Hey hope you're all well. If you don't mind my saying so, a few thoughts on zincs; The tapered pipe thread on the zinc-holder "plug" is a dry seal thread so it doesn't really need any teflon tape or rectumseal. If you screw the plug into a casting, the zinc will work a lot better if there's "electrical conductivity" between the male and female thread. Same where the pencil zinc itself is screwed into the plug. If somebody loctited it into the plug, that would insulate the zinc from being able to work. It's easy to test the zinc-to-plug conductivity before installation or the zinc plug-to-casting conductivity after it's installed with a simple vom check for resistance. Zincs that don't seem to wear out might just be installed so that they're insulated from being able to conduct. Sometimes pencil zincs come in stock lengths that are too long for the amount of available space inside the casting. It's a good idea to check the depth of the hole with a screwdriver or extension before screwing a zinc in that may be too long. You don't want the pencil zinc annode touching anything in there. Cut it shorter if it does. Take a moment to look in there and pull out any broken off zinc chunks that are hanging out. And, I didn't mean to sound vague when I said I better not get caught with teflon tape; I was referring to the Chief on a certain T Boat who would rip me a new whatever if I was caught using Teflon tape on his boat. So we always used the paste instead. I still do 40 years on. NONE of what I say is guaranteed correct btw, just my 2 cents. Thanks. Stay Healthy up there!
Marty Spargur Thank you for the info! I’ll definitely be looking into that vom check. Our captain really wanted us using Teflon, he was the engineer on this boat before he got his ticket and I guess he had some issues with them that he didn’t want to talk about 😂 But I see your point about them not conducting properly, that could be the reason that one zinc came out at 95% and the other 20%. Although I don’t know because this was my first time changing the zincs since I’ve been back and the zinc logs weren’t quite filled out correctly. Edit: typos
@@EthanLandshark I'm glad I was referred here by watching train videos , this is amazing and now I'm a subscriber thank you , when you were looking in the chest of tools and said things get moved around , my thought went straight to where the fuck is my 10 mm socket and wrench lol
Seems every type of Large Vessel I have been on has at lest one "Knee Knocker" I see you didn't miss out on the experience...LOL - As for the Teflon tape on those NPT fittings as another commenter said... We did that too on some... But also had a "Grounding Clamp and Wire" on the top...so maybe if you have a worn/oblong fitting where Teflon is necessary that might be a "Fix"
Yes the other commenter made a good point. Its funny, that was one of those things I did just because thats how I was taught. I was told its because they are really difficult to get out otherwise. Im no longer on the boat otherwise I would do some experimenting
If you hold the PTFE roll so that the the loose end of the tape hangs from the top on the side facing you if you have it on your right index finger, when you wrap it on the thread, it stays tight and doesn't unravel from the roll of you know what I mean. It's better to rely on the brass taper to seal with anodes though as you want good conductivity. Great video though, I'm so jealous as I work in an engineering office now.
gillon stewart Jeremy showed me that trick after the video, I said I bet someone will comment that! You win haha! As for the anodes, yes, the old captain wanted them teffloned. He used to be the engineer on this boat before he got his ticket. I guess he had some issues with getting them out!
It was! I ended up continuing down the paramedic route! I’m currently doing my practicum. I’m editing a new video tomorrow of an oil change on Newzie that should be up this week!
@@EthanLandshark great video, thanks! Two questions: how often do you need to change zincs and (since you pointed it out at the end) what did it smell like?
Andreas Sagichnicht haha great questions! Generally we check zincs once a month, some pumps go through their zincs faster than others so we have to check them more frequently, I.e. pumps with one zinc, pumps that run for longer periods of time or just odd electrolysis in the pump! It smelled like low tide!
youtube hates me and wont let me watch this. :( I can't wait to watch it tomorrow when all the neighborhood kids are sleeping and not hogging up the internet.
Finally got good enough internet today. I learned stuff... Stuff that I'll probably never use... But it's there in my brainhole. Thanks for showing us. This is way more interesting then changing the oil in my lawnmower.
I used to do marine service work for small to medium sized yachts. Half the time you'd go to pull a pencil zinc out and there wouldn't be anything left. Yikes. Take care of your shit people.
We have a zinc report sheet just for that reason! It gives you an idea of what pumps eat up zincs the fastest so you know to check those ones more often.
