How Does a Hydraulic Cylinder Work?
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- เผยแพร่เมื่อ 5 ก.ค. 2024
- Hydraulic cylinders are a critical component of farm equipment. They do lifting, tilting, swinging, splitting, digging, and a host of other tasks. If you own a tractor with a loader there are four that you can see easily on the outside of the tractor, two that lift the main boom of the loader and two that cause the bucket to tilt or curl. Many people use cylinders all the time and have no idea how they work. This video will show you.
Basically, a cylinder is what it sounds like, a long tube, with a ram, and inside that tube is a plunger and a lot of seals and wipers. You have a hydraulic pump on the tractor that makes oil flow, then the joystick, or loader control directs it to one end or the other of the cylinder. If the oil flows one way, the ram extends, if it flows the other way it returns, enabling you to use your loader, split logs, raise a brush hog, lift a round baler tailgate or dig holes with a backhoe. In fact, if you really look at a backhoe attachment, you may be surprised at how many hydraulic cylinders are on the machine.
My tractor has had a leaking cylinder ever since I bought it nearly five years ago. The leak was internal, no oil came out of the system, but if you left the loader and bucket up in the air, the bucket would gradually let gravity dump it, which could create a dangerous situation. The previous owner had purchased a seal kit to repair the problem but had never installed it. My tractor was due for some other maintenance items, the dealership had a Winter Service Special which offered me a discount for bringing it in when they were slow, so I broke down and had it repaired. I'd like to thank S & H Farm Supply at Rogersville, Missouri, the dealership I used to manage, for letting me film this activity in their shop. Their top technician, Hoot, disassembled the cylinder and let us look inside. In the next video I'll show you how he fixed it. There are tons of pieces and parts that have to be assembled, in the exact order, and with special tools, to get it repaired right. For 99% of my audience, myself included, I can tell you, DON'T TRY THIS AT HOME!!!
After watching Hoot install the seal kit I was extremely glad I had employed them to do this process, versus me trying it. There's a lot going on in there, and what we don't show in the video, is the massive amount of oil that spills when you break open a cylinder. Jobs like this one are why you need to have a good relationship with a dealer. Here's a link to the next video where the repair actually gets made: • How to Repair a Hydrau... .
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Thanks for the demonstration. This helped out a lot with a school engineering project!
This was an awesome explanation of these hydraulic cylinders. Many thanks to your friend Hoot. My neighbor (well experienced) was in a shop working on some sort of hydraulic cylinder and got seriously injured when a shot of grease came out of it (at least he said grease, I assumed it was oil, but not sure, it was on a dozer I believe). He still gets very sick from time to time because apparently all that grease/oil cannot leave your body. His arm has major scares from it. Some things are better left to those with the right tools and experience, and high pressure hydraulic's seem to be one of them.
Thanks, Mike for the video. I've had lots of cylinders apart, but it's always enjoyable to watch and not get my hands dirty! LOL
Yeah, I purposely left out the part where the angry cylinder pukes out 40 gallons of hydraulic oil on the pristine floor! Everyone needs to experience that for themselves. :)
That is one problem I have not had on my tractor, but dealt with while in the Air Force, and worked on equipment we used for loading and unloading cargo. We had problems with the older equipment primarily and had to deal with hydraulics on the trailers and forklifts we used. I was fortunate not to have any injuries of see anyone else injured while working with that equipment.
Thanks Mike! Safety-keep teaching it!
Thanks to Facebook I found this. This was something I always wanted to know.
awesome video Mike thanks for sharing this
Thank you for the demonstration.
1 question.
I have 1 single cylinder, when it goes up or extends it makes a squeecking noise it still goes up but noisy & the actual piston it has small spots of rust then half way it looks nice & shiny.
What could it be this problem? Will it b low in oil?
Can anyone tell me what is the problem.
Thank you
Thanks Tractor Mike - very helpful!
You bet! Thanks for watching.
Thanks, Mike! Wish I had seen this last year when I had a problem with my back hoe. Did not know you could unscrew the rod and leave the barrel on the tractor. Good video, thanks!
Yeah, I wouldn't have thought to do that either, but it's SO much easier. That's why I like hanging out with Hoot, the guy in the video, you almost always learn something.
Thanks once again for a great video, thanks to you as well Hoot
Well done, Mike. It's like a video field trip!! :)
But usually after a field trip they take you out for ice cream and I'm sure there's an app for that but I'll never figure it out :).
Great video, Thanks. Your friend looks so sad. Please give him a raise.
so that was a simple fix just tighten the nut down. thanks for sharing.
We went ahead and put a seal kit in since the previous owner of the tractor had purchased it and it was available and free. Stay tuned for next week's segment where you get to see what that process involves.
What would cause low power to the lift and tilt of a bucket?
Would be interesting to understand the physics behind this. How does a small amount of pressurized oil lift all that weight? Fascinating!
So you got by lucky only needing to tighten the nut back up? Interesting video. Thank you.
I already had a seal kit that came with the tractor so we put it in. You'll see that later this week.
I just bought a 1966 Trojan tractor model.114 wheel loader.
Can I run AWL 46 hydraulic oil.. Does it have friction modifyeds, or do I NEED to run more expensive New Holland Hydraulic oil..
This model 114 also has an Added 21 ft reach back hoe on it...
I already own a big Dresser 175c track loader.. I already have 30 gallons of Awl 46 hydraulic fluid in the shop..
Thank you... Martin..
I have a new holland 37. With no owners manual need to now what dash lights and warnings lights are
Good segment, how about one showing how to bleed air out of the hydraulic cylinders?
On many tractors they bleed out themselves. After I was done filming, Hoot cycled the bucket back and forth a time or two and the air was gone.
Tractor Mike, my grandpa always used WD-40 on the rams to keep them from rusting and moving smoothly. What are your thoughts on that?
Never argue with grandpa, sounds like a great plan to me!
I love Hoot...my Dad's name BTW
I get rebuild kits and always hve parts left over
I have parts left over even when I don't use a kit :-)
just watched this to understand my statics hw
How did you figure out which cylinder was the bad one?
Here's Hoot's reply: Disconnect both hoses from the cylinder and blow air in one end and if it would have come out the other hose, the seal on the piston is bad. When the piston is loose, that won't work and you have to disassemble the cylinder to find the problem.
Having said that, I'm pretty sure he had figured out which cylinder was bad when he took it apart. Could be he's clairvoyant. He could be a "tractor whisperer". :) He's one of those guys that seems to figure out what the problem is easier than most of us.
hoots seen some shit
Did You make it with woodprix instructions?