hammdo Posted March 6, 2023 Author Report Share Posted March 6, 2023 The o-ring is MS29512-6 and the washer AN6291-6. Washer is ok so I'm just going to replace the o-rings... On order from Spruce... -Don 1 Quote Link to comment Share on other sites More sharing options...
hammdo Posted March 6, 2023 Author Report Share Posted March 6, 2023 Talked to Teresa @ Aero Motors so pump is on it way! Seems like the best course of action vs getting one for about 2 to 3 times the overhaul price. She'll be down a week but well worth it knowing this will be taken care of. BTW, the mechanical pump, while not leaking yet, will be watched more closely -- I'll be checking it out as time goes. Its about 18 years old from what I can tell in the logs... -Don Quote Link to comment Share on other sites More sharing options...
hammdo Posted March 15, 2023 Author Report Share Posted March 15, 2023 Still waiting on the pump. I’m sure they are inundated with work. Hope she’s ready for the weekend… -Don Quote Link to comment Share on other sites More sharing options...
hammdo Posted March 17, 2023 Author Report Share Posted March 17, 2023 Pump is on its way back! All things considered, pretty quick turn around. Should have it early next week. -Don 2 Quote Link to comment Share on other sites More sharing options...
hammdo Posted March 21, 2023 Author Report Share Posted March 21, 2023 Pump arrived! Had several items replaced (including the pump motor). Looks great and can't wait to install it. I've attached a video after I removed the pump - removal is VERY easy. The new pump needs new connectors - thankfully I ordered Knife Connectors ahead of time ;o) -Don 1 Quote Link to comment Share on other sites More sharing options...
Hank Posted March 22, 2023 Report Share Posted March 22, 2023 Good deal, Don! I'm curious to compare pump sounds. Quote Link to comment Share on other sites More sharing options...
hammdo Posted March 22, 2023 Author Report Share Posted March 22, 2023 Me too! The work order detailed everything replaced so seeing the pump motor replacement, I expect it to be much quieter… -Don Quote Link to comment Share on other sites More sharing options...
Guest Posted March 22, 2023 Report Share Posted March 22, 2023 When you get it installed, leave the out let side fittings loose, open the fuel selector valve until fuel starts leaking from the loose fitting, then tighten it. This way when you turn on the pump it’s already full of fuel and won’t run dry. Quote Link to comment Share on other sites More sharing options...
hammdo Posted March 22, 2023 Author Report Share Posted March 22, 2023 Great idea! I was looking for a way to pre-prime it… -Don Quote Link to comment Share on other sites More sharing options...
hammdo Posted March 26, 2023 Author Report Share Posted March 26, 2023 Pump is installed! I have video of the run (the overhauled pump is quieter - but still pretty loud). Install was a breeze. Here are pics and the new connectors (knife connector for the power side) installed. The pump motor was a little bit shorter (not by much) and what I did was leave the straps on the motor loose so the pump could settle as needed in order to align the fuel hard lines with no 'stress' on the connections. -Don Quote Link to comment Share on other sites More sharing options...
hammdo Posted March 26, 2023 Author Report Share Posted March 26, 2023 Videos -- after install and then the run (Yes I know the pump is loud but not nearly as loud as the failed pump): After Install: The test run (loud is relative ;o): Flight test went well, new normal for pressures - was 6.5 to 8 psi now 5-6 psi. Need more flights to get verification. -Don Quote Link to comment Share on other sites More sharing options...
hammdo Posted March 26, 2023 Author Report Share Posted March 26, 2023 Here is the work order for the overhaul: Quote Link to comment Share on other sites More sharing options...
Fly Boomer Posted March 26, 2023 Report Share Posted March 26, 2023 13 hours ago, hammdo said: Here is the work order for the overhaul: Nice documentation! This topic will help someone else in future. Quote Link to comment Share on other sites More sharing options...
hammdo Posted March 26, 2023 Author Report Share Posted March 26, 2023 I hope so. Was not a bad job to do… Edit: Just some details before the overhaul: Jan 1988 the Weldon Fuel pump replaced the Dukes @ Tack Time 682.56 In May of 1991 the Weldon was Overhauled @ 1193.20 Tach Time Now in March of 2023 the Weldon was Overhauled @ 4067.30 Tach Time So 32 years and 2874.1 hours between overhauls -- I still wonder why after 3 years it was overhauled the first time. My Guess it was a 500 hour overhaul -- like the Mags. -Don Quote Link to comment Share on other sites More sharing options...
Jim Peace Posted June 5, 2023 Report Share Posted June 5, 2023 I put in a CJ aviation pump about 9 years ago in my C....800 hours and runs perfect: https://www.mcssl.com/store/cjaviation/dukes-4140-pumps Quote Link to comment Share on other sites More sharing options...
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