How to REPAIR Hydraulic Jacks & How they WORK Bottle, Floor, Pallet, ETC
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- Опубліковано 23 лют 2020
- Everything you thought you never wanted to know about hydraulic jacks!
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Not that it's important but I'm working on a Crown PTH50 5,000lb pallet jack. It was given to me missing half the pump parts from a failed repair by a local mechanic. NOTE keep track of all your parts. I had to buy a spare junk unit for $40 and a repair kit for another $40.
FLOOR JACK INFO:
The Safety Overload valve (cap that says DO NOT OPEN/ADJUST/TOUCH etc) is a valve that allows pressure to bypass/release if someone tries to lift something heavier than the jacks rating. This is generally only found on floor jacks and is a simple check ball and heavy duty spring. It just needs the spring pressure to hold the check ball in place. So tightening it to collapse the spring and then back it off anywhere from a 1/2-a few turns as long as the spring is still under pressure is fine. Most I've come across are around 1.5-2 turns out. It will just bleed off under heavy load/not allow you to lift if you have it set to light(more turns out). I always count the turns in to collapse the spring and then remove it so I can set it back. For safety it's better to have it set too light and you can adjust it after everything is rebuilt/assembled with a load on it. Set it light and lift the heaviest thing you have. For 3ton floor jacks I generally do the full front/both wheels of a truck, which is around 2 tons. The concern is if it is set too heavy and someone tries to lift a 4 ton object with a 3 ton jack(it will do it) the seals could blow or the metal structure of the jack could collapse, dropping the jack instantly. However most of use will never put a 3 ton jack to anything more than 1-2 tons so really not a huge concern how tight you set it.
OIL FOR YOUR JACK:
Any el cheapo oil is going to be the same or better than came from the 3rd world factory. Any oil will actually work; even power steering fluid, motor oil, etc. You just want a thin non-detergent oil(most hydraulic oil is iso 32/sae10) so the particulates settle out and don't float around the system. This is a good oil amzn.to/2us17lr . Detergent oils pick up and carry the junk with it and allow scoring/seal damage; which you don't want. Of course the cheaper oils will have less antiwear stuff in them, but unless you're using it in a high production facility it won't matter. You can put iso68/sae20 non-detergent oil in a worn out jack to get more life or even power steering + stop leak to swell the seals and get a few months/years. Lucas makes a good stop leak/thickener you can add to help get years out of a worn out jack amzn.to/2us0AQt
sixtyfiveford
Bottle Jack
Floor Jack
Engine Hoist / Cherry Picker
Porta Ram - Авто та транспорт
![MUST HAVE TOOL! How To Fix or Rebuild a Floor Jack [BOTTLE JACK]](http://i.ytimg.com/vi/sk0FF6GFlqA/mqdefault.jpg)
I'm only 3 minutes into this and I've got to stop and tell you how much I appreciate the analogy with the conduit, springs and pool balls. That's awesome and super easy to understand.
Glad it was helpful!
FINALLY, someone that actually explains how these jacks mechanically work. But also how, and WHY they fail.
Can't tell you how many videos I've just sat through with "How to "fix" your blah blah jack" in the title, only to find out their genius solution is simply how to go about bleeding air out of the jack. Or adding oil. Bleeding is NOT "FIXING" a jack.
Anyway, thanks brother man. Your video helped me out alot. Outstanding video! 👍
On the shaft pitting it may still be salvageable. I've used this technique to restore old car brake caliper pistons that you can no longer buy. Clean the shaft up real good with brake cleaner, wipe the pitted area with JB Weld to fill the pits, once it dries sand it smooth till the JB Weld is flush with the surface.
I've heard people having good luck with that method.
I have a practically brand new 27 ton Remington wood splitter that I was getting ready to do the same thing, my friend was trying to separate a log that didn't break all the way and he hit the shaft about half way in with a hatchet and marred it pretty good and now it leaks down after a while unless you store it horizontally
@@oldmountainmarineandmetals9736 the moral of that story: don't lend your log splitter out.
Dude you make everything look so easy, giving us confidence to tackle things ourselves. Good job !
I appreciate that!
I wish I found this video sooner. I had a pallet jack that was leaking and I just tossed it out. I got it for free so no big loss. And I was able to find a used one that works great for only 40 bucks. Very informative video. Thank you
You seem to always go the extra step in all your videos and I thank you for that.
Hey Thanks. I'm glad you liked it.
I need to borrow some jacks and rip em apart. It's for science! Thanks for some good edumacation, yet once again. I was clueless, but now I'm clued in.
If it's for science, of course.
Yes ripem apart is how we learn. Nice explanation bud. 👍
That's the only way.
Fantastic education. So many people just give up on a rebuild but like you say, if You can find that parts the higher ends jacks are worth saving.
Thanks, I'm glad you liked it.
Thank you for the video. You have the best and straight to the point hydraulic jack video on the internet. Kudos!
Thank you for down to earth explaination. Due to large liability concerns, Harbor Freight jacks are built well. Still, with any jack, don't ever trust it! At least place a tire at a support point. My 2 cents.
Harbor Freight and built well. hmm now that's an oxymoron.
Guess they forgot that with Jack stands
My brand new harbor freight jack was low on fluid out of the box
I've had a large hydraulic press for a loong time, and for years, not working... It's too expensive for me to "just buy a new one" and I'm way too stubborn to throw it... I've looked at soooo many videos every few months and never find that ONE, that explains all this, that you just did.. and you made it sound and look sooo easy 👌 thanks man !!
I know what I'll be doing tomorrow... dig that press out, from all the crap that's been put on top of it and all around it in the garage for the past few years 😂
I'm rewatching this video right now because I've got a Harbor freight floorjack that will pump up, but it won't hold. I bled it several times. No air bubbles. So I think the U cup seal is probably leaking. However I missed the part in watching this earlier about you may not be able to get parts, lol. Plus, I cannot find a way to get the huge nut off the end of the hydraulic cylinder loose. I think I just need a new jack. PS, YOU ARE THE ONLY VIDEO ON YOU TUBE THAT SHOWS THE COMPLETE PICTURE FOR JACK REBUILDING. Thanks for that. ❤
This video is right on time. I just dragged home a lift table that needs repair. The table will lift but drops when a load is put on it. This video was a good refresher to point me in the right directions. Thanks!
Lift table=awesome. Thanks, I'm glad you liked it.
One of the best ways of seating the Ball in the valve is to make sure the seal surface is clean, (and not so badly mutilated it needs recutting!) Fit the ball and tap it LIGHTLY against its seat a few times with a hammer and drift. The ball should form its own seat. (Sorry if this is elsewhere in comments but I did a quick trawl and didn't see one.)😉
And replace the steel ball which is hammered!!!
@@hishamchohan494 You will need to do this if you do not understand the words, " Tap"
and
"Lightly"
I hope this helps you and your hammer.
@@JimiHendrix998 thanks ,I'll try it in the future
Great video, thanks for the tutorial on check valves, that was awesome! My only 2 cents... be extra clean with the fluid. I once repaired my dad's floor jack (it suddenly dropped after jacking up the front end of a '69 Cadillac). The jack was only 2 years old, never abused. Upon opening, I found nothing wrong with the seals. I meticulously cleaned it, added new fluid and it's been working fine for the past 40 years. I suspect a bit of dirt, grain of sand or something found it's way between the seal and cylinder. Of course I went back to fixing the starter motor on that old Cadi, and something I can't stress enough... SAFELY USE JACK STANDS ALWAYS! The jack failed without warning, when it had already lifted the car. I was reaching for a jack stand and it just dropped at normal pace. It wouldn't lift anything after that.
Great info, thanks.
Great video! well done! I have used the tail end of a cut off drill bit with valve lapping compound - chucked in a drill backwards. Liked !!
Hey Thanks.
I've had a big old floor jack that didn't work for 20 years. Its a monster but it wouldn't hold so its sat in the back of the shed. Too expensive to get it fixed and too good to throw away.
I've watched a 100 hydraulics videos and got my head around all the theory but not the down and dirty How To.
After watching your video coupled with high school physics and basic school of life engineering I reckon Im ready to have a go. Thanks to your great video and down to earth instruction.
Thank you.
6 Jack repair video's and I finally found this guy. The only PRO that knows whats happening and how to fix it. THANK YOU :) .
Thanks, I'm glad you liked it.
As an almost lifelong mechanic I've enjoyed taking things apart to get a better understanding of things, mostly things that have stopped working of course, for failure analysis. Keep the faith Ford man
I think that is the best way to learn.
Hydrauilc repair first rule: don't lose your balls.
Second rule: notice the symptoms and notice how they had it. Inspect for the cause on teardown.
Third : clean and inspect during diagnosis and under the paint for identifying numbers and name.
When inspecting tearing down and diagnosing, have a container to keep it all if you have to wait. Use a container you won't need to use for something else. Keep moisture away. If you find similar jacks or rams for cheap you can find answers that aren't in drawings on a unit that's not been torn down.
The pipe, pool ball & spring make a great representation of a check valve.
Really loved the ending !!!!!
Hey thanks. I'm glad you enjoyed it.
I am an enginner, but looking at your balls helped me to understand this working principle a lot :D
Had those snap ring pliers for 20+ yrs they are great
Poly pack seals is what they are called
Most all hydraulic shops sell them so you could pretty much rebuild any jack
Not quite that simple most Jack's built in the last 30 years are chinese junk that use special sized metric seals that are hard to come by. They love to put at least 1 custom sized seal that you cant get unless you buy a 40 dollar factory seal kit, that most of the time is not the correct parts anyway due to poor documentation. They are built to be disposable. If you can do it yourself it might be worthwhile. I used to run a hydraulics repair shop that's how I know.
Another great video. I have always wondered about jacks and if you can repair them, this video shows a lot of great information. Thank you.
Hey Thanks.
I like your handle: My first vehicle was a 65 Ford 1/2 ton blue and white two tone, production date was 1/9/65 w/ 352cc and a three on the tree. My dad bought it off the guy that lived behind us who had brought it up from the lower 48 on his highboy - still had the new car smell.
That's neat! They're good, solid, hard working, but basic trucks.
Came here for oil suggestions..lol
At least I know everything else about bottle jacks now.
Your pipe and ball demo should help a lot of folks understand the operation. Very well done! Nice that your furry friend will ride along with you.
Hey thanks.
I really liked your use of the pipes and pool balls. Excellent visual!
Great lesson,I wish there was a Fix all jack parts store , I have some old monster heavy floor jacks only 2 and 3 ton rated and comparing with today's jacks the way the older ones are built they should be able to lift 50 tons , I have one old jack that uses air that folds out and lifts from under the frames but it has a harder time lifting a pick up with a big Diesel engine but it will lift all cars and its so much faster and safer than the floor jacks thanks TANK
I found a couple sites that have a lot, but none are completely dedicated to jacks.
Well I learned something new today! Thanks for your demonstration of how the internals of a Jack actually work!
Thank you very much, your other videos on jacks are very helpful as well. I went through all my Jack’s except one.
The end part was awesome, I rode one of them many times. Almost broke my neck a few times to though. But it’s worth it.
Sure appreciate your insight and your show.
Happy trails
Luke
Riding pallet jacks is a great time.
sixtyfiveford 👍🏼
I rarely leave comments, but I really enjoy your channel. I’m always stumped on things when I’m in my tiny shop. Thanks! I’m learning new things.
Hey Thanks. I enjoy reading everyone's comments and like to hear their feedback.
My favorite past time when working retail in high school. Pallet jack races through the back room. 😆
The smooth floor of a large warehouse is a blast. Hours of fun.
Best explanation I have seen of how a jack works. I have a pile of them around that don't work. I am not a Ford man but won't hold that against you. I like to repair most anything old manual and simple with no computers involved.
Thanks.
Wow awesome video, great explanation and illustration. This guy really knows his way around hydraulic jacks👌
Thanks, I'm glad you liked it.
Another 101 vid on how things work and how to fix them,
I swear 20 mins here is 4 yr's of shop,
Thanks man.
Thanks, I'm glad you liked it.
"It does do make it easier" love it bud. Keep the mannerisms they make it feel better in here
Hey Thanks for watching.
For reconditioning the check ball seat, I would silver solder a same diameter ball bearing to a piece of round stock of slightly smaller diameter (even a cut off nail could serve). A lathe would be useful for centering the ball/round stock for brazing. Then use a cordless drill and lapping paste to recon the seat. It is evident where Ginger learned her tricks from!
Good idea
Crown ..the Cadillac of pallet jacks.. they iift and roll better than any other.. well worth rebuilding. Thanks fir sharing.
They really do make a great pallet jack. My uncle used to be a Crown service tech and had nothing but great things to say about them.
Truer words...
I have been waiting 40 years for this tutorial, NOW I can fix those 2 60 year old jacks!
Thanks, I'm glad you liked it.
You are such a good teacher
Great info. You broke it all down into nice simple little bites. A complete disassembly and rebuild with your explanations would have been good though.
Thanks.
Gr8 video. I had to dump a garage jack as I could get a 50 cent seal the right size. Well I use some parts off it on a old junk one I found, which was missing wheels and handle and spring. It also had water I'm the oil. Funny I overfill the oil and the rubber grommet blow out and got oil all over my face. Lucky I didn't get it in my eyes. I could not find the grommet. So I sealed the hole with silicone. That was second years ago and still going strong
That's awesome!
I've had good luck with putting Teflon tape on crush wash that refusrs to seal just layer top And bottom
That's a good idea!
Great dog! Looks to have a very good disposition and well trained!
Only problem is she only likes me and is a jerk to everyone else. But I guess that's not my problem. Thanks, I'm glad you liked it.
A good thing to note that if you don't have the parts but you think there might be shmoo or water or something causing the balls to seat fully and you take it apart to clean it out DO NOT think taking the seals out and cleaning them will help. The only thing your going to do is mess up a seal that may have been totally fine.
Well said.
Awesome ! I use to work for a pre cast company , they bought 50 ton hydraulic jacks for the job then trashed them after !
Hey Thanks.
Your explanation and model display was great. Excellent video.
Hey Thanks.
That's some good info Moe. I have a smaller one that I was saving to use as a boat anchor, but maybe I'll try to fix it now.
You can never have too many boat anchors kicking around.
love your intro....you get right to the subject. plz don't ever change it.
Hey Thanks, I'm glad you liked it.
Brilliant visualisation. Thank you!
Thanks, I'm glad you liked it.
This is why I watch UA-cam. Excellent video.
Hey Thanks.
Great INSTRUCTION "
Great INSTRUCTOR "
Thanks Friend !"
This video got me all jacked up now. haha Good info, thanks Moe.
Haha.... I had an entire bit about not Jacking people around in the video but it got edited out.
Great explanation of how these jacks work , Thanks
That's how I got my hydraulic niggle lift for only $50. The guy thought he needed a new hydraulic jack..... Had a missing check ball. Guess he tried to do something and never could get it working afterwords. Win for me lol. Great way you illustrated that
Can't beat that!
Best vid i've seen for a while, great content! Keep it up and you'll have a million subscribers in no time
Thanks, I'm glad you liked it.
Thank you so much! I actually took a the relief valve out of a Harbor Freight press and thought I had the Jack laying over far enough... No no and I have been wondering how to fill the stupid thing full of fluid cuz I couldn't find anything online to tell me how to fill it full of fluid. Thank you so much.
Thanks, I'm glad you liked it.
I had a new one that had parts in backwards and another new one that wouldn’t bleed... the none bleeder was exchanged but I wish I could find some nice 3 ton floorjack. Dream of having 4 and building a kickstand to lock them so I wouldn’t have to use jack stands. Someday... or a two post lol
2 post lift would be nice.
Great visual on the check valve. I was doing a repair/video on a old floor jack for a friend of mine. His jack would only come down about a third of the way. I had to "back burner" it. With the info you provided I have to take another look at it. Stay well, Joe Z
I would imagine there is a mechanical obstruction in the floor jack linkage.
@@sixtyfiveford That is what I though when I started on it but could not find anything that looked out of place. I have to have him bring it over & take another look.
Maybe over filled with oil? If he filled it full with the ram extended?
@@jesselawson1169 If it had a screw in vent/fill plug that could be. Most are rubber but you can see in the video I do have one screw in style.
@@jesselawson1169 Thank you . I did try draining some of it but still a no go. I have to have him bring it back & give it another go.
Stay well, Joe Z
So I'm guessing this is a simplified version of what the check balls do in the value body of a transmission. I know we have perfected many ideas and have reached levels beyond levels of performance but just think about the level of brain power of the people who thought up these concepts when NOTHING WAS IN EXISTENCE OF THE SORT!
Inspiration from things in nature or whatever into some manufactured tool that we don't even know life without!
Those people didn't know life with it so the created it! That is something I don't think we ever give enough credit or never will even fully understand what it took to make that leap of creation into life we know today!
Much Respect to those generations before us we so often take for granted and not even meaning to! We just don't look back enough at how we got to where we are things now move so rapidly!
We are the only generation to know what 8 tracks were to records to cassettes to CD to complete press a button on a phone and EVERYTHING YOU EVER KNEW OR DIDN'T KNOW.... BOOM FULL ALBUMS WITH A BLUETOOTH WATERPROOF PORTABLE 400 DOLLAR SET OF TEN INCH SUBS KNOCKIN FOR 10 HOURS ON 1 CHARGE AT THE LAKE IN THE MOUNTAINS IN NORTH IDAHO!
ELK AND MOOSE LIKE... HIP HOP? HEAVY METAL? WHATS THIS?
LMFAO
I was thinking you gotta ride it to fully test and sure enough!
That's the only way to truly test them.
You talked about when lift ram would "leak down". If the jack is not leaking oil on the floor and the pump handle is not moving up the problem is the release valve or you have a crack in the housing of the jack. In this case the check valves are fine.
thank u to explain it how to repair very good and show the parts very well
Was wandering if a guy could use dexitron 6 in a pallet jack. I'm a delivery driver. And constantly dealing with cold jacks,Jack's, the detent ball valves to work vary slow. I discovered with my truck plow that dexitron 6 works amazing. Preventing freeze failure .
Sir thank you for the way u explained things.i have a few craftsmen jacks that I can fix now.... ty
Just a kid at heart.
Best video I've seen. No wannabe with terms like "I think" or "maybe" I've had 2 jack failures lately. A floor jack and my engine hoist. The hoist stops lifting when hooked to an engine. It raises about 1/4 inch then drops back down. (it worked great last time I used it 6 months ago) I bought it 2nd hand and don't know who makes it. I think it is harbor freight. Anyway for my education, what causes it to raise and drop like it does?
The holding check ball is just not sealing completely, allowing pressure to move back into the holding tank. Clean the check balls and their sealing surface and you should be good.
@@sixtyfiveford Fixed the problem - thanks!
I had an idea of removing all the valves and check balls on a floor jack and hook it up to a boat ram pump to make it go up and down with 12v. Do you think it’ll work?
That would be neat. Yes, Just take the small pump piston out and tap a fitting. You will need to remove the check ball from the pump side so the fluid can leave back through the hose on the 12v pump.
How do you put a ball in backwards?? It's the same on all sides...
Anon Ymous watch the video. Backwards means the spring is installed on the wrong side of the check ball.
You should never put the ball in from the top and for sure never put the ball in sideways of course you could put the ball in top down but you know what will happen then but the worst thing you can do is putting in your ball crooked
Like the cart ahead of the mule
Thanks for clearing this up! Had to give this a thumbs up
Thanks, I'm glad you liked it.
i would like to see how you rebuild ram style cylinder jacks...the type that hook up to a pump and use either air or an electric motor to pump oil into the rams
I did a video years ago on hydraulic cylinders
ua-cam.com/video/VePM5JqaRH0/v-deo.html
I've seen dozens of these floor jack rebuilds but you've done the best job of describing the check valves, springs and cups. Hats off to you. I have a question. Looking for advice-while I've rebuilt my 3 ton old school Sears , I cannot get the large nut off the old 2 Ton Sears model. I have a large monkey wrench and a long cheater bar. I can about lift the table the vise is clamped to but the nut is not budging. Assuming all the O rings will be replaced anyways, would you advise taking a MAP or Propane torch to it to try to break it loose? Please advise and thanks
Thanks. You can whack the reservoir case while applying tension. If that doesn't work I personally would heat it. You can put wet rags on any critical areas if you're concerned.
Wow.. great example ! I get it now. And thank you for making this video !
Thanks, I'm glad you liked it.
Excellent! Have a floor jack that I need to look at.
Thanks, I'm glad you liked it.
that was a great video! very helpful and I loved the dog ride at the end, cracked me up! two thumbs up!
Glad you enjoyed it!
Great, finally the mystery is removed, touch that bottle-jack and a car will fall on you. The first requirement for a hydraulics mechanic was to be a licensed out-of-work Shaman but now the simplicity has been revealed and no longer will I be screwed out of my hard earned cash.
Thanks Brother
Dude...that was a really well done video. Ive been to automotive trade school and those cats got nothing on you as far as explaining things goes.
Hey Thanks.
BEST tutorial.. great work.
I had no idea how these things work. You really should be a physics teachwe in some university. Thanks for another great video.
Thanks, I'm glad you liked it.
Good to see at the end you use the pallet truck for its primary use… a skateboard.
Frank you'll never believe what that knuckle head next door did today. He was riding a huge scooter down the street with his dog!
Wonderful stuff - where does one look for free, or nearly free, pallet jacks? Have thought about adding a tank of compressed air to make it even easier to use? Or motorizing the main wheel? I have faith that you can make these things even more fun to use, even more more fun than putting together a team of self propelled lawn mowers pulling a home-made chariot.
Thanks for video, can you do a video on how to convert a bottle jack to use air
Yes and no. I've built it in my head a few times over the years. The main issue is you need a completely separate air ram that essentially just pumps the mechanical pump lever. Parts costs are outweighing the cost of buying an already made unit.
sixtyfiveford Yes I seen where a guy modified a air harbor freight jack to work on his press, I just figured you had found a cheaper way to do it
sixtyfiveford here is the link, ua-cam.com/video/bwZ93OJghro/v-deo.html
Great info! Thanks a lot! Do you happen to know why a "rapid pump" floor jack would go up quickly but then require several extra pumps before it starts lifting the car?
I have 3ton Aluminum Jack that will not lift, it have 4screws close to the handle. But I'm sure which two is for bleeding.
Why does this guy look like the one kid from Sid the science kid😂 love your videos by the way!
Explained perfectly......as usual! One of the best channels on UA-cam by far for this type of content.
Thanks Man! I'm glad you liked it.
Enjoyed watching you work on the jacks. I have a floor jack and a bottle type jack on a Harbor Freight lawn mower lift that I need to overhaul but neither one has a name or number on them, that I can find, and HF has no parts nor diagram for their jacks. How would you go about finding parts and a diagram on the internet for these jacks? Thanks
You need to take it apart and measure the bore, rod and seal size. Places like www.theoringstore.com will sell the U cups, seals etc by size.
Best explanation on utube.
Glad it was helpful!
Great walk through!
thanks for the detailed explanation.
I started watching this because I've got an old bottle jack that barely pumps up once it has any pressure on it. I was hoping you were going to show how to fix the little balls on a bottle jack because it looks nothing like your pallet jack
You just need to take them out and clean them.
Great Video, Thanks !
I will chase seal replacement kit to try and repair my motorcycle lift cylinder. Unfortunately cheap lift not sold any longer, and this is the second (replacement) piston facing same internal leak. Will try to clean & lap the seat the way you advise. Thank you!
Good luck. Places like theoringstore.com sell seals by size if you can't find an entire kit.
Awesome video thank you for making it. Them jacks are not cheap
Thanks, I'm glad you liked it.
You can get a two ton floor jack for $24 from advance
Anyone who has ever worked retail and moved products around has ridden one of those pallet jacks like you did in the end.
I have an ATM services biz where the palleted new machines get picked up at freight forwarder/logistics warehouse and driven to job sites. Back when I worked at another company we would ride the pallet jacks, all bat-outta-hell style, out the box of a five-ton straight truck onto an already descending lift-gate then right off onto the pavement. HOLY SKATE OR DIE BATMAN!!!
Although you're a Ford and Dodge guy... 🤔 I still want to thank you for the video! 👍
"Have you driven a Ford lately"? Mines a 70 Falcon wagon. Good video 👍
Thanks, I'm glad you liked it.