[AT] Hydraulic Cylinder problems again - Help?

[Larry Voris]

DEAN:
----- Original Message -----
From: "Dean VP" <deanvp at att.net>
To: <at at lists.antique-tractor.com>
Sent: Monday, February 23, 2004 9:04 PM
Subject: [AT] Hydraulic Cylinder problems again - Help?


> I have a Hydraulic Cylinder (Jack) on my 20' tilt trailer that has decided
> to act up again. I had this problem before and with help from the list
> members, I was able to get it going again by heavily lubricating the small
> piston on the manual pump. The problem is that it quits working before the
> cylinder is fully extended, (trailer deck fully tilted).  I think my band
> aid fix in the past may have just masked what the real problem is. But I'm
> not sure what it is. I do know inadequate fluid is not the problem.

Always use a light hydraulic fluid in jacks.  DO NOT USE BRAKE FLUID
It does sound like it is low on fluid.  What brand is the jack?
When you lubricated the small pistion would indicate that the
cup on the small piston is probably bad.  If it is a jack made in
china it will have a metric cup. Probably 12MM. Under the pump
cylinder is a valve body.  It contains the 2 ball. Suction and Pressure.
Clean this valve body.  Don't get it upside down when you put it back.
It probably has water in it.  If you have a digital camera, take a picture
and e-mail it to me. lvoris at vorishyd.com
Larry Voris

> I noticed that HF is selling cylinders that look a lot like this one and
I'm
> wondering if it might be just better to replace the one I have with a new
> one, might be less expensive than getting it repaired,  or what is the
real
> problem I'm dealing with!  I think it has something to do with the seal on
> the small hand pump piston but haven't figured out how to fix it. Help?
>
> This problem always seems to get worse when I haven't used the trailer
> (hydraulic jack) for a long period. Is something drying out? A leather or
> seal needs to be replaced? Or?  I don't quite understand why it works but
> not all the way if it's just the small piston seal. I'm stuck.
>
> Dean A. Van Peursem
> Snohomish, WA 98290
>
> CRS = Having a Photographic Memory but a shortage of unused film.
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