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Bottle Jack Primer

08/19/2009 10:43 PM

I need someone to give me a quick rundown on the lowly bottle jack...

We have a piano dolly that uses three bottle jacks to do the lifting. One of these jacks seems to have blown it's seal.

I've never torn down or rebuilt a bottle jack so I have no idea what I may be getting into. I checked the manufacturer website, their big advice is 'send it to us' and I'll be damned if I'm gonna pay shipping for 20 lbs of bottle jack two ways on top of parts and labor.... clearly a new one would be cheaper.

Long story short I need to try and re-furb. this jack.

For those of you that are still interested in the long story here's more info.

The bottle jack in question is an Omega 10065C 6-ton hydraulic hand jack. The manufacturer's (Shinn Fu) website (http://www.shinnfu.com/) is useless, the owner's manual is useless... the jack was modified by the dolly manufacturer (they welded a washer onto the release valve to use like a thumb screw, they provided a modified padded handle and attached a Colson 6901 bumper to the top of the saddle to provide a larger/softer contact surface between the jack and the piano.

We purchased a new Craftsman 6-ton bottle jack as a quick fix but:

  • the bolt holes don't line up (shocking...) and re-drilling and tapping is problematic (not impossible, just a last resort) we've got it clamped on at the moment but this is obviously a poor and temporary fix.
  • if we can't repair the old jack we need to find a way to move the pad on top of the saddle of the old one to the new one which has no bolt hole to receive it. I for one am not thrilled at the prospect of trying to drill a 3/16" - 5/16" hole into a one inch diameter threaded piece of hardened steel with a heavily textured surface, especially since we don't have a drill press handy... and then of course we would still need to tap the hole... the hardened steel hole... by hand...

Basically I just want to get a comforting voice telling me it'll be ok before I crack this thing open and discover that there is some bizarre alien technology in bottle jacks that is going to transform me into a flesh eating zombie leading ultimately to the untimely demise of life on earth... And I will gladly also accept such mundane advice as 'empty the fluid before you begin' or 'don't drink the hydraulic fluid'

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Pathfinder Tags: blown seal bottle jack refurbish
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#1

Re: Bottle Jack Primer

08/19/2009 11:30 PM

awesome, thank you guest... whomever you may be...

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#6
In reply to #1

Re: Bottle Jack Primer

08/20/2009 11:52 PM

Pleasure - not sure why not logged on - old age maybe?

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#2

Re: Bottle Jack Primer

08/20/2009 5:12 AM

Why not just buy a replacement jack of the same make ....then rebuild / exchange parts between the two?

http://www.heinwernerjacks.com/product/10065C seems to me like a cheap option.

Regards Woody

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#4
In reply to #2

Re: Bottle Jack Primer

08/20/2009 8:05 PM

I voted for GA just because I think this comment got to the point: For $24,00, it's not worth even the time posting the thread...

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#11
In reply to #2

Re: Bottle Jack Primer

08/26/2009 11:50 AM

As I've discovered, not all bottle jacks are the same... we did buy a new one, and the bolt holes don't line up...

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#15
In reply to #11

Re: Bottle Jack Primer

08/26/2009 2:28 PM

"As I've discovered, not all bottle jacks are the same... we did buy a new one, and the bolt holes don't line up..."

That's why I linked to the SAME MAKE and MODEL as your original jack ...rather than a off the shelf replacement from your local Wal-Mart.

I'll copy and paste the content of the link.......

Omega 10065C - 6 Ton Capacity Side Pump Bottle Jack has machined and polished cylinders with die-cut threads which provide a non-abrasive leak-free, durable performance. The hydraulic system is protected from internal damage by a patented by-pass mechanism. It is fabricated from hard-cast steel with heat-treated critical stress areas. The unique cross-type forged release valve assures positive load control and the wide, rugged base provides stability and strength.

price $24.55

Further down the thread you say the ball bearing is missing ...by all means try one that you think might do the job.

Regards Woody

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#16
In reply to #15

Re: Bottle Jack Primer

08/26/2009 5:36 PM

I see... thank you for that, and for the clarification... I'm just back from having my wisdom teeth out so I'm still re-calibrating my brain...

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#3

Re: Bottle Jack Primer

08/20/2009 1:11 PM

Before the point of no return is reached what evidence is there to decide a seal has failed?

The hard textured end of the new jack ram usually can be unscrewed from a tapped hole, have you tried to unscrew this accessory cap?

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#12
In reply to #3

Re: Bottle Jack Primer

08/26/2009 11:54 AM

tried unscrewing the 'end' of the new jack with no success, didn't want to risk breaking it or myself so didn't give 100% effort for lack of knowledge... will try harder...

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#5

Re: Bottle Jack Primer

08/20/2009 10:55 PM

Simple task! Remove your attachment from the end of the ram and then unscrew the big hex nut on the top of the bottle that surrounds the ram. Lift out the ram and them determine the worn parts needed to repair the jack. If in doubt take your parts (all of them) to any local hydraulics supply shop and they will match them up for you. Most will even have the bench repair people on site and will do the job for you while you wait.

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#7

Re: Bottle Jack Primer

08/21/2009 2:36 AM

Hi.

When you say that the jack 'seems to have blown its seal'. I assume that you mean that the ram will not go up when you pump it using the handle. I personally do not think the seals have gone bad in this almost new like jack, they are made of polyurethane plastic u-cups, not cow-leather like they were used in the old days, and the oil used is very stable.

I think the jack may be "air bound" (vapor locked). Remove the rubber plug from the side of the jack, air wooosh. Open the valve a little and push the ram all the way down. Pump it with valve still open. Then close valve and see if it goes up.

or if by accident someone removed the release valve and unknowing lost the ball in the seat. See drawing others posted.

At any rate the parts specific for your dolly can easily be removed, and placed on the same exact new jack.

If you do decide to exchange this jack i suggest that you take them off, you wont get them back.

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#14
In reply to #7

Re: Bottle Jack Primer

08/26/2009 12:08 PM

The symptom that led me to think 'broken seal' is that the ram sinks back down when you stop pumping...

'or if by accident someone removed the release valve and unknowing lost the ball in the seat.'

Ball??? I think we may be on to something here with this ball theory... Especially since there is no ball in this jack... If I can't find it laying on the floor where my 'helpers' clearly didn't do anything wrong (what the the big mess of hydraulic fluid on the floor) would it be reasonable to just go get a ball bearing of the same diameter as the end of the release valve screw and slap it in there?

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#17
In reply to #7

Re: Bottle Jack Primer

08/27/2009 12:10 PM

Thank you guest, your insight has saved me a good deal of unnecessary running around. I went and checked the floor in our piano storage room and lo... there before me was a shining orb of diminutive stature... once I dropped the ball in the hole (and put the jack back together) the jack started working like it's supposed to... amazing...

It seems one of our over-hires pulled the screw out (I'll assume unintentionally), didn't notice the little ball go shooting out, put the screw back in and didn't tell anyone... gotta love new guys...

My only regret is that you didn't log in so that you can receive the well deserved GA on your profile.

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#18
In reply to #17

Re: Bottle Jack Primer

08/28/2009 11:26 PM

Good I glad it worked out allright. by the way that comment was mine, and i just signed up here today.

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#19
In reply to #18

Re: Bottle Jack Primer

08/29/2009 3:42 PM

Welcome to CR4, I can tell already you're gonna fit right in!

I'm giving your post a GA for the GA you gave me before you signed up, hopefully some other folks will add their GA's as well, you deserve it.

Thank you again, my boss thinks I'm a genius now.

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#8

Re: Bottle Jack Primer

08/21/2009 10:12 AM

I personally would buy two more Craftsman jacks and make three steel adapter plates to be used between the jack base and the frame. Bolt the jacks to the adapter plates and the plates to the frame, then mount the soft coasters on the top. If you need to repair the jacks in the future, you will be able to find the parts you need. (You may have to rotate the jacks 45 degrees to keep the bolt holes for the frame and jack from intersecting.)

Either that, or use duct tape!

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#9
In reply to #8

Re: Bottle Jack Primer

08/21/2009 10:51 AM

Some acrylic adhesive may be a better suggestion, removal is quick with a little heat too.

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#10

Re: Bottle Jack Primer

08/21/2009 11:09 AM

Six tons seems a lot for lifting a piano. Three one ton jacks would be enough. Just wondering.

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#13
In reply to #10

Re: Bottle Jack Primer

08/26/2009 12:00 PM

I don't know why they used 6-ton, our large piano is a Steinway D...I doubt it's the biggest piano out there, but they don't come much bigger to my knowledge, and it weighs in at less than 1000lbs...

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