[AT] Add-on hydraulics and power steering?

[John Wilkens]

Thanks Dudley...and others... for all the good information.   That 
Forceamerica site sure has a lot of good information.  Haven't had 
time to get throught it all yet.  Guess I'll read up on flow dividers 
next.    John



At 10:08 AM 04/22/2007, you wrote:
>John,
>
>The back fifteen or twenty pages of the 2004 Hydraulic Parts Components
>catalogue from Force America contains a good tutorial on hydraulics.  Their
>website is www.forceamerica.com and their number is 888-99FORCE.  I don't
>have their latest catalogue but I would guess that it would also include
>this tutorial information.
>
>A hydraulic pump can be used for both power steering and another application
>like say a loader.  However, to maintain the performance of the power
>steering system while both turning and using the loader requires a Flow
>Divider (or something that works like it).
>
>A Flow Divider is like a Y valve with one input (which is connected to the
>pump output) and two outputs.  One output is connected to the power steering
>and the other to the loader.  The function of the Flow Divider is to ensure
>that a minimum flow of hydraulic fluid is always diverted to one of its'
>output ports.  Let's say power steering needs a minimum of 3 GPM to function
>properly (I have no idea if this is anywhere near correct).  Then,
>installing a Flow Divider with a 3 GPM rating on one of its' output ports
>for the power steering could be used.  The loader, which is connected to the
>other Flow Divider output port, will then only get what the pump puts out in
>excess of 3 GPM.
>
>FWIW - I have seen several tractors with power steering that used a Flow
>Divider but not also with a loader - usually just a function that required a
>single actuator like an add-on 3-pt hitch.  For a loader application I think
>I would want dedicated pumps for both the loader and power steering, as I
>wouldn't want the loader performance to suffer any while turning.
>
>Dudley
>Snohomish, Washington
>
>
>
>-----Original Message-----
>From: at-bounces at lists.antique-tractor.com
>[mailto:at-bounces at lists.antique-tractor.com]On Behalf Of Larry D Goss
>Sent: Sunday, April 22, 2007 7:18 AM
>To: Antique tractor email discussion group
>Subject: Re: [AT] Add-on hydraulics and power steering?
>
>Are you sure the pump is turning the right way?  Some pumps have the
>pressure relief valve built into them and won't run backwards.
>
>Larry
>
>----- Original Message -----
>From: "John Wilkens" <jwilkens at eoni.com>
>To: <at at lists.antique-tractor.com>
>Sent: Saturday, April 21, 2007 11:15 PM
>Subject: [AT] Add-on hydraulics and power steering?
>
>
> > Anyone know of a good book on very basic practical application of
> > hydraulics and old tractors?  One specific is...can you use a front
> > or rear mount hydraulic pump that is being used to run a loader (etc)
> > to run an add-on power steering unit also?  What capacity pump would
> > be required?  What kind of plumbing and fixtures would be
> > needed?      Also, can a pump be too big to run such a system.    I
> > tried to run a wood splitter off of a large BeeGee pump hooked up to
> > the belt pulley shaft on an AC WC tractor (came off of a Cat) but
> > about all it did was heat up the oil and stall the tractor.  One guy
> > told me the pump was "just too big."  ???
> >
> >                    In the wide-open spaces of NE Oregon
> >
> >
> >
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>
>
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                    In the wide-open spaces of NE Oregon