I definitely filled it FULL when I filled the reservoir. It uses a push
pull cylinder so it uses close to the same amount of oil either
direction. Only real difference would be the volume taken up by the
Its only when I lower it down fast that it pukes some up. Going slow it
works ok. I'll just let it seek its own level and be done with it.
FRED E THOMAS wrote:
> Brad, should be "no" in the reservoir as it is all in the lines
> pushing and holding the lift up, or in mechanics talk, it's out to
> lunch at present, made that mistake way, way back, the the fluid while
> the lift was up and the reservoir was empty, filled it full and almost
> blew the system "FT"
> ----- Original Message ----- From: "Brad Kahler" <firstname.lastname@example.org>
> To: <email@example.com>
> Sent: Wednesday, September 26, 2007 10:16 PM
> Subject: [Shop-talk] 4-post lift hydraulic pump
>> I think I know the answer to this but I'm going to ask anyway.
>> I recently installed a 4-post lift that I bought from our neighbor. Its
>> an older unit that was used in a muffler shop for years. Anyway, the
>> hydraulic reservoir sits horizontal to the big lift cylinder and if the
>> lift is raised up to a reasonable working height, when lowering any
>> faster than a real slow crawl hydraulic fluid spews out of the breather
>> All of the markings on the hydraulic unit are missing so I can't
>> identify a manufacturer and the lift vendor has not been of any help
>> (they been through 3 buyouts since the lift was made).
>> What I'm curious about is how do you determine just how much oil should
>> be in the reservoir? My thought is if there is enough oil in the
>> reservoir for the lift to make it all the way to the top without
>> cavitating then that should be all the fluid you would need.
>> Any thoughts?
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