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Re: [Shop-talk] 4-post lift hydraulic pump

To: FRED E THOMAS <frede.thomas2@verizon.net>, shop-talk@autox.team.net
Subject: Re: [Shop-talk] 4-post lift hydraulic pump
From: Brad Kahler <brad.kahler@141.com>
Date: Thu, 27 Sep 2007 20:53:13 -0500
Fred,

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 
shaft. 

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.

Brad


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" <brad.kahler@141.com>
> To: <shop-talk@autox.team.net>
> 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
>> cap.
>>
>> 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?
>>
>> Thanks,
>>
>> Brad
>> _______________________________________________
>> frede.thomas2@verizon.net
>>
>> Shop-talk mailing list
>>
>> http://autox.team.net/mailman/listinfo/shop-talk 
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