Hydraulic Cylinders Are Awesome! But Are These Fixable?
ฝัง
- เผยแพร่เมื่อ 14 ต.ค. 2021
- A hydraulic cylinder on my tractor backhoe blew out, and the dealer said to just buy a new one. No way. I'll fix that thing for $25 instead. While I'm at it, I patch another cylinder with a scratched rod in a way that you just aren't supposed to: welding it. With some care and patience, I think it came out really well. Will it last?
I also explain how hydraulics work, the physics behind them, and have a discussion on just how friggin awesome hydraulics really are!
***UPDATE: The dealer really did a disservice telling me to buy a new cylinder. It turns out that the backhoe on this machine is AMERICAN MADE, by a company called Bradco in Texas. If you contact Bradco, they do indeed sell seal kits for these cylinders. I don't think Mahindra is at fault for this, but rather the dealer who should have just said: "Hey, that backhoe is made by Bradco. Call them." I think the person I spoke with couldn't find info on the backhoe and so just gave me the easy answer: "Buy a new one."
MERCH STORE!:
www.farmcraft101.com
Patreon:
/ farmcraft101
My Amazon Affiliate Storefront:
www.amazon.com/shop/farmcraft101
Buy me a coffee:
www.buymeacoffee.com/farmcraf...
Etsy Store:
www.etsy.com/shop/MadeByFarmC...
Facebook:
/ farmcraft101 - แนวปฏิบัติและการใช้ชีวิต
![BOWKYLION - ส่วนต่าง (do it without me) [Official MV]](http://i.ytimg.com/vi/7x-pwcMopzE/mqdefault.jpg)
Im a hard chrome electro plater, only job ive had since leaving school 49 years ago. I get to plate new and also repair and refurb a lot of old shafts. Very few of the refurb shafts i get in are straight and true, especially so of excavation plant. They are often bent in several planes and need straightening before having al the old chrome ground off and replaced with new. I have seen alsorts of adhoc repairs done to shafts over the years just to keep them going, from soldering, brazing, mig or arc welding and modern epoxy, but the cheapest and simplest i think i have ever seen was a guy who filled the pitting and small damage in his rod with nail varnish. It apparently it held up good and healthy for many years, and he only bothered to get it rechromed when the seals finally failed.
David in the U.K.
Hydraulics is interesting, if the O-ring seal is not working, it could be adhoc fixed with some bubble gum.
th-cam.com/video/D1RYVSmuOmc/w-d-xo.html
I assume you mean fingernail varnish for the lady's?
@@TBU2012 Yes, good old ladies finger nail stuff. Bright red if i remember right. Did the job okay, we only got to refurb the shaft when the seals finally blew out.
Oh I'm try'n that. Thanks in advance.
Maximum respect Sir, hard chrome is a real skill infused with a dash of science!
For seal ID use the 'james walker' catalogue, it has sections where seal types are identified by cross section geometry, then table where you can match the other dimensions to either the seal or the housing. Also describes how to design the grooves for machining the correct grooves for a given fit for piston or face seals etc. It's the seal bible, and easy to follow.
Thank you for that. Had never heard of it. Just found online and downloaded.
I agree and I use it all the time
Well done! Clear speech, good lighting, sharp focus, and no stupid sound track. GREAT JOB.
And strong seals!
I've heard of useless things being described as "useful as a bike to a goldfish" YET seals have cycles and that's a good thing?.
I know this is a older video but watched it first time today and as you was draining the cylinder and most the fluid was going on the ground and then the bucket dumped over i laughed so damn hard because it was almost an identical replay of last time I did this! Thank you for brightening my day!
When I drove forklifts for a living, the guy who serviced them would roll up in a transit van that served as a mobile workshop. In the back of the van one side of it was just drawers and drawers of o-rings, seals and all manor of bits and bobs. Without fail the guy would always be able to find the right part first time for whatever he worked on. It was impressive!
Great but this is a SMALL percentage of the fix
I was one of those guys..
@@mrfixitdellacertifiedfield5376 Its amazing how many times in life its the "small" things that bring things to a screeching halt. That cylinder won't function without the right O-ring. Period. Doesn't matter if it takes you 5 minutes or 35 minutes to disassemble that cylinder if you need to spend 45 minutes or more looking for the oring, checking ones that look close, searching again and repeat until found.
@@nate2838 aren't you guys making things harder than they need to be for job security?
Why can't you have a taxonomy like any proper engineering field.
Part numbers are a thing.
As someone said before. Finding the o-ring is only a small part of the job, so why make it hard. I don't get it.
The fact that you can laugh at yourself tells me all I need to know about your character. 👏
that he has some and isnt a jack a$$.
I figure if I can't laugh at myself, then there will just be a bunch of people laughing at me! ;-)
Not laughing AT you, but WITH you!.
I''m just glad I've never done anything so stupid. Amirite guys! ....guys? FINE I'm stupid too. Happy!?
I’ll never outgrow doing somewhat less than brilliant things with oil, it always rewards me and cuts down on boredom. 🤣
Looks like that’ll do. I’ve always stuck with brass or silicon bronze for rod repair. A torch does the trick, but TIG is a lot less work. I like the soft metals since they are easier to file/sand down and it won’t rust. Since I don’t yet have a metal lathe, the final finishing is a lot more work and anything that requires fewer file strokes is the way to go. I’ve always steered away from MIG because of spatter and potential for undercut. Of course when you have one of those magical horizontally spinning metal remover machines, having to go back and fill some undercut isn’t nearly as big of a deal.
I prefer the green and yellow variety of machinery, but am certainly jealous of the lesser breeds when it is time to purchase hydraulic seals. That seal kit from JD would be $100 minimum and that’s IF they even have it. I’ve finally found a local parts supplier that has an ample supply of seals for pennies on the dollar, but it took me years to find them. The first shop I was using is in the business of repairing cylinders at $85/hr and didn’t seem to care for me disturbing them to buy a $5 seal... Many times it would require 2 trips to their shop because they wouldn’t take the time to carefully measure the gland and would end up selling me the wrong size o-rings and seals. Not to mention their prices seemed to reflect the mood of whoever I talked to. One of the guys would give them to me for nothing and I would toss him $10-$20 in appreciation. The other guy might charge me $15 for a gland kit if he was in a good mood or $40 for the same parts if I was “disturbing” him. That just rubbed me the wrong way, so I just found a shop that is happy to sell parts at a reasonable price.
You are an amazing director, script writer and editor. And sense of humor. I was in tears watching it.
As someone who does exactly this for a living, the gland and rod jokes never stop.
Lip seals on shafts...
The glanis is the head of your shaft
Never crossed my mind.
So... you're saying you like to get piston? Is that pretty much the thrust?
wait until us hydraulic valve guys get going. we're permanently regressed to 13 years old. Balls, ball retainers, ball stroke, shaft stroke, pin stroke. ball seat penetration...
You should lubricate all the seals with hydraulic fluid before assembly. 1) Makes assembly easier, 2) Pre-lubes the seals so they aren't damaged at start up.
Wrong
You have to use grease when the seals are in the gland it goes on the rod smoother and less likely to cut the seals
@@joehowes4645 wrong, you can use the hydraulic oil to lube the seals and rings, however you normally use petroleum jelly because it's a neutral lube and will not contaminate the hydraulic oil. Do not just use any grease laying around, that will contaminate the reservoir.
@@trashpanda2994 i literally do hydraulics u melon stay in your lane you use grease from a cartridge and no u dont use petroleum jelly u utter muppet honestly stay quiet f
@@trashpanda2994 ik more then you and this guy you just google search get the facts right before chatting shit
Thank you for documenting this repair. I have often wondered how difficult it would be to repair the hydraulic cylinder. While I'm very mechanically adept, I've never taken one apart. I found your video very interesting and informative and very much appreciate your efforts.
Nicely done video. I have worked on equipment of all types, trucks, cars, tractors, you name it, most of my life, and I can honestly say I'm still learning things. I love backyard mechanics, work with what you have, and make it work. Great job! BTW, the hydraulics power explanation was awesome, thanks for that. I never really put those numbers together until you did that, now it all makes sense. Subbed.
For someone who is not in the hydraulics business you have a very good understanding of how it works and I was impressed by your repairs. So many people totally screw things up and then call in the professional to fix their screw up. After resealing thousand of cylinders in my life I will say that I have forgotten to install the gland nut more times than I'm willing to admit. 😆
Oops.
yes to some degree this guy still is NOT ADRESSING THE ROD FINISH which he entirely guessed at
I love the torque wrench "CLICK" when putting that main nut on lol
As I was following your excellent step by step I was thinking of the arm cylinder that leaked on my excavator. I had to send it to my shop that supplies me with machine equipment since I don’t have a workshop set up. It was expensive. Your expertise saves you money. And your machinist equipment helps. Very clear presentation, thanks
Congrats on 2 fine repairs! I bet it's super rewarding to do that and then see that it worked so well!
Age is a bigger factor with seal failure than cycles.
I bought a 1988 case 580D with 42 hrs. on it, that sat in storage forever. Started popping seals all over when I put it to use. The materials in the seals harden over time.
Yep , not every seal but 90% of them in my exp were hard and brittle, also 50% of the time only leaking because the seal backer (thin white one that only pushes ) has smeared into a line across the pressure seal causing an opening.
Maybe your friction is too high on this rod /seal ( friction testing is done in a lab ) you maybe wiping the rod/ seal way too much causing high friction which can pop the seal or burn up the seal
Any way to tell in place on machine in field? Have a sneaking suspicion that CATERPILLAR never used blue for the visible wiper. They were “repacked” and 50 hours in slobbering out a gallon in 2 hours light boom use grading 1B loose stone. Can’t tell if they wore themselves out or are oversized. The cap loosens itself on the one boon cylinder as well. Cannot get it tight enough for it not to be hand loose within 15 minutes.
@@youngmike8645 all my Cat glands use the wire ring and pin to lock it in. I'm about to repack the boom cylinder on my 307. I found it interesting that kit prices ranged from under $70 to over $300. wtf? I went with the $75 tax and shipping included kit from a reputable co. Should the dust seal be blue? Haven't looked yet. Btw the only seal on this 90's machine that leaked is the boom cylinder and it is very obvious that it was the crap that builds up on the shaft because that section only gets wiped if you go below grade like digging a pond. I had to scrape that crud off using a razor blade. That's what destroy the seals. Kept clean it should last another 20 years I'd bet.
The fact that you were able to repair something under 100$ while giving it to someone for repairs or replacing it would cost possibly over a thousand dollars is quite commendable.
I learn a lot from this channel, I may not use this knowledge in the future but it is good to have.
Hats off to you.
The day you cant buy a replacement part its good to know not all is lost.
Let's say you've got a tractor like an old Ford that hasn't been made in 50 years and few had backhoes on them finding parts for it are impossible.
Everything almost can be fixed its the cost.
Thing is he DID NOT finish the repair " Guaranteed the rod will leak again !!
Just got onto your channel and watched a few. I think you are doing an amazing job. Loved how you overcome the repairs to your cylinders. You got a new subscriber. 👍🇬🇧🔧
You can fill scratches in a rod with a low melting point silver solder that usually has a pretty good PSI tensile strength and is easy to sand with some screen back abrasive material. Lawson Products sells the solder called 92C (get the acid core version not the resin core version) and the screen back. The material that you were using as an abrasive earlier in this video is Screen Back, not Emory cloth. You can sand using both sides of the sheet or roll with screen back. Emory cloth only has abrasive material on one side.
All I can say is very entertaining, very educational and very humorous. This channel is so relaxing to watch. Thank you so much. Hope you're doing well. Take care.
I was a marine mechanic for forty years and rebuilt a number of hydraulic cylinders. I complement you on your repair on the gouged rod. Love your channel.
I used to hate centring up in a four jaw independent chuck when I started an apprenticeship as a toolmaker. Three jaw self centring chucks were just so much easier and quicker to use. But if you want something perfectly aligned, a four jaw independent is the only chuck to use. Love your videos and your resourcefulness. I’m never going to tackle the things that you’re doing but really enjoy watching you solve problems. Along with ‘Watch Wes Work’ and ‘Diesel Creek’ your channel is in my top three TH-cam channels. Thank you
Really nice job! I love seeing the use of practical repairs when the situation allows. Great tutorial!
Man I'm impressed how well this turned out, I had doubts at first, but you should go in business. Fantastic results, my compliments.
I always wondered how four jaw chucks worked, but now I see why they seem to be the preferred chuck. Very versatile and pretty straight forward. Thanks!
The genuineness of your video, 👌🏼love it.
Misktakes and all included. In my opinion this is a better instruction video than a “laboratory version” where all is going smoothly. Real life is hard😂👌🏼
Very nicely done. After retiring recently and doing this stuff most of my career, I enjoyed watching your video in it's entirety.
If the rod scratches are not really deep you can buff with Emery cloth and it will be good. I have even used JB weld on some rods. Fill in the scratch or bent and polish. Works amazingly well. I have built tons of cylinders as a forklift mechanic for 23 years
Exactly:: JB weld to smooth out the pits & dings---works marvelous. Done this & it works great. The seals go bad from heat, extensive use, time,and unuse. GREAT vidio, thanks for the excellent instruction. Remember, all hydraulic fluids are "loaded" full of zinc-mercury compounds=== very toxic.
in addition to devcon epoxy, I've used orange or red glyptal - the industrial coating that's used on electric motors and to smooth the inside of race engine blocks to expedite oil flow back to the pan. Once it hardens, it's as tough as lexan. and takes as long to sand down as welding. I've also used sodium silicate (aka egg keep or waterglass) to fill in a long and deep scratch on a 4way controller piston. It's still holding pressure after more than a year in my Case FEL. I don't think it's hard enoug to withstand the long protracted extensions under load. The controller throw is much shorter, and all you need for it to do is either cover or open a given port.
I've used it on rust pitted motorcycle forks, worked great.
@@donaldstrishock3923 I also was thinking JB Weld. Maybe dig the spots out a little deeper so the JB Weld gets a good bite. That stuff is amazing. Where did you find the info on the toxins in hydraulic fluid. I want to learn more. Cheers.
Wow, I have a really old loader.with some rough spots and pitting on the rods and I was wondering if JB weld would do it. Thanks a ton
legit welded on an old rod , chucked it into a lathe and cleaned it up.
I like your drafting work pad for heavy parts repair!!! I love your channel, especially the classic bucket scene!!! Thank you!
I have the same backhoe and need to rebuild one of my stabilizer cylinders. Thanks for the video, it will be a big help! Its a good backhoe, I was impressed with its capabilities for a tractor mounted unit.
these are good videos, some people are visual learners and something like this that can be easy is scary if you've never seen the inside of one so thank you and I'd like to see more like this.
Your video made me think about the loads of fun I had changing seals out on Hyster forklifts back in my USAF days. So much fun...
4:00 been there, done that. I worked in the plastics industry many years repairing injection molding machines; a lot of oil, seals, electric motors, pistons, valves and heat ( which don't combine well ) and this brings back many ( mostly unpleasant ) memories
I really think standardization and part number identification is another key thing that differentiates the USA. I rarely have and issue identifying parts needed on USA manufactured units as the model is stamped on the neck and parts are listed in an IPB. Good videos, very fun to watch.
The materials that make up seals and the designs are always improving. So it's nice to use new seals on old cylinders without seal companies having to produce seals for every manufacturer. There's too many cylinder suppliers past and present to keep up.
Yes i agree but the bigger problem is seems no one knows what the rod finishes should be . and this leads to more leaking out of the cylinders, also manufactures of piston rods aren't sure either ( a chrome plated rod does not guarantee a no leak cylinder ) its all about the rod finish
Im an Australian country boy, I seen some mechanics and mechackis, you really are quite brilliant, im not one to piss in your pocket mate, I have been watching for a while and know you have skills.... BUT this to me is a major win, well played sir. Keep up the great work!
Nice job on the repair. It is nice to see someone with enough mechanical confidence to wade right in and make an unconventional repair. Thanks for sharing,
love the editing on your videos, very entertaining and informative, thank you. keep up the good work.
The primary reason hydraulic cylinders don't have manufacturer numbers is because they are manufactured/machined by 1,000s of more shops than the amount of equipment manufacturers there are. This started back in WW2 when home machine shops were contracted to produce hydraulics for the military. It was decided then that there would be a standard build for the cylinders, but would be easier to just match up the seals to fit. This way if the cylinders are different even between the same models of equipment, they can be repaired without any trouble. It's much like bearings, although bearings can have certain numbers (depending on the man.) most times you just match them using the old ones or my taking accurate measurements.
Seems like it would be easy enough to have standards for different sizes(stroke length, strength rating, etc.) And seals would have enough play to cover the small discrepancies between manufacturers
@@Kami8705 From my research, there are standards that manufacturers and shops go by but from my experience working in a hydraulic shop that's just a 'reference'. you can have 5 machines go down the line, using cylinders from 10 different shops (some are mom & pop shops) and the cylinders can be different 50 different ways. whether it's OD, ID, cylinder height, seal depth, cone placement, eye welds, thread pitch etc. Basically the manufacturers just say "we need the cylinder this length, this diameter, needs to have this much compression, and eye placement in this position with a tolerance of +/- .10" (3.5mm). so there's always variations.
Vickers numbers it's cylinders as do many other manufacturers ,but by no means all of them.the nuts aren't peened they're called prevailing torque nuts . aluminum pistons deform with use and commonly tighten up on the shaft.
So basically what you're saying is that hydraulic manufacturers have yet to figure out what electric motor manufacturers and really any heavy equipment manufacturer have already figured out. Something that, I dunno, _tags_ along.
@@custos3249 It's not so much that, as it is that it's easier to offer different sizes to allow for discrepancies than it is to try to make every manufacturer, shop, mom & pop shops, home welders, farmers, etc. to adhere to one set of standards. This allows for more flexibility and the option to build them the way you want. There are most standards out there however, for example, Case has their standard, John Deere, Caterpillar, Misco, etc. all have their standards and tolerances. so it's more of a convenience than anything and a very simple and easy way to allow for differences. Some cylinders also have model numbers and reference guides, just depends on who the manufacturer are.
For seals that have to pass over threads, I like to put some electrical tape over the threads temporarily. Lube up the seal and work it into place then remove the tape. It will help not cut the seal. Also I am surprised that these cylinders don't have replaceable bearings.
Cheap Indian tractor with cheap ways of doing things, you pay for what you get
@@Ekhcsez And it's held up for 12 years. No need for professional level equipment if you're not digging for a living.
@@erik_dk842 Yeah you just need to know what you're getting into, try to be gentle with it and understand it's going to need some extra maintenance
@@Ekhcsez Nothing wrong with a cheap Indian tractor. Went 12yrs without issue, can't say that about literally any John Deere product these days.
I stopped shopping with the brand entirely, especially since they try to keep owners from repairing their own equipment.
what i have always used are called bullets ( its a machined part fits over the threads and allows the seal to installed without damaging the ID
I am impressed with your energy to do the work with the tools and talent to make it happen.
I can see the pitting in the chrome coating of the shaft while you are taking the cylinder apart-YOU HAVE SOME AWESOME LIGHTING ON THIS VID !! Keep it up my Friend !!
I used to rebuild power steering components and on our more valuable classic steering racks we used to have fractures or snapped rods quite often. We would have them welded up and rechromed. Then we would grind them back on a special grinding lathe to the correct diameter so the new seals would fit like the originals
I have brazed over rust pits on hydraulic rods more than once. Excellent video! When you tipped the bucket over that was me a couple of weeks ago. Had a bucket of hydraulic oil and dropped the gland wrench and it tipped the bucket over.
Always handy to have a bag of sawdust ready for this exact instance.
Our family in East Tennessee have several of those Mahindra tractors with backhoes on them and they complain about the very same thing with the dealership not having any information on fixing the tractor when it breaks down. Nice video!
Most channels send there cylinders out to be repaired at huge costs. Great to see you rebuild and repair yours. I could definitely do a seal kit however no lathe for shaft repair. Very informative video thanks for sharing. Maybe they like to keep some mystic about them so they can charge huge prices for replacement and repairs.
I thought for sure you'd ruined that cylinder by welding over the scratch. Of course, I would have tried to level that with an angle grinder, handn't thought of a metal lathe! Good thing that cylinder is normally retracted so you don't have to worry about the weld rusting. Also surprised you had to lift the backhoe up with the bucket to get the stabilizers down. As for hydraulics, the one thing I can't wrap my head around is the plumbing where you can control multiple cylinders at variable rates simultaneously, like on bigger diggers.
Yeah. Lots of engineering involved in getting those cylinders to work well together at the same time, even on my little backhoe. Might be interesting to take the control valve assembly apart some day. The outriggers won’t fully lift the tractor on their own. Not fully necessary to use, but I find it more stable if I lift all the way. It’s a pretty heavy machine, weighing 12000 pounds with the backhoe on.
Once you own a lathe, the world becomes very different. Yes, I sharpened a pencil with my lathe, just cos.
Full static load , with tires off the ground . Boom and arm . pivot points with pins are bosses . Bless ya'll from hooterville, n.c.
Re-chroming a rod is pretty common. Sometimes they re-chrome the bores as well.
Take a backhoe reservoir where the handles are for exampl when you movevthe stick one way it pushes a rod (cant think of the zctual name) that has holes in it. Those holes allow the oil to flow a certain way and allow the hydraulic ram to move in or out based on the position of the rod with holes!! I hope that helps and i apologize i confuzed you with my explanation. Its not always easy for me to explain certain things..
Thanks for this great video, I also have a lathe at home and love using it for fixing stuff. It’s always more rewarding to actually fix something versus just buying everything new.
I totally agree. Based on just time and money, often it doesn't make sense to fix things, but based on my enjoyment, level of sanity, etc, it is totally worth it to me.
"It’s always more rewarding to actually fix something versus just buying everything new."
I'd have to argue if the fix costs significantly more in money and/or time than a new one, then it is not more rewarding.
@@shawbros in some instances I can agree but having the skills and accomplishing the task successfully is very rewarding mentally, in some instances when the assembly is difficult to purchase or on back order having the skills to repair it can actually get the tractor or equipment back in service faster and actually save more money and time on the job site. I prefer to have the ability to choose between repair options rather than be obligated to choose just one.
@@joelshopefullyhelpfulvideo3010 Agree. Often I fix things that technically take more time and therefore "cost more", but it gets me back in service faster which is much more important. Plus I have way more fun working in my shop than I would driving to the store, searching for something online, and/or waiting for delivery.
@@FarmCraft101 That's what keeps Cutting Edge Engineering in business, repairing big stuff for the mining industry in days, where spare parts would take weeks or months to come and be more expensive
Great instructional and informative video. I have a JD 4 in 1 bucket where both of the cylinders are starting to "sweat" pretty good. These videos are getting me prepared. Thanks
Thank you for taking the time to make and post this video. I knew very little before you're video and know, I realize I know even less lol... No, seriously, very helpful. I think I can attempt repairing my own cylinders on my very tired boom truck. 👍
This is a great channel,some things ive never come across or contemplated fixing or trying....love the idea of learning new skills...and the insight if something is fixable or not.And you have your own seal team...wow!
Frankly your tenacity for repairing stuff on your own is inspiring.
Not to mention the fact you go into detail and are humble enough to show your self laughing at your self and show off your screw ups is a rare thing.
These videos are not only entertaining but educational, I learned more in this 30min vid. then i think i ever picked up from college.
Keep up the great work mate!
worked with a mechanic, his trick was to warm them up with a heat gun till the rubber and plastic was more plyable.
i love our in depth videos, very nice work with the welds, came out clean!!
Somethings my college instructor talked about was having a crock pot of either water or the kind of oil thats being used in the system. Let the seals soak in it for a little while and it'll soften them up to make installing easier
That's a good tip.
I was scrolling down seeing if i can find your exact answer! You are absolutely correct, we would soak the oil rings in the hydralic fluid over night, in re assembing hydralic structs for aircraft landing struts, flight control struts! The soaking softens the oil rings just enough to make them a little more pliable, and much more easy to assemble! Same thing on rebuilding auto transmissions too! But this guy did a great job overall, and even in the shooting of the video. I also have a background as a machinist, I would done the same exact repair procesure!
@@MissionaryForMexico I always love hearing about the little tricks that makes life easier.
Thanks for sharing your story too!
Great job on your first go round with rebuilding! Love all the detail work and explanation. So far I have been lucky or maybe fortunate that JD and Cat supply part #'s for their cylinders. Really enjoyed all of the comments from experienced people on the subject. TIP: Add Never Seeze to the threads of the gland for an almost effortless rebuild next time. You can thank me later! 🙂
He forgot a procedure that will stop the hydraulic oil going past the rod seal/ scraper
@@mrfixitdellacertifiedfield5376 Do tell.
You are very mechanical talented. I respect that. It really helps to have all the tools. I’m glad I found your channel.
So satisfying to be able to fix something like that yourself...especially the scraped up shaft!
I agree about hyd seals. Good local seal and bearing shop is the only place I buy.
Who knew that I would love learning about hydraulics! I appreciate how well you explain everything. This channel is definitely one of my favorites!!
This video brought back so many memories. In 1977 I got a summer job in a shop that repaired cylinders and Pistons ... My job was to sand down the scratches on the pistons and polish the interior of the cylinders. The pistons were quite simple all I had to do was to mount them on a lathe and then polish off all the scratches with a belt sander mounted on an overhead rail. Started with a more aggressive belt and progressively polishing with finer and finer belts till the piston had a mirror finish. The cylinder was the same steps more or less, only difference was that I was using stones not belts. When all of that was done we changed out the packing reassemble ad the job went out the door. Did this for 3 months day in and day out 5 days a week 8 hrs a day. A long time ago but remember like it was yesterday...
One of the most interesting and educational videos I’ve ever seen! I especially loved the way you were able to restore the cilinder rod by welding … just amazing! Thanks for sharing! 👍😀
Caution! Maniacal laughing at 4:00! SMH. (That's a little embarrassing, but I didn't edit it out just for you, my awesome viewers!) I hope you all find the video entertaining and informative, and maybe even develop an appreciation of hydraulics. Cheers everybody, and have a great weekend! ***UPDATE: The dealer really did a disservice telling me to buy a new cylinder. It turns out that the backhoe on this machine is AMERICAN MADE, by a company called Bradco in Texas. If you contact Bradco, they do indeed sell seal kits for these cylinders. I don't think Mahindra is at fault for this, but rather the dealer who should have just said: "Hey, that backhoe is made by Bradco. Call them." I think the person I spoke with couldn't find info on the backhoe and so just gave me the easy answer: "Buy a new one."
Nah, you actually had a good idea just the exicution(I CAN'T figure out how to spell it...) To save the oil for wood treatment is what I would do, good idea with the clothes to get some back 🙂
My first thought with the outrigger cylinder was spray welding, I saw that on another YT channel, I think you did good with what you had, I mean, it works so well done
At 10.51 you said that you may need a new rod. Not a hydraulic expert by any means. But I had my front forks ( motorcycle ) rebuilt. By a company that did Hard Chrome refinishing. They measure the original size. Then build up the chrome. Then turn it back down to original size on part. It was cheaper than buying two new forks from Suzuki Japan. But you might want to consider this direction over buying what we call in Australia a RAM. Take care Aussie Jeff
So Mr Farmcraft having got nearer to the end of your Vid. What are the downsides over time of doing the repair the way you have. Not expert but have a lot of Hydraulic rams involved in my business. Genuinely interested. Aussie Jeff
@@jeffmoore2351 The chrome finish is to offer a near perfectly smooth surface for the seals to ride which helps prevent premature wear/failure as well as making the rods themselves far less susceptible to rust/corrosion. The likely issue, down the road, with MIGing then machining down the rods is that those spots can now rust. This can then lead to a wider failure of the chrome surface since that corrosion can also "get under" the existing chrome finish.
-
In a pinch it's probably fine while you're waiting for replacement rod to arrive in your shop and in this case will likely last a long time since the rod spends most of its time submerged in oil. On the flip side, if it were a boom rod that spends most of its time exposed, the failure time would likely be much sooner.
Outstanding, clear and easy to understand, you would make a good teacher, yes hydraulics are fascinating, hope your shoulder and fingernail are ok. Stay safe.
Thanks for the video, I liked how well you explained it, and I enjoyed your sense of humor!
It’s nice to see someone try to fix, or at least understand everything. Refreshing in todays world.
I’d guess you heard a lot of stories of what folks had to do in the 30’s, when you couldn’t get replacement parts.
Thanks!
The best way I've found to do this with little mess as possible, extend or retract the cylinder all the way so you'll have oil in one side of the piston, not both. Take both hoses loose BUT run a hose from the line that has all the oil in it into your bucket and take a ratchet strap or come along and pull or push the rod in or out to squeeze the oil into the hose run in the bucket. And I'd just polish the scratches on the outrigger cylinder. There you go.
I use compressed air to extend and contract the rod to move oil out of the cylinder.
keep your videos coming ... they are great, I have watched everyone
Thanks I did learn some things I didnt know. Never hurts to extend your knowledge.
First time on your channel, in the 70s I worked in A commercial bakery all the seals in gearboxes were numbered we just went to this seal interchange book , no computers yet, matched up the number and called downtown got the right seals the first time.
Good job on the refit of the hydraulic cylinders - a very similar way that we had to repair some of our small ones (In an Iron Foundry) we have welded them too. A couple of pointers for the future. When putting seals on anything use some lubrication that is compatible whenever the seal is not going to be touched by you again - this stops any damage and ensures a good seal. Hydraulic oil is non compressible and grease isn't either so its fine. The piston/annulus nut is sometimes held on by peening to stop it coming off at pressure. Lastly most hydraulic cylinders are bespoke for the job and tend to be made to fit a purpose unlike pneumatic cylinders which are spec'd whilst designing. I have found numbers on them in the past but it is rare.
When discussing rods, glands and even stroke length, gentlemen do not describe particulars.
Very nice job!! I have only rebuilt 2 hydraulic cylinders and both were on my JLG 1932 scissor lift. The first was a very small brake cylinder and the other was a partial rebuild on the lift cylinder. The small cylinder was a real pain to rebuild. I would love to have you as a neighbor!!
I dito what Blake Adams said, awesome work. I really like what you do and the observations you make. It makes me feel this country isn't completely falling a part.
Great video presentation! It popped up after I watched one trying to figure out an easier way to square a round drill hole. I've done at least one cylinder using TIG with very good results, and recently got lucky on another using a cheap but incredibly efficient 12 pound inverter stick welder on an extension cord, but I've found that Devcon plastic steel putty beats lugging a welder portable generator to a remote location. It's not really expensive; in bulk, at $80 for a one pound kit it comes out way less per serving than buying multiple tubes of lesser epoxies for shop and home use from the hardware store, and performance wise, is incredibly strong and machines a lot like hardened aluminum or soft steel. I wore a gouge in one of the cylinders in the 4 way shuttle valve on my front end loader controller a few years ago. I angle-drilled a few very small holes into the base of the gouge to act as an anchor for the Devcon and used a strip of wet or dry crankshaft polishing cloth to run it down to flush with the original surface, and all I've ever seen since is some occasional weeping when the bucket is lifting more than it probably ought to be. I also used Devcon to repair a deep groove in the crank snout of a motorcycle engine that was pouring oil out and the only speedy sleeve I could find was ten days away.
If you think catching your fingernail on that seal hurt, imagine how it would feel if your ring got caught on a chip.
Please -- no rings, watches, or long hair when working near rotating machinery.
Thanks for an interesting video.
Ken
I didn't think the weld scratch repair would work so well. Nicely done. You did a nice job adjusting the lathe to get it to run true and a very nice job turning that weld down to near the original surface and an exceptional job of blending it in with the sanding.
Is rechroming the rod necessary because of the repair?
Impressive work on repairing that rod there is no doubt in my mind it will work perfectly. You saved some where between $200 and $500 depending on the price for a new cylinder from the dealer or replacing the rod. I was thinking of brazing them scratch's but; the wire feed did a great job. Having a lathe and the ability to run it helped out alot. The other idea of protecting the rod from weld spatter with oil was a must. Great video
Putting the "wrong" oil can cause the o-rings, seals or anything rubber to deteriorate/fail.
YUP!
Some machines don’t use hydraulic fluid just old 30 w with a additive case construction equipment is one of them
It's such a small amount of oil that is used it has no effect on the seals.
Support right to repair! Companies should provide at the very least information about user serviceable parts.
Totally agree.
Some of this may be left over from the WW2 buildup, where every shop in the US was building something. Small machine shops usually got tasked with hydraulic cylinders. So one cylinder might be from Oshkosh, the next one might be from Tallahassee. And the exact dimensions would all be a little different, which means slightly different seal sizes.
Really enjoy your videos. Thanks for showing the bucket falling over. I thought I was the only one that those things happened to. : )
This was a TH-cam recommendation that auto started and I will likely never do this in my life, but boy what an interesting and well presented video that made me watch from start to end. And your gland comment did make me smile. A perfectly innocent mechanical word with another meaning. Much like screw, knob, flange and gusset (words which used to get flagged by our email server).
I do believe rods are chromed so make sure to always store the stabilizer upright so it doesn't rust in the weld repair. But you did save a good chunk of change.
Yeah. I didn't explain it well, but while the backhoe is sitting on the tractor most of the time it will be fully retracted. Hopefully it will last long term.
you started talking repairing the outrigger, and i was like "well, you've got a welding machine and lathe" was not disappointed.
Edit: Also, been meaning to ask, does your backhoe run off the PTO or do you have remotes for the hydraulics on the tractor?
Remote hydraulics.
takes me back to working on the farm, everything seems to work great until hay season then the hydraulics all go south,lol Nice repair on the out rigger, I always wondered why that wouldn't work, but never had a lathe to try it. Nice!
Just finished watching your porch replacement video and “had” to see this one. This may be handy in the future. Mine is a little smaller than yours, but I have one👊
13:25 to reorder the seals you just need to bring gland and piston to the seal shop they will check the size and give the seals to you also it's better if you put custom made hydraulic because when they make the seals as per size they do some adjustment in the Grip of seal to make sure that will not leak again even after reaping the Chrome ROD and TUBE
Looks like you would be interesting in researching "Right to Repair". Louis Rossman could use some more people spreading the word.
@4:00 that's just the laugh that makes me love your videos!
I'd love to have an uncle/neighbor like you to learn from an have fun working with.
Great video and really enjoying watching all your older videos so I am up to date. What would we do if a seal had never been invented???
How does/did you bleed the air out of the piston? Does it just go back to the reservoir or the hydraulic fluid tank and it would just fill the void as the piston is extended and retracted to it's maximum travel position? Thanks for the cool video! All throughout this video I've been getting uncle bumblefuck vibes
It will return to reservoir within a couple cycles.
@@Lucas12v ahh i thought that would be the case. Im not experienced mechanically at all but logic would suggest that that's how it'll happen. Cheers fella👍
Yeah, the hydraulic reserve tank is not under pressure, so the basically just dumps in. The first cycles I dumped in air instead of oil, while the pump quickly filled the cylinders. It's a cool system. Would be such a pain if you had to bleed them.
@@FarmCraft101 I had to bleed brakes in a Piper Tomahawk (light airplane). Bleep that!
@@ScottKenny1978 oh poor boy...i once had a rolls royce silver spur...these brakes...thats a mechanics nightmare...that abdomination happens when aircraft engineers work on cars...
I always wonder why there is no cover over the rods to help with dirt and dmg.
I know. It seems like a kevlar sleeve that could fold and unfold with cycling would help. But maybe they would trap water and make things worse.
Very well done sir. Before I watched this video, the hydraulic cylinders on my tractor were a complete mystery to me. Thank you.
Watching you work that lathe took me back many many years when I ran a Warner Swayze WW2 vintage turret lathe making cast iron and steel parts for John Deere tractors. The best tractors in the world by the way.
The way that seal fell apart, that is planned obsolescence. The alchemists at the manufacture would have made the compound slightly incompatible with oil, so it slowly gets eaten away. But not quick enough to make a problem while in warranty.
You did exactly what a shop would do to fix a ram, my ex grandfather in law, and my ex father in law where both very good tool and die makers, they did so many rams as a side hustle, cause they had the tools, and machines, and knowledge to do so, I am truly impressed sir, way to go, I subbed.
Great video it's amazing how you filled in the imperfections. The right tools are a Godsend also. Awesome job
2:40 Thank you, I've never thought about loosening the gland before taking it off! I've always taken the ram off then wrestled with afterwards.
Nice precision work on that shaft.