 I have a 1964/E. The vent fitting off the electricity fuel pump started seeping. Just a few drops. Does anyone know what this vent is for?. I have it capped off to stop the dripping on the hanger floor. Ground runs with the cap on appear to have no effect on fuel pressure etc. Engine operation looks normal. Any thoughts. Thanks Profileair The vent fitting is meant to keep the fuel from mixing with the electricity inside the motor. If its leaking from the vent fitting the pump needs repair. Clarence Quote
jfdez Posted November 30, 2014 Report Posted November 30, 2014 Yup for sure, needs an overhaul. Quote
slowflyin Posted November 30, 2014 Report Posted November 30, 2014 +1 for repair. The vent ports the fuel away from the energized half the assembly. Sent from my iPad using Tapatalk Quote
N201MKTurbo Posted December 1, 2014 Report Posted December 1, 2014 The drain fitting is on the dry side of the main shaft seal. If the shaft seal leaks the leakage comes out of the vent port. Quote
Guest Posted December 1, 2014 Report Posted December 1, 2014 It would come out the vent except the poster has capped the vent. Clarence Quote
carusoam Posted December 1, 2014 Report Posted December 1, 2014 Nice point Clarence! ProfileA, seek professional assistance. Re-engineering a fuel vent could prove disastrous. Best regards, -a- Quote
DrBill Posted December 1, 2014 Report Posted December 1, 2014 Yep.. cap the vent and the gas can get into the motor and you could have a fire. I'm selling a used DUKES pump that you can send away, get overhauled and then swap with very little down time. In the Classifieds for only $100. BILL Quote
N201MKTurbo Posted December 1, 2014 Report Posted December 1, 2014 Maybe you could connect a hose to it and feed it back into the fuel tank. :-( Quote
Guest Posted December 1, 2014 Report Posted December 1, 2014 The vent fitting is meant to keep the fuel from mixing with the electricity inside the motor. If its leaking from the vent fitting the pump needs repair. Clarence Edit: I guess I should have been clearer in my post. The vent keeps the fuel from mixing with the electricity, installing a cap defeats the vent and may be dangerous. Clarence Quote
Steve65E-NC Posted December 1, 2014 Report Posted December 1, 2014 First you need to look at your log books and determine if this is the original unit. If it is you will probably have to buy new, buy rebuilt, or change to Weldon. The Dukes fuel pump on my 65E faided about two years ago. I sent it to ???? for an IRAN evaluation. I was told by Russ ?? that it was beyond repair or rebuild. I purchased a new Dukes from Lasar and installed at annual. The change out is pretty easy. I looked at a change to Weldon (instructions are available from Mooney), but decided it was a little complicated. On the other hand, if your pump is more recent,say only 20 years old instead of 50, you might want to consider an IRAN repair and return to service (look in the archives). Apparantly a complete rebuild is very expensive, hard to come by, and often un-necessary. Dukes was purchased at about the time of my experience and I think they have make it difficult to get support. Quote
Yetti Posted December 1, 2014 Report Posted December 1, 2014 http://www.aeromotorsllc.com/aeromotorsllc/ Quote
Steve65E-NC Posted December 1, 2014 Report Posted December 1, 2014 When I replaced my electric fuel pump several years ago (see above), I found the following company to be very helpful in deciding that I needed a new pump. www.dgsupply.com D&G Supply, Niles, Mi. Russell Romey looked at my unit and gave me advice with no charge. I think D&G has a good stock of Duke repair parts. Give them a call. Quote
N601RX Posted December 1, 2014 Report Posted December 1, 2014 Weldon now has a bolt in PMA replacement for the Dukes that is approved for the E,Fand J. $793 new http://www.aircraftspruce.com/catalog/eppages/weldonpmapump08-10717.php 1 Quote
wombat Posted December 1, 2014 Report Posted December 1, 2014 I had the same issue this summer. Bought the new drop-in replacement from Weldon and everything has been peachy since then. Still have the leaking Dukes pump around, don't know what to do with it. Hate to throw it away. Not worth selling as far as I can tell. Quote
BigTex Posted December 1, 2014 Report Posted December 1, 2014 I had the same issue this summer. Bought the new drop-in replacement from Weldon and everything has been peachy since then. Still have the leaking Dukes pump around, don't know what to do with it. Hate to throw it away. Not worth selling as far as I can tell.those pumps have a core value of $400 -$600 so you might contact some of the rebuild shops to see what they'd give you for it. Quote
Profileair Posted December 1, 2014 Author Report Posted December 1, 2014 Thanks to everyone for the info. By the way the cap is to keep the fuel from spilling onto the hanger floor. I'm on a new pump and it sounds $$$$. Thanks again. Quote
Steve65E-NC Posted December 2, 2014 Report Posted December 2, 2014 Wow, if Weldon has a direct, bolt in, no paperwork, legal replacement for the Dukes electric fuel pump in our older Mooneys that is really good news. As I recall the advantage of the Weldon is that it is designed for continuous usage whereas the Dukes is just designed for intermitant usage. Sometimes I just forget to turn off the fuel pump. As I understand, with the Dukes pump I risk an $800 replacement. With the Weldon, not so much. Can someone confirm my thinking and the facts about the new Weldon. Quote
N601RX Posted December 2, 2014 Report Posted December 2, 2014 If I remember correctly Rob put one in his E model and started a thread on it. Quote
DrBill Posted December 4, 2014 Report Posted December 4, 2014 Wow, if Weldon has a direct, bolt in, no paperwork, legal replacement for the Dukes electric fuel pump in our older Mooneys that is really good news. As I recall the advantage of the Weldon is that it is designed for continuous usage whereas the Dukes is just designed for intermitant usage. Sometimes I just forget to turn off the fuel pump. As I understand, with the Dukes pump I risk an $800 replacement. With the Weldon, not so much. Can someone confirm my thinking and the facts about the new Weldon. TRUE.. I had a Weldon installed this annual. Continuous duty too. Sounds entirely different ! Have to get use to that ! A&P said it was a bit tricky with the bracket but got it done. BILL Quote
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