[TheForge] hydraulic pump

Thu Mar 20 21:59:07 2003

Find a place selling logsplitters or supplies to make one.

Steve Smith

Shannell Sugrue wrote:
> Gee you have some amazing prices there, I just rang around here in Australia
> and a 5hp 2500/700psi 8/4gal per minute would cost me $1200 thats $700 USD
> then I need a coupling, bellhousing etc, another place suggested using 2
> pumps one high flow one high pressure and a hi low valve to shut one out
> when the pressure rises, this was more like $900 Aust. Where are the cheap
> pumps :)!!
> 
> 
> ----- Original Message -----
> From: "Ed F" <[email protected]>
> To: <[email protected]>
> Sent: 19 March, 2003 1:51 PM
> Subject: Re: [TheForge] hydraulic pump
> 
> 
> 
>>Dave & Ralph,
>>
>>Northern Hydraulics has an outlet store in Hudson WI, and you can get the
>>pumps and cylinders for about 1/2 price there.  I say about because
>>sometimes they are miss-marked and you can get a deal of a deal.
>>
>>Northern Tool Outlet
>>1701 Ward Ave
>>Hudson, WI  54016-2129
>>(715) 377-1620
>>
>>Matt is the manager and is extra helpful.  They don't always know what
> 
> they
> 
>>have, as I just alluded to though.
>>
>>I bought a 28 GPM 2-stage pump which I figured would give me .47 in/sec
> 
> and
> 
>>1.9 in/sec with a 6" cylinder and a 1725 rpm motor, about 7 hp electric
>>motor required.  I think it cost me about $80 and still had the plastic
> 
> port
> 
>>covers on it.  It was marked cheaper than a 16 gpm pump.
>>
>>What do you think of those speeds?  I sort of guessed between Batson's
> 
> book
> 
>>and the lies I heard here.
>>
>>Ed
>>
>>----- Original Message -----
>>From: "Ralph Sproul" <[email protected]>
>>To: <[email protected]>
>>Sent: Tuesday, March 18, 2003 5:52 PM
>>Subject: Re: [TheForge] hydraulic pump
>>
>>
>>
>>>        Dave,  Correct on the pump not being a two stage.  Hydraulic
>>>equipment has more HP and needs high volumes of fluid moved to deal with
>>>their work requirements.
>>>
>>>        Chuck's comments on the Batson Plans being something to read is
>>
> a
> 
>>>good suggestion.
>>>        Rule #1 in Hydraulics.  1Hp(electric) = 1 GPM @ 1500 psi.    You
>>
>>can
>>
>>>not run a 10-20 GPM pump(from a fork lift) with a 2-5 hp motor with any
>>>success at all.
>>>        The two stage pumps are the way to go.  The pump you select is
>>>determined by the RPM of the motor you use.  The two stage pumps are
>>
> rated
> 
>>>at 3600 RPM for log splitters and gas engines being set on run which is
>>>about that speed.
>>>        To listen to an electric motor run hydraulics at the
>>>speed.............good luck, break out your hearing protectors!   I
>>
>>prefered
>>
>>>to run the 16 gallon/4 gallon per minute pump(rated at 3600 rpm) on a
>>
> 1750
> 
>>>RPM motor.......thus giving me 8 gallons per minute in the low pressure
>>>section (for speed -1" per second) and 2 gallons per minute in the high
>>>pressure section for reaching 36 tons of force with my press(at 1/4" per
>>>second travel speed -with a 6" cylinder).
>>>
>>>        If you totally understand what I just wrote.......have fun
>>
>>building
>>
>>>your press............if you don't get what I just said, buy the Batson
>>>plans and read them until you understand them.  That is my advice.
>>>
>>>Ralph
>>>
>>>
>>>
>>>----- Original Message -----
>>>From: "Dave Brown" <[email protected]>
>>>To: <[email protected]>
>>>Sent: Tuesday, March 18, 2003 11:51 AM
>>>Subject: Re: [TheForge] hydraulic pump
>>>
>>>
>>>
>>>>At 06:10 03/18/03 -0500, you wrote:
>>>>
>>>>>        The pump of a press is the heart of the tool, my advice is
>>>>
> to
> 
>>>buy a
>>>
>>>>>new two stage pump to start with.  I put three used valves on my
>>>>
> press
> 
>>>>>trying to save money - they all leaked. There is usually a reason
>>>>
> that
> 
>>>>>hydraulics are in the junk yard (I've found them to be less than a
>>>>
>>50/50
>>
>>>>>chance of being what you'd like).  New is pricey, but clean.
>>>>>
>>>>>Ralph
>>>>
>>>> From what I was told, the lift was scrapped because of the drive
>>>
> wheel
> 
>>>and
>>>
>>>>motor.  The hydraulics were, presumedly, in good working order.  But
>>>
> you
> 
>>>>have a good point.  However, it may be worth it to go back and
>>>
> scrounge
> 
>>>the
>>>
>>>>fluid reservoir and maybe some hoses which look pretty new.
>>>>
>>>>Also, am I correct in getting the inference from you and Roger Degner
>>>
>>that
>>
>>>>the pump on these lifts is probably NOT 2-stage?
>>>>
>>>>
>>>>Dave Brown
>>>>Heritage Smithing
>>>>Green Bay, WI
>>>>ABANA, UMBA, GoM, MODA, ARG
>>>>
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>>>>
>>>
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>>
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>>
> 
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