Subject:
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Re: Pneumatic Cylinders
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Newsgroups:
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lugnet.technic
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Date:
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Sun, 4 Apr 2004 19:17:36 GMT
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Viewed:
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1435 times
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In lugnet.technic, Øyvind Steinnes wrote:
>
> "Martin Bruun" <Citembe@dkmail.zzn.com> wrote in message
> news:HvMyMu.8u9@lugnet.com...
> > In lugnet.technic, Maggie Cambron wrote:
> > > In lugnet.technic, Mark Bellis wrote:
> > > > I've bought quite a few 8455 excavators now and in all of them the pneumatic
> > > > cylinders have restricted air flow due to partially blocked nozzles. The amount
> > > > of restriction varies, as measured by extending and contracting the cylinders by
> > > > hand and feeling the amount of force required to move them quickly.
> > > >
> > > > So far I've used a 1.4mm screwdriver to bore out the nozzles so that air can
> > > > flow faster. You do this at your own risk!
>
> I have succesfully done the same with 4 of the cylinders from the 8455 set.
>
> > I actually got it opened without two much damage. The resistance seems to be
> > caused by too much grease inside the cylinder below the piston. The grease
> > builds up around the bottom inlet and prevents the free airflow. By removing the
> > excess grease I managed to get the cylinder to work as good as any of the other
> > cylinders. I then took one of the other cylinders and without opening it, I
> > tried to make the passage free with a small piece of metal-wire. It actually
> > improved the function to a degree where it no longer has noticeable more
> > resistance than the ok ones.
>
> Has anyone tried to open the cylinders and repair them and then put them
> back together?
>
> Regards
> Øyvind Steinnes
Yes, I have, see above.
It was not easy to get the black cap off, but it can be done without damage to
the parts. Only damage was to one of my fingers, but it fixed itself within a
few days ;-)
Martin
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Message is in Reply To:
 | | Re: Pneumatic Cylinders
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| "Martin Bruun" <Citembe@dkmail.zzn.com> wrote in message news:HvMyMu.8u9@lugnet.com... (...) pneumatic (...) The amount (...) cylinders by (...) air can (...) I have succesfully done the same with 4 of the cylinders from the 8455 set. (...) be (...) (20 years ago, 4-Apr-04, to lugnet.technic)
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