Hydraulic Cylinder Trunnion Mount Repair - Manual Machining 

My family owned and operated a hydraulic machine shop for over 30 years and dad always told me we are a repair shop not a replace shop, nice work.

It is amazing how many of life's problems can be solved with a cutting torch.

Always good to see a repair. Too much stuff is thrown away these days - we need more people who are willing to have things repaired, and more people who can do the repairs. It is the original form of recycling and minimizing consumption of raw materials. Also - awesome approach. When I looked at the part at the start of the vid, I paused it. Thought through how I would do it, then watched. I'd have done it pretty much the same way - so that gave me a bit of a boost first thing on a Saturday. Cheers!

Don’t waste your time on the Haters. Keep doing good work making money while they sit back and watch you! Keep up the great work…

Nice work saving that trunnion mount and saving the customer a fortune. That was a good idea center drilling the ends, so that if the job ever comes back again later, you have the centers there already. With odd repairs like this, customers can rely on you to get the job done for them. It's good to be able to repair things rather than having to replace them. Wherever possible, I try to fix what I have whenever it's possible with replacement being a last resort if something is beyond repair.

Concentrate on the vast majority of positive comments. There will always be a smart Alec who thinks they know best but you do great work and it's entertaining, as well!

This is a great video, very straightforward repair and yet very technical.

Great repair Josh! I always love seeing and learning different ways to fix, repair, or manufacture something! You have become one of my “new never miss an episode” creators! Keep up the good work!

This was an interesting job and I enjoyed watching how you went about doing this, thankd

Making money and saving money its a win win!

Nice work.

Thank You Sir, Always enjoy your videos.

Nice repair Josh.

@Josh, Saturday always brings something juicy to my timeline, thanks a ton

Well done

Nothing really to say just an obligatory algorithm boost for the channel. Keep up the good work. 👍👍

Nice repair Josh 👍👍

You do such awesome work Josh, just never get tired of watching someone so good at what they do.

Thanks for sharing good repair

That’s a nice sharp drill 👍

Do it right the first time. Thanks for the video keep on keeping on.

Thank youJosh!

Nice save, Josh. That's not just a quick job--that's a repeat customer. See you in the next one! Cheers.

This is a great show from an old tool maker apprentice ( 1964 to 1968 ). Please keep up the great work with the apprentice programs. Even if the CNC machining will outdo the old matching way, the apprentice programs will still teach great matching and shop experience.

That's a very nice repair

Nice work Josh. I was expecting to see the trunnion to be harder. Looked almost like mild steel. I agree with your customers decision to sleeve the trunnion shaft. Thanks for sharing the process. Have a good evening.

I like the old Monarch lathe.

Nice work big dog

I sure hope the folks at #AnchorLube are taking care of you. I never heard of them before you brought them up, and you faithfully promote the product in nearly every video.

Hi Josh & it's is Randy and i like yours video is cool & Thanks Josh Friends Randy

Josh I always love your repair videos. Someday i would like to see you make a video of the correct way to use measuring tools. I actually mean more than just how to read a micrometer but the techniques of measuring. Examples taking measurements while still in the lathe chuck or on the mill table and also any kinds of set up measurements you might like to include. May be a good lesson for Connor as well. As always thanks for bringing us along. As we all know making chips is the easy part of machining. Hitting the numbers and good workflow/set-up etc. is the part that separates us all from the cave dwellers.

Well done repair Josh. Great to see parts that are repairable actually repaired. When managing a stamping plant toolroom we always designed to allow repair/salvage of sections to avoid waste and excessive costs. Other plants with our "family" spent on large spare sections and never looked for smart economical solutions. Just throw money down the drain. So hats off keep up the great work!

hi there nice job john

The other reason you do work like that is because its fun and you make money while the customer save money.

Josh, I can tell from here in Florida it is getting warm out in Spooner, you have your Summer Haircut rockin' .....Best Wishes.....Paul

JOSH I think it was a very economic way to fix it and I think your customer will be well pleased nice video keep up the good work😊

Once again, nice work. I am wary of welding parts like this. Just too many unknowns.

Thanks!

Love the press fits. If I had to do press fits, it would give me fits. :)

I find jobs like this fascinating, these are what machining is about for me...fixing those parts that often are irreplaceable.... #Anchorlube seems great but I don't think I can get it easily in the UK so I use neatsfoot oil, which works very well for me, I think i saw it in an old book somewhere...might have been someones great grandmachinist that mentioned it to be honest, but its a good one Always good to help people out.

18:03 It will help if you had the sleeve on a piece of fire brick or other refractory material to keep the arbor plate from drawing the heat away.

Good morning, Josh. 😊 Very nice repair, but every time a press fit, whether heated or cooled with LN2, I get really nervous watching the bushing go on, especially when it grabs and doesn't drop right down on the shaft! LOL Thanks for another excellent video.

Good fix there Josh, steady work and well executed as always, bit of a bum twitcher when that 1st sleeve went on mind you, thanks for sharing and best wishes

Great video - I cannot believe how quiet that lathe is - my colchester master sounds like a sack of spanner down a staircase compared to that - amazing as that looks like a vintage machine.

I've done a couple of these in my time.. I use inner bearing races where possible.

If you use a spot drill you won't get the drill bit flopping 1:41 around drilling oversized. Spot drill is way better. 142 degree Keep up the good work, I enjoy watching it.

I would have turned down the badly damaged end of the trunion first, to the minimum size needed to clean it up, then made the sleeves to that size. The big issue with this type of repair in this application is the reduced strength of the smaller diameter connecting into the trunion.

Customer is always right and all, but I'd think in this case a weld up and turn would be better than making the trunions even smaller than they already are worn for strength.

Hi Josh, When you put that 1st sleeve on... my pucker factor went on overload.....wooooo...that was a close one...the 2nd one you were making sure.....LOL....thinks we are gonna have to take out stock in Anchor lube, is about all I use now.....been a crazy week here...will text ya...Excellent vid and camera work, they keep getting better nd better....When is Connor leaving? Stuart and I agree wholeheartedly. Don

Nice cost effective repair, not sure why the negative comments on reducing diameter, ref strength, a single shaft of diameter 25mm has a shear value of 40,000 kgs, it would need some crazy high hydraulic pressure to excert 2 x 40,000 kgs in that sized cylinder. Remember, if pin diameter was too small, it would be difficult to lubricate, ref high force over small area (Stress)

I like to chill the smaller part also. Every little bit helps.

Is that large vernier caliper temperature compensated? Amazing at how accurate the measuring tools themselves are, and the lathes/mills.

I run a horizontal boring mill and never use reamers. If its a tight tolerance, I always bore it.

Why did you bore the sleeves first? Wouldn't you want to know how much you had to take off the shafts first? Not criticizing, just curious.

Listen process cylinder trunnion mount repair friends

What did you use to make the sleeves? Really enjoy your channel, as I'm still learning, but do a lot of similar work repairing old/obsolete parts for heavy equipment/farmers/etc.

Morning

I think I’ve counted 3 lathes that you own(may be more?). I think two monarchs and one import? Whats your reason for using one particular lathe over the other on a project that would fit the swing of all the lathes?

I see and have done many universal joints in heavy equipment. In my early days, a universal joint was around thirty or so dollars. Now that same joint is around seven hundred and some are much more. All said and done, if your running say a thousand trucks on the road, a good many joints are replaced for minimum wear yet will go out if left unattended. Those joints are already center drilled for grease or oil so centering this joint would save some time and money. It might only save say fifty dollars on a joint repair but if you have say two hundred joints that only need fifty a fifty dollar saving.... worded wrong but hoping you are able to figure out what I mean. So if you save only fifty dollars on a joint but you have say two hundred joints that are repairable... that would come to ten thousand dollars, and to a poor man, or not even a poor man but a guy who knows dollar saved is a dollar earned, ten thousand dollars would make the price of greasing those joints a bit cheaper as well. Great video, I never learned really all the ways of using a lathe but really should of taken time to learn how.

Josh has the Anchor lube ever given you any rust problems on parts or the machines. I have been wanting to try it but herd mixed openions on the rust it may cause. Enjoyed the video and a very good aproach to fixing the problem with a sleve.

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Oops sorry I called in the middle of your set up.

Not hating, but why Anchor lube instead of flood coolant for drilling/reaming? seems like you'd want more chip evacuation/coolant to prevent heat buildup/lubricity on those inner operations

Does the jaw pressure make any marks on the sealing surface

At 17:57 I need to know what that bearing came off of on the floor I have a few laying around and would like to get a idea and btw I love the channel hope all is well and god bless

The trunnions that worn. What's the saddles look like?

As a non-machinist I was wondering: when would you use Loctite in a situation like this? Thanks.

To all the haters, please list you youtube channels so I see you be perfect! Oh you don't do one do you.

I thought the reamer would have cut to size being as long as it was.

what is the material? why not weld build up and machine back down? other than customer request?

I am just curious have you personally had a welded trunion job fail? I have worked at a hydraulic repair shop for 9 years and we have welded up 100s of trunions and have never had a return for failure.

What do you do with your chips and other discards?

geez a guy askes one question and a whole video comes about lol

one hour after posting 1300 views. Not too shabby for 8 AM Eastern time.

Is something wrong with the King? You haven’t used it in a while.

Im assuming this is one of those jobs that the placement of the 2 ends doesnt matter as much as they are straight to each other.

Besides saving the customer a ton of money, there is the issue of getting the replacement part in a timely manner.....some of the lead times are for parts is months.

100k give away?

I can not believe that you were able to fix that part and save the customer money. I thought that the damage was beyond repair. I am glad that you were able to make the sleeve, press it on and mill to size. It is always good to watch you work. I wish I had good health and a skill. Thanks for the video and your willingness to share with others. I am always looking forward to seeing what you will fix next. Say HI to Rocky, he is a good dog.

Josh, another good video, thank you for your efforts in recording. Sigh, not intending to be critical, however I found it a little confusing when you mixed SI with English/US customary, while I can make some equivalencies, switching back and forth was not helpful.

Could you have tig welded the bad trunion

Did you have to stone lap the sealing surface where the 4 jaw marred it with the teeth? Or were those two divots there at the start?

seems like the metal you are turning is very soft steel

Only way to improve that would be to weld the sleeves to the block so they'd be structural. I like that green lathe. It's the perfect combination of silent working and clunky actuation. Like big, sharp, well oiled detents. Very satisfying.

That’s using your noggin

7:00 you need a tail stock chuck

Bad idea to cut those trunnions down only makes them weaker. I understand it was a customer request but i wouldnt do it for liability reasons . Good video though sir

You're bullshiting around with these videos. When you you getting back to the Crain videos.

It is extremely worn, not wore. Simple past: it or it was wore out. Adjective: it is worn adjective affected by wear; damaged by long use “worn threads on the screw” “a worn suit” “the worn pockets on the jacket”

I’m not a machinist, I’m just a fan of what you do. I had a quick question and maybe I missed it in the video. The ID of those bushings seem to be off center making one side thin, at least how they appeared to me. Is that going to make them wear unevenly? Not trying to dig on you but any means, I am just trying to understand the process. Love your content.

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