Welcome to the ZK MasterTech! See what it's like to dive into the world of a Master John Deere Ag Technician, Zeth Key. A 2007 Automotive Graduate of Wyotech in Laramie, WY and 2023 WyoTech Hall of Fame Inductee now finds himself working on John Deere diesel tractors and combines in the farm lands of central Illinois.
Working for Sloan Implement in Atwood, IL for over a decade, Zeth has seen just about every failure your John Deere equipment can have. Subscribe to ZK MasterTech to see what it's like to repair some of the most advanced farm machinery you can buy!
Being a John Deere technician is one of the most rewarding and challenging careers you can get into. Just like the whole industry, companies in AG have a hard time finding talented, experienced people. Hopefully this channel will show the world the technical side of agriculture and what it takes to keep the farmers going and to inspire a younger generation to pick up a wrench a start a great career with Sloan Implement!
ZK MasterTech
New video going live today at 3:00 PM.
Last harvest season this S780 came to a stop in the field with low transmission pressure. Field diagnostics led us to the 5 speed feeder house gear case… and once it came apart, the damage told the whole story.
Big teardown, major failure, and a full repair from start to finish. If you like seeing what actually fails inside these machines, you’ll want to see this one.
See you in the comments at 3.
— ZK
1 week ago | [YT] | 363
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ZK MasterTech
I’ll be at the National Farm Machinery Show in Louisville, Kentucky Saturday, February 14th!
If you’re coming to the show, stop by and say hi — I’ll be hanging out with the Sloan Express crew at Booth #8943. Always good putting faces to names and meeting the people who watch the videos and keep this industry moving.
We’ll talk diagnostics, repairs, equipment, content, or whatever green iron problems you’re fighting this season. I’ll have some merch with me too while supplies last.
Looking forward to meeting you guys in person. See you Saturday 👊
#ZKMasterTech #NationalFarmMachineryShow #FarmMachineryShow #LouisvilleKY #JohnDeere #AgMechanic #DieselTech #FarmLife #AgTech #SloanExpress #KeepThatGreenIronMoving
1 week ago | [YT] | 239
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ZK MasterTech
It’s finally time.
The last chapter of the John Deere 9520 engine saga goes live today.
After everything this tractor went through, it all comes down to one moment and one turn of the key.
If you’ve followed this series from the start, thank you — this one’s for you.
If you’re just finding it now, buckle up… nothing about this was guaranteed.
Video drops at 3:00 PM.
See you in the comments.
Which video did you like the best so far in the 9520 engine series?
— ZK
2 weeks ago | [YT] | 139
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ZK MasterTech
NEW TIKTOK ACCOUNT!
www.tiktok.com/@thezkmastech?is_from_webapp=1&send…
Just an FYI I had to get a new TikTok account because the overlords and bots from China decided to accidentally permanently ban my entire TikTok account when I was filing copyright infringement reports against fake accounts. So, I appealed to no success, they didn't even respond. I made a new account and I will be posting content to that account. Please give this account some followers!
www.tiktok.com/@thezkmastech?is_from_webapp=1&send…
3 weeks ago | [YT] | 71
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ZK MasterTech
REMINDER!
New video drops today at 2:30 pm!
In case you missed the previous videos to catch the whole story in depth, I put all the videos on the 9520 engine in a playlist here- www.youtube.com/playlist?list...
3 weeks ago | [YT] | 59
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ZK MasterTech
🚨 New video drops TODAY at 2:30 PM 🚨
This one’s a big one.
I take you through the complete 12.5L long-block build on a John Deere 9520, start to finish. What began as a catastrophic engine failure caused by coolant intrusion from a failed water pump turned into a full complete block assembly build on the stand — and I show everything.
Injectors, valvetrain setup, timing, seals, turbo, fuel system, oil system, and final prep before install. No shortcuts, no guessing, just real-world shop work done the right way.
If you like long, in-depth builds and want a true look at how big iron gets saved, make sure you’re here for this one.
⏰ 2:30 PM today
3 weeks ago | [YT] | 446
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ZK MasterTech
It’s live. https://youtu.be/G7ZiUcPlYa0Brand-new John Deere X9 1100, Ultimate Technology Package, every option I’ve ever seen — and a full front-to-back inspection. This might be the most X9 information you can fit into a single video. There’s also an announcement at the end you won’t want to miss.
1 month ago | [YT] | 265
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ZK MasterTech
Back to work… and I’m coming in HOT. 😤🔧
The new video is LIVE and it’s loaded: https://youtu.be/NSCi0n3FCCg
✅ X9 shop repairs — clean grain elevator overhaul + cleaning fan belt & sheave maintenance
✅ Quick look at a $1M X9 1100
✅ Surprise ending back at the shop: a new engine shows up for the 9520 👀
Go watch it and tell me — what part had you like “NO WAY”? 🤘
1 month ago | [YT] | 401
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ZK MasterTech
I told you guys I’d be off work this week… but I also said I’d try to put something together for you.
Well, I went back through years of footage and pulled off what might be one of the best videos I’ve ever made.
Tomorrow at 10:00 AM, I’m dropping a full hour of nonstop equipment carnage — catastrophic failures, machines taken straight out of service, and some of the worst damage I’ve ever seen, both in the field and in the shop.
No filler. No fluff. Just constant “how did this even happen?” moments from start to finish.
If you like real-world failures, high-stakes diagnostics, and seeing what equipment looks like after everything goes wrong… this one’s for you.
Set a reminder.
This one’s going to be wild. 👀🛠️
1 month ago | [YT] | 521
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ZK MasterTech
Hope everyone had a great Christmas 🎄
New video drops Monday at 3 PM.
I got the 9520 in the shop!
Worst engine bearing failure I’ve ever seen — this one deserves your full attention.
1 month ago | [YT] | 301
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