Posted by pete 23 on February 10, 2009 at 10:25:18 from (173.87.1.12):
In Reply to: farmall 300 hydraulics posted by E. Hanson on February 09, 2009 at 17:10:46:
You are dealing with a spool valve and there is no positive seal as they need clearance to operate.There is no o-ring in the valve that hold the load. Wear over the years allows more leakage past the lands. Make sure though that it is not the cylinder leaking as a leaking cyl will cause pressue to equalize onto the rod side of cyl and about quadruple the pressure making it impossible for spool valve to hold up very long. You can add a single action check block or altelrnating check valve and this will positively hold the load up.
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Today's Featured Article - Converting from 6 Volt to 12 Volt - by Chris Pratt. It's a common problem for old machines especially when the weather starts to dip below 40 and the tractor isn't fired up as often. You are probably used to the 12 volt Diehard, charged with 200 amp alternator of your 3/4 ton that always is ready and always starts. It's this type of experience that brings about the many queries we get for 12-volt conversion kits. Since only a few kits are available (we sell kits for the
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