[MBZ] 560 SEL -- now hyd cylinder

2010-12-24 Thread MG
I didn't trigger on this till just now. I repaired an old Sears 
floor jack a couple of years ago. It was very easy. The only 
problem was finding the rubber parts for it. Look for a place 
that repairs the big hydraulic jacks in repair shops. I found one 
in Jacksonville. Take the parts to them and they hand you the 
right new ones.
I can't really remember now but I seem to recall that there was a 
big rubber thing on the bottom of the ram and a seal type where 
it ran in and out. May have also been a smaller seal at the 
valve. The rest was little springs and balls in the valve system. 
A pain to refill with oil but it has worked like new since then. 
I also seem the remember doing a bench top press with hose 
connected remote hand pump at one time in the past. Just a quick 
and dirty job at the time. Replaced the seals at the top of the 
ram and left the rest. It still works when I need it.


Manfred



Date: Thu, 23 Dec 2010 01:36:44 -0800
From: Jim Cathey 
To: Mercedes Discussion List 
Subject: Re: [MBZ] 560 SEL -- now hyd cylinder


> I have a really old hydraulic floor jack with a leaky 
cylinder, have
> thought for some time to try to rehabilitate it.  Are those 
similarly

> arranged?

I think they can be repaired, but I've never done one.

-- Jim



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Re: [MBZ] 560 SEL -- now hyd cylinder

2010-12-23 Thread Dieselhead

Yes, that is why leather can work in such a situation



On Thu, 23 Dec 2010 07:41:43 -0600 Dieselhead <126die...@gmail.com> wrote:


 I have worked on hyd cylinders that are in the range of 100 years old,
 but still perform regular duty made with leather cups.  The leather
 cups are available. The cylinders run and work ok at 2000 psi.  One I
 saw being operated at 2750 psi on an 8" cylinder.  that is 16 pi x 2750
 or 70 tons on a piece of leather.


But the leather is most surely in compression between the hydraulic fluid
and steel cylinder walls and a steel piston attached to the cylinder's
rod, with only a small part exposed to the gap it's sealing.


Craig

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Re: [MBZ] 560 SEL -- now hyd cylinder

2010-12-23 Thread Craig
On Thu, 23 Dec 2010 07:41:43 -0600 Dieselhead <126die...@gmail.com> wrote:

> I have worked on hyd cylinders that are in the range of 100 years old,
> but still perform regular duty made with leather cups.  The leather
> cups are available. The cylinders run and work ok at 2000 psi.  One I
> saw being operated at 2750 psi on an 8" cylinder.  that is 16 pi x 2750
> or 70 tons on a piece of leather.

But the leather is most surely in compression between the hydraulic fluid
and steel cylinder walls and a steel piston attached to the cylinder's
rod, with only a small part exposed to the gap it's sealing.


Craig

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Re: [MBZ] 560 SEL -- now hyd cylinder

2010-12-23 Thread Dieselhead
Rebuild depends on design and availability of parts.  If the seals 
are all orings, you are in luck as long as metal parts are not worn 
badly.  I think some jack pumps use a cup in the pump, and it may be 
hard to find replacement cups.


I have worked on hyd cylinders that are in the range of 100 years 
old, but still perform regular duty made with leather cups.  The 
leather cups are available. The cylinders run and work ok at 2000 
psi.  One I saw being operated at 2750 psi on an 8" cylinder.  that 
is 16 pi x 2750 or 70 tons on a piece of leather.



I have a really old hydraulic floor jack with a leaky cylinder, 
have thought for some time to try to rehabilitate it.  Are those 
similarly arranged?


I think they can be repaired, but I've never done one.

-- Jim



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Re: [MBZ] 560 SEL -- now hyd cylinder

2010-12-23 Thread Jim Cathey
I have a really old hydraulic floor jack with a leaky cylinder, have 
thought for some time to try to rehabilitate it.  Are those similarly 
arranged?


I think they can be repaired, but I've never done one.

-- Jim



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Re: [MBZ] 560 SEL -- now hyd cylinder

2010-12-22 Thread Mitch Haley

Rich Thomas wrote:
I have a really old hydraulic floor jack with a leaky cylinder, have 
thought for some time to try to rehabilitate it.  Are those similarly 
arranged?  Parts available?  Or should I take it off and take it to a 
shop and have them deal with it?


Hydraulic cylinders are usually held together with a screw on cap.
Always fun finding a way to apply huge torque to the cylinder body (and the cap, 
if the cap isn't a hex head). I took my grandfather's (1975-1980 vintage) small 
floor jack to a shop about 20 years ago, and they told me it wasn't fixable. I 
never threw it away, intend to tear it apart some day but never have.


Mitch.

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Re: [MBZ] 560 SEL -- now hyd cylinder

2010-12-22 Thread Max Dillon
Have one of those dead floor jacks also, I have to say that I've lost 
confidence 
in the thing at this point and I'm not sure I'd want myself or anyone else to 
use it.

-Max





From: Rich Thomas 
To: Mercedes Discussion List 
Sent: Wed, December 22, 2010 10:05:47 AM
Subject: Re: [MBZ] 560 SEL -- now hyd cylinder

I have a really old hydraulic floor jack with a leaky cylinder, have 
thought for some time to try to rehabilitate it.  Are those similarly 
arranged?  Parts available?  Or should I take it off and take it to a 
shop and have them deal with it?

--R

On 12/22/2010 9:37 AM, Jim Cathey wrote:
>> The 87 TD struts are different and I have been told by several 
>> different authoritative sources that they are not rebuildable.
>
> Did you see:
>
> http://bmwe32.masscom.net/gavin/LAD_strut_rebuild.htm
>
> Does that crimped-on cap look anything like your strut?
> Mine doesn't have that.
>
> -- Jim
>
>
>
> ___
> http://www.okiebenz.com
> For new and used parts go to www.okiebenz.com
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>
> To Unsubscribe or change delivery options go to:
> http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
>

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Re: [MBZ] 560 SEL -- now hyd cylinder

2010-12-22 Thread Rich Thomas
I have a really old hydraulic floor jack with a leaky cylinder, have 
thought for some time to try to rehabilitate it.  Are those similarly 
arranged?  Parts available?  Or should I take it off and take it to a 
shop and have them deal with it?


--R

On 12/22/2010 9:37 AM, Jim Cathey wrote:
The 87 TD struts are different and I have been told by several 
different authoritative sources that they are not rebuildable.


Did you see:

http://bmwe32.masscom.net/gavin/LAD_strut_rebuild.htm

Does that crimped-on cap look anything like your strut?
Mine doesn't have that.

-- Jim



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