Oil Pump: Replace or Overhaul? 

yep, aviation is a unique business! Long ago, I was part of an engineering team that designed a piece of avionics for the C-17. I'd guess about 10 man-years of effort for the design. Qualification testing was added on, and then there's the separate issue of manufacturing it. I think the total production was about 400 units. That's not many pieces to share all of that expense! While that design has been replaced with updated versions, I'm still quite pleased to have played a small part in an aircraft that has been so useful.

First of all, you are not "old" by any stretch if the imagination. Second, I (and im sure MANY others very deeply appreciative the time you have spent sharing sll that you have with us.

With a connection to the material handler at a local defense contractor, getting 'scrap value' mechanical parts is exceptionally rare. I've tried for years. Problem being that most of these components are tied to a military contract, which automatically go to a scrap recycling facility in sealed containers. They also have commercial craft parts, but as Jay stated, they will rebuild them to the end of time until they no long meet flight status or the parts become unavailable, at which point, into the scrap bin. The better outlets I've dealt with operate overhaul programs (3rd party) at or around airfields, airports, and once in a great while, an air museum will part with something they can't get or make parts for anymore. There's a few places that will sell to the public via aircraft salvage, usually very cheap at material cost plus shipping, but it's a given that the part you're getting will need Serious repairs for even ground use and may just be a desk trinket in the end.

14:06 once you remove the the two screws you give the shaft a little soft tap and they usually separate very easily. Haven’t found an easy way to get the oil shafts out yet. Loctite 290 is the enemy sometimes. Pump list price is 36k new if you could ever get a new one lmao

That oil pump is really a nice machine!

Hey, dude!! Glad to see you still enjoying your craft and sharing your knowledge and experience! 😃 Came here on my husband's birthday to thank you, again, for that one time 9 years ago! 😊 I still think about you and that video every year on his birthday. You're such an awesome dude, and I hope you continue to succeed in everything that you put your mind and hands to. ❤

Great video, thanks

Very interesting, I've never seen a pump like that. It looks like it's doing with 4 gears what would normally be done with 6 gears in three separate pumps. Each inlet feeds 2 outlets and vice a versa so the layout is really only useful for scavenging since the outlets are all combined anyway. Thanks!

Good work, JZed ...as usual

Always interesting content Sir. Thank You for the efforts to share it. Best Wishes to You and Your Family.

Sad that we don’t get weekly content anymore. Still excited to get what we get though.

Just did a quick search...I found one that's being sold as-is but with a "repairable" tag (from 24 years ago lol) on it and it's still 9 grand.

Often automotive pumps last a really long time and don’t really need changed. But, they’re so cheap it isn’t worth the cost of inspection and testing. Low pressure oil pumps in general last pretty well. They’re not really under a large stress and are pumping lubricant.

The recycle value on a RR 250 is worth at least $2500 in alloy to the right metals buyers.

HI Jay, Lovely video. I have the privilege of working in the "oil team" of a big name aerospace company. Your videos are always a treat when trying to understand components outside of just looking at 1D system diagrams. When in this video you talk about the "happy cycle" of the oil, you've skipped a component that I would love you to make a separate video on, the breather or sometimes called air oil separator. I know that different engines have different architectures but I would love if you could share your own expirience with this component! how does it work and look like? is it always necessary? is it always standalone or can it be imbedded into the oil tank? Thanks!

❤️‍🔥

Is there anything you do replace with non-oem parts? Say generic hardware, screws, bolts, washers, maybe gaskets and o-rings? I assume with industrial engines that willl forever sit bolted to the ground you have some wiggle room

Heh... For the longest time my older brother would fight you if you said they made high pressure oil filters. Little did he know I used to work with them. But I made turbines for Tolls Royce, and he only found that out decades after the fact.

I never figured out if JayZ is just an employee of S&S Turbines or if he just owns the place. He's also on none of the pictures or employee list on the S&S homepage. I sometimes imagine he's a super gas generator fan and sneaks in after office hours to do RU-vid videos. ;)

H Rickover would ask vendors of their parts were tested using the mil drop test. If they said yes he would open his upper floor window and throw the expensive part out

How many engines do you test a year?

Thank You Agent Jay Z

I get all that but in aviation things often get OTT i bought for pennies an aviation engine in perfect condition that was being scrapped because it was its birthday

Thank you very much...I always enjoy your videos and analysis...I want to communicate with you by any means of communication, which is very necessary and I wish you more success✌️🤞

Sir please reply me , i need help and suggest book for jet engine detailed information

That jet boat is still sitting around?

Agent Jay Z , where do I go to ask you a question on jet engines but not about this particular topic (oil pumps)

Found a repairable m250 p/n 23008458 for $1650 but open for offers. On the web.

Hey Jay, is there a reason/story behind the bulgarian flag behind you?

I'm 55 and semi-uninspired,. Too old to do anything new but too young to retire. Shitty zone of age when you(me) want to do something different but cannot without silly free $$$ to do so. Late working age is such a PITA.

😂😂😂😂😂😂 YOUR NOT OLD WHAT YOU TALKING ABOUT.

It's nothing special (the actual pump) but as stated, anything aviation is priced to prevent someone from doing stupid things to things that fly. Thank you for the explanation. I am still against regular people buying automotive parts, never mind aviation.

CC is not available with this feed, so it is very difficult to follow (as usual) for the hard of hearing jet mechs...as usual...please do better. Never mind, the feed is unaware so will unsubscribe....