[DeTomaso] Hydraulic jack oil level???

[Will Kooiman]

Yes.  Be careful.

 

The outside of the piston is the reservoir.  When you extend the piston,
fluid goes from the reservoir to the inside cylinder, which is pressurized.

 

If you fill it with the piston extended, and then compress the piston, fluid
overfills the reservoir.  It might pop the plug out and shoot hydraulic
fluid in your face.  Ask me sometime how hydraulic fluid tastes.

 

After I screwed up a couple of times, I searched the internet, and found a
site that explains it pretty well.  http://www.hyjacks.com/H7.HTM

 

You are supposed to compress the piston, pop out the plug that on the side -
not at the base.  Fill it with hydraulic fluid to about the level of the
plug, and then replace the plug.  It's that easy.

 

  _____  

From: Ken Green [mailto:kenn_green at yahoo.com] 
Sent: Sunday, December 27, 2009 8:18 PM
To: detomaso at realbig.com; Will Kooiman
Subject: Re: [DeTomaso] Hydraulic jack oil level???

 


Thanks Will,

 

    I'll make sure the cylinder (piston or ram?) is down when I fill it.  I
assume the pump moves the oil from a cylindrical outer chamber to an inner
cylinder to raise the piston.

 

Ken

--- On Sun, 12/27/09, Will Kooiman <wkooiman at earthlink.net> wrote:


From: Will Kooiman <wkooiman at earthlink.net>
Subject: Re: [DeTomaso] Hydraulic jack oil level???
To: detomaso at realbig.com
Date: Sunday, December 27, 2009, 6:06 PM

Mine worked when new, but when I got it out a year later, I discovered the
fluid had leaked out all over the garage floor.

Mine has the same plug you described.

I think you're supposed to fill it up to the plug, with the cylinder fully
depressed.  If you fill it with the cylinder fully extended, it leaks out
when you depress it.

Also - I think you're supposed to store it with the screw tightened.

The key words are "I think".  Hopefully someone on the list that is smarter
than I, will respond.

That would be just about anyone.

-----Original Message-----
From: detomaso-bounces at realbig.com
<http://us.mc308.mail.yahoo.com/mc/compose?to=detomaso-bounces@realbig.com>
[mailto:detomaso-bounces at realbig.com
<http://us.mc308.mail.yahoo.com/mc/compose?to=detomaso-bounces@realbig.com>
] On
Behalf Of Ken Green
Sent: Sunday, December 27, 2009 7:24 PM
To: detomaso at realbig.com
<http://us.mc308.mail.yahoo.com/mc/compose?to=detomaso@realbig.com> 
Subject: [DeTomaso] Hydraulic jack oil level???

I bought a used engine hoist and when I first tried it, only about half the
pump stroke did anything.  There is a small (about 1/4 inch) rubber plug
about 80% of the way up the body, and I added some jack oil there.  It seems
to work fine now, but I was wondering if typically you fill the jack with
oil up to the plug?
 
Thanks,
 
Ken
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