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Had a similar situation on the hydraullic version only - this may work for you. Lower jack to relieve all pressure and sit on the safety locks. Add some oil and you may get enough to lift it off the stops then lower bike. Just a thought.
(note: I've never seen a bottle jack that uses an "allen wrench" to close/open the valve. Most use the pump handle's "notch" to open and close the valve......).
Either have I and was hoping to find someone with the same pneumatic bottle jack. At this point I am just going to replace it.
I have a pneumatic J & S Jack that is stuck at full height. Although I only used my compressor once to lift the bike when it was new. Just too easy to jack it up by foot. Both stops are in their appropriate highest slots. I raised it up without issue but when I went to let if down the jack would not raise at all. I have had a few issues in the past where it took some extra pumps to get it to raise at first then worked fine.
In the first pic I am assuming the center allen head screw is the release valve. Is this correct? Not typical of the release valves on a non pneumatic bottle jack I have seen anyways. I need to lower the ram to remove the jack and either bleed or replace.
Thanks in advance for your help.
Forgive me if I'm missing something obvious. In your second picture I'm seeing this rod.
Is there a **** on the end of the rod like this?
I could be wrong, but I would think turning the **** counterclockwise would relieve the pressure wether the bottle is foot pump or air assist (pneumatic).
Barneyboy,
Yes you are correct the rod you pointed out is the release. The problem was the jack would not raise the lift high enough to release the mechanical stops All water under the bridge now as I got the bike to the ground.
To my knowledge, J&S never produced a jack that used a LONG rod with **** to open or close the pressure valve. I could be wrong but perhaps a previous owner replaced the original bottle with the one you pictured.
Again, I suggest you either replace the bottle or at least go through the bleed procedure I referenced in my previous post.
Mechanical stuff seldom "fixes itself"....meaning that the next time you might NOT be able to get it off the safety stops....then what would you do? Bleed, add oil if needed or replace the bottle, is still my suggestion. Good luck.
Add some jack oil and bleed the jack. It's not hard to do. It's just running out of fluid at its highest position. When you left it for a bit and came back, just enough fluid had drained off the reservoir walls to get the jack up a bit higher.
To my knowledge, J&S never produced a jack that used a LONG rod with **** to open or close the pressure valve. I could be wrong but perhaps a previous owner replaced the original bottle with the one you pictured.
Again, I suggest you either replace the bottle or at least go through the bleed procedure I referenced in my previous post.
Mechanical stuff seldom "fixes itself"....meaning that the next time you might NOT be able to get it off the safety stops....then what would you do? Bleed, add oil if needed or replace the bottle, is still my suggestion. Good luck.
I am the original owner of the jack purchased it in 2019 and it came this long rod release. Works great and saves the back a little. In post #23 you will see a picture of mine and below it a non pneumatic version with the same long rod release.
Tim......just curious, what's the serial number stamped on the plate affixed to the jacks left wheel cover?
( I followed J&S for many yrs until their demise. Mine was bought new, in person at a cycle show from the company's owner Steve Rovers and his son. But to my knowledge, in 2016 and afterwards there were no "extension" rods with *****) incorporated in any of their (J&S's) designs or ever displayed historically on their website.
Your serial number would help......and I'd be curious to see how the rod connects to the release valve of the bottle jack. thx.
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