Your issue just solved a problem I've had forever on a kendon motorcycle lift. The jack would go up so far, loose stoke then eventually stop going higher. Air was getting into the system and I kept thinking it wasn't enough fluid. Over filling didn't help. Part of the problem is that the jack arm is actuated by a rod and as the lift goes up, the angle between the rod and the jack becomes less parallel. The rod pushes the arm at an angle. The increased angle cased the O ring to suck air on the rod. Installing a new slightly larger O ring fixed the problem..
Dear Sir, I have a similar problem with a trailer crane where it just doesn’t pump. It came to me completely dry of oil and had been sitting around a workshop unused for several years. Hopefully the replacement of the O-ring on the piston rod will do the trick. It makes sense to me but we will see. Firstly I am off to buy one of those neat hook tools for removing O-rings and we will see. It it works, I will be very grateful. Cheers. LATE ADDITION: Its five hours later and with hook tools in hand I replaced the O-ring. No difference. I then pulled apart the piston housing and found a little metal device with two holes, springs in each hole and two ball bearings - one pointing upwards and the other downwards. These were obviously the gate valves for the pumping and filling cycles of the piston mechanism. I poked around with the ball bearings and they seemed to be free-er in movement. Drained the oil for good measure. Put everything back together and partially filled. WORKED - YIPEE! Filled with oil and STOPPED WORKING. Blast! I’m not going to let this beast beat me. I’m going to drain the cylinder of air {as per other RUclipss}. This did something. Try again - IT WORKED. Pumped it all the way to the heavens and waiting to see if it leaks overnight. So far so good. Thank you to the twenty plus RUclips’rs who contributed to my rapid accretion of knowledge this week culminating in a complete novice effecting a repair on a non-functional crane jack.
I have a similar jack with the exact same problem, I have replaced the cup seal and it pumps up but fills with air, From your video I realise that the second seal needs replacing, thanks for your video
my trolley jack suddenly stopped working..took it apart 3 times trying to fix it., then i found ur video and the trick worked.. thanks man, sending my regards from the philippines..
Thanks for the great video. I picked up a 8-ton jack thrift store purchase for 10 bucks, box was oily and the Jack was empty. After filling with oil I could not Purge all the air out, it kept coming back. Looking for a new o-ring.
That Jack looked just like a Michelin jack I've kept for about 20 years with the same problem. I got another 1 back then to keep things moving. I'll try that out. Thanks
Great video thank you. Troubleshooting my 20 Ton bottle jack which when under load the pump handle raises up from the bottom position to the top as if air/oil is flowing backwards. Tried all the tricks to bleed it, suspect it could be something like this Oring seal. Any thoughts on what may cause this problem?
I think you are right, it's got to be a seal. It's got to be in the check valve to the pump. Try taking it apart, clean everything and replace any worn o-rings and it should work.
I am a hydraulic jack technician. Air is contained in the cylinder. Raise the ram to the highest position once. Next, loosen the release and lower it to the lowest position. Add oil until oil tank hole position. If you do this twice, it will be normal.
I’ve got a 20 ton jack that won’t pump up .... cylinder is fully compressed The pump is good. I’ve bled it even drained it completely.... refilled it. Left the bleeder valve out....and pumped it. Fluid will shoot out of the bleeder hole. But the cylinder will not raise........ jack was free. Since I have a couple trucks that weight 6 tons and close to 10 tons I figured it would be a nice thing to have.......
Sounds like the valve that you turn to let it down is not closing. If you screw it all the way out there is usually a small ball bearing in there that actually makes the seal. I bet someone lost that ball and it is no longer sealing when you screw it closed. Good luck!
Hi I came a cross your video, maybe you seen this problem before, I have a motorcycle/atv lift, small one rolls under bike. That jack has a side spring on it that helps I guess for lower Jack. It has a foot pump and and a foot release to lower. I filled up with oil, now I try to bleed, no matter how I try to push in on release, so I can pump without jack going up to bleed. That jack keeps pumping up. Then when it's up it keeps creeping down I guess with the help of that side spring. I tried pumping it up half way flipping it upside down pushing down on it, then flip it back over, and then purging air out of rubber grommet on side of Jack, got a little air out. But what I ever I do to bleed it keeps creeping down with no load on it. Just the side spring. Please help if you can, thank you
I would guess the valve is stuck. You might try backing out the valve that you turn to let it down and see if it's rusted or stuck closed. It should go down if that's free and the ram is clean.
@@SoatMon The ram is kind of rusty. I'm going to take it all apart and rebuild it. I have an O-ring kit. It was a 50$ ebay purchase. Seller said it worked, surprise he lied. 15$ and 35 with shipping and taxes. Kinda mad, but I need an extra 20t for a breakdown kit for one of our AFVs.
@@SoatMon thank you for your response. I really, really appreciate it. I am not a mechanic but I have a basic understanding of hydraulics and how they work along with mechanical theory.
I just bought a hydraulic jack for hubby read instructions operated it to raise up openedrelease valve some oil came out now won't come down fees he hasn't seen it yet would like to know how to fix please
When you activate the release valve you don't remove it, you just turn it about a half turn counter clockwise, then back in to lock it. Try screwing it all the way in, then back it out a half turn and press down on the ram (top of it) and it should go down.
hi SOAT I THINK YOU CAN HELP ME. FEW MONTHS AGO I BOUGHT A NEW JACK. I ASKED MY SON TO LOWER IT AND HE UNSCREWED IT TO AN EXTEND THAT THE FLUID COME OUT. I THEN TRIED TO REFILL IT AND IT NEVER CAME BACK TO LIFE. AND THEN YERSTERDAY I BOUGHT NEW 20 TON JACK. AND MY ASSISTAND DIDTHE SAME. THAT IT HOW I STARTED SERCHING ABOUT JACKS ON INTERNET. THIS IS WHAT I TRIED TO DO : I UNSCREWED IT(THAT LITTLE SCREW WE USE TO LOOSEN WHEN WE WANT TO LOWER THE JACK) COMPLETELY AS THE JACK WAS ALREADY NOT WORKING.I THEN TRIED TO FILL OIL THROUGH THAT HOLE. NOTHING CAME RIGHT. I TRIED SECOND METHOD OF OPENING A PLUG THAT IS RUBBER ON THE JACK AND FILL IT WITH OIL AND IF I PUT MY FINGER ON THAT HOLE AND TRY TO PUSH ``RAM `` DOWN THE PRESSURE RISES ON MY FINGER. AND WHEN I TRY TO JACK IT UP IT DOES NOT. EISH TRY HELP ME
I wonder if you lost part of the valve when it was screwed all the way out ba lot of times there is a little ball that can fall out and if it does it won't close and won't raise.
Хобби
Yes! You just helped me by not having to toss mine plus saved me from having to buy a new one!! Big ups!! Thanks.
Thank you for the good tips. I’ve replaced the pump seal and now my 20 ton jack can be used again.
Awesome! Thanks for letting me know!
Thank you! Watched your video and fixed a combination bottle jack/jack stand that spent the last year as a black widow apartment complex.
Awesome, thanks for letting me know!
Replaced the O-ring and it fixed my jack. Thanks!😀
Awesome, glad it helped!
Thank you for posting this video. I was at a loss on how to get mine back to working.
You're welcome. Thanks for letting me know it helped you.
Your issue just solved a problem I've had forever on a kendon motorcycle lift. The jack would go up so far, loose stoke then eventually stop going higher. Air was getting into the system and I kept thinking it wasn't enough fluid. Over filling didn't help. Part of the problem is that the jack arm is actuated by a rod and as the lift goes up, the angle between the rod and the jack becomes less parallel. The rod pushes the arm at an angle. The increased angle cased the O ring to suck air on the rod. Installing a new slightly larger O ring fixed the problem..
Awesome, glad it helped. Thank you for taking the time to let me know.
Dear Sir, I have a similar problem with a trailer crane where it just doesn’t pump. It came to me completely dry of oil and had been sitting around a workshop unused for several years. Hopefully the replacement of the O-ring on the piston rod will do the trick. It makes sense to me but we will see. Firstly I am off to buy one of those neat hook tools for removing O-rings and we will see. It it works, I will be very grateful. Cheers.
LATE ADDITION:
Its five hours later and with hook tools in hand I replaced the O-ring. No difference. I then pulled apart the piston housing and found a little metal device with two holes, springs in each hole and two ball bearings - one pointing upwards and the other downwards. These were obviously the gate valves for the pumping and filling cycles of the piston mechanism. I poked around with the ball bearings and they seemed to be free-er in movement. Drained the oil for good measure. Put everything back together and partially filled. WORKED - YIPEE! Filled with oil and STOPPED WORKING. Blast!
I’m not going to let this beast beat me. I’m going to drain the cylinder of air {as per other RUclipss}. This did something.
Try again - IT WORKED. Pumped it all the way to the heavens and waiting to see if it leaks overnight. So far so good.
Thank you to the twenty plus RUclips’rs who contributed to my rapid accretion of knowledge this week culminating in a complete novice effecting a repair on a non-functional crane jack.
I've got same jack, same problem. Fudge I will fix it now. Thanks a bundle.Also good camera work.
I hope it worked out for you!
Still a hard to find video/info about! Helped me out tremendously today 👍. Thank you
Awesome!! Thanks for letting me know!
Always nice to rescue a good tool from the scrap bin.
Yes it is!
Great success, you just like playing around in hydraulic oil. :-) Hope you are having a good weekend.
I have a similar jack with the exact same problem, I have replaced the cup seal and it pumps up but fills with air, From your video I realise that the second seal needs replacing, thanks for your video
You're welcome, thank you for letting me know it was helpful.
That's exactly what my jack is doing. I'm gonna have at it with a mean wrench! Thanks for showing how.
Great. Good luck with your repair!
my trolley jack suddenly stopped working..took it apart 3 times trying to fix it., then i found ur video and the trick worked.. thanks man, sending my regards from the philippines..
Glad it helped!!
Most of the time it's the nut behind the pump. Thanks for the video.
Thanks for the great video. I picked up a 8-ton jack thrift store purchase for 10 bucks, box was oily and the Jack was empty. After filling with oil I could not Purge all the air out, it kept coming back. Looking for a new o-ring.
You're welcome! I hope you get it fixed.
That Jack looked just like a Michelin jack I've kept for about 20 years with the same problem. I got another 1 back then to keep things moving. I'll try that out. Thanks
Probably the same jack. I bought it at Sam's about that long ago.
Great video ! Never thought of that trick . I'll have to try it.
Thanks!
replaced a #7 o-ring on my 30yr old transmission jack, was able to get it to pump up, and hold. like it's supposed to! thanks!
You're welcome. Glad it helped. Thanks for letting me know!
Very educational. If one stores a bottle jack on its side does it damage it? Irreparably?
That's really cool. Thanks for the help.
You're welcome!
Great video thank you. Troubleshooting my 20 Ton bottle jack which when under load the pump handle raises up from the bottom position to the top as if air/oil is flowing backwards. Tried all the tricks to bleed it, suspect it could be something like this Oring seal. Any thoughts on what may cause this problem?
I think you are right, it's got to be a seal. It's got to be in the check valve to the pump. Try taking it apart, clean everything and replace any worn o-rings and it should work.
I have the same 20-ton jack, my son let all the fluid out, now i know how to fix it. Thanks
Hope you got it going!
Your jack looks exactly like mine (20 ton Michelin) Mine is doing exactly the same thing. Most likely the same problem. Thanx!!!
You're welcome!
I am a hydraulic jack technician.
Air is contained in the cylinder.
Raise the ram to the highest position once.
Next, loosen the release and lower it to the lowest position.
Add oil until oil tank hole position.
If you do this twice, it will be normal.
how can u raise the ram when it will not jack thats the problem
My jack won't lower
I have the bottle jack but need to replace the relief valve oring on the bottom. Do you know where to get one and part number?
My pump is very sloppy loose so i bet its the o-ring. Thanks, I tried everything else. Tomorrow I'll take the valve apart. Well done video. 4:18
Thanks! I hope you get it fixed.
Gr8 job ..love to see the fix..
Thanks!
Thanks for doing this vid! It might just help me too
You're welcome. Hope it helps!
Thank you Sir excellent work appreciated.
Glad it was helpful!
Useful video. Thnkx a million
Your welcome. Thanks for letting me know it helped you.
So as best I can tell, even though an o ring might look okay, in this case it was causing the problem?
They usually will be deformed in some way or hard if they are causing the problem.
Good work! 😄👍👍
Thanks!
Great video
Thanks!
Thank you, useful.
You're welcome!
great fix man !
Thanks Shawn!
I have the same one but I need to rebuild. Where do I buy the rebuild kit? Thanks
I’ve got a 20 ton jack that won’t pump up .... cylinder is fully compressed
The pump is good. I’ve bled it even drained it completely.... refilled it. Left the bleeder valve out....and pumped it. Fluid will shoot out of the bleeder hole. But the cylinder will not raise........ jack was free. Since I have a couple trucks that weight 6 tons and close to 10 tons I figured it would be a nice thing to have.......
Sounds like the valve that you turn to let it down is not closing. If you screw it all the way out there is usually a small ball bearing in there that actually makes the seal. I bet someone lost that ball and it is no longer sealing when you screw it closed. Good luck!
Just found your channel.
Welcome! Thanks for coming by. :)
Helped me thanks!
Glad it helped!
Thanks for the information
You're welcome!
Hi I came a cross your video, maybe you seen this problem before, I have a motorcycle/atv lift, small one rolls under bike. That jack has a side spring on it that helps I guess for lower Jack. It has a foot pump and and a foot release to lower. I filled up with oil, now I try to bleed, no matter how I try to push in on release, so I can pump without jack going up to bleed. That jack keeps pumping up. Then when it's up it keeps creeping down I guess with the help of that side spring. I tried pumping it up half way flipping it upside down pushing down on it, then flip it back over, and then purging air out of rubber grommet on side of Jack, got a little air out. But what I ever I do to bleed it keeps creeping down with no load on it. Just the side spring. Please help if you can, thank you
Yep, had to do the same thing mine, same brand as well.
Thanks for letting me know!
Thanks. Maybe that is my problem.
Hope it helps!
Yes!!!!! Thank you, was about to toss mine also.
You're welcome!!
Thank you sir for the tip. I have an engine Crane that is doing the same thing and I thought that maybe the issue and I'm sure it is
I hope your repair went well!
@@SoatMon it did. Worked like a charm
I have a jack that is actually stuck open. What do you think? It won't go down and is about halfway up with the ram.
I would guess the valve is stuck. You might try backing out the valve that you turn to let it down and see if it's rusted or stuck closed. It should go down if that's free and the ram is clean.
@@SoatMon The ram is kind of rusty. I'm going to take it all apart and rebuild it. I have an O-ring kit. It was a 50$ ebay purchase. Seller said it worked, surprise he lied. 15$ and 35 with shipping and taxes. Kinda mad, but I need an extra 20t for a breakdown kit for one of our AFVs.
@@SoatMon thank you for your response. I really, really appreciate it. I am not a mechanic but I have a basic understanding of hydraulics and how they work along with mechanical theory.
Bravissimo!
Thanks!
I just bought a hydraulic jack for hubby read instructions operated it to raise up openedrelease valve some oil came out now won't come down fees he hasn't seen it yet would like to know how to fix please
When you activate the release valve you don't remove it, you just turn it about a half turn counter clockwise, then back in to lock it. Try screwing it all the way in, then back it out a half turn and press down on the ram (top of it) and it should go down.
شكرآ احسنت
stupid question, do I have to use hydraulic oil in one of these or what happens if I put 15w40 in it?
I have only used hydraulic oil, I'm not sure what the effect would be.
Thanks mate ....... sharing is caring
My pleasure
Thank u
You're welcome!
Awesome!
Thanks!
use the hydraulic pump to inject the air in tyre so we can easily repair car punctured tire, no need for any gadbad
I have hydraulic jack..
Plz tell me market in available jack oil name
---------------------
Look in the description for this video it links you to the correct oil.
You are the Man¡¡
Thanks!!
Can I use ATF to fill it?
I don't really know, I always use hydraulic oil. There is some listed in the description of the video if you are interested what kind it is.
In my case the the lifter got stuck it's not all working!
hi SOAT I THINK YOU CAN HELP ME. FEW MONTHS AGO I BOUGHT A NEW JACK. I ASKED MY SON TO LOWER IT AND HE UNSCREWED IT TO AN EXTEND THAT THE FLUID COME OUT. I THEN TRIED TO REFILL IT AND IT NEVER CAME BACK TO LIFE.
AND THEN YERSTERDAY I BOUGHT NEW 20 TON JACK. AND MY ASSISTAND DIDTHE SAME. THAT IT HOW I STARTED SERCHING ABOUT JACKS ON INTERNET.
THIS IS WHAT I TRIED TO DO : I UNSCREWED IT(THAT LITTLE SCREW WE USE TO LOOSEN WHEN WE WANT TO LOWER THE JACK) COMPLETELY AS THE JACK WAS ALREADY NOT WORKING.I THEN TRIED TO FILL OIL THROUGH THAT HOLE. NOTHING CAME RIGHT.
I TRIED SECOND METHOD OF OPENING A PLUG THAT IS RUBBER ON THE JACK AND FILL IT WITH OIL AND IF I PUT MY FINGER ON THAT HOLE AND TRY TO PUSH ``RAM `` DOWN THE PRESSURE RISES ON MY FINGER. AND WHEN I TRY TO JACK IT UP IT DOES NOT.
EISH
TRY HELP ME
I wonder if you lost part of the valve when it was screwed all the way out ba lot of times there is a little ball that can fall out and if it does it won't close and won't raise.
@@SoatMon haaa indeed. i bought a metal marble and put it in and it works fine .thanks a lot
if it automatically loosing it's pressure then it becomes a pumping device for air tank and filling up the tire😝😝
Eso no es componer un gato hidraulico nada,que ver
God
but still not pumping big strokes! does not look right!
That pump is going too easy. And your pumping it way too fast. Give the oil time to refill.
And always have the jack in a tub when disassembling.....🤣