Where would a guy find a manifold block that he could attach a
hydraulic pump, motor, and reservoir to make a DC power unit like a
Fenner or Haldex? I'm looking for one that could be used to make a
"Andy H " wrote
in message news: firstname.lastname@example.org...
There are all variety of modular valve and regulator bodies that can be
stacked to form a "block" of hydraulic functions.
Most any hydraulic shop will have what you need, but usually on the costy
side -- they don't often stock the low-end stuff like "Red Lion" (Northern
tools) and Prince.
Although Northern Tools carries (mostly) relatively low cost, low quality
hydraulic stuff, I can tell you from experience that the less expensive
components last just fine if the oil is kept clean, and the service duty
cycle is low enough. I use my shop-built 12 ton press roughly seven running
hours a week, and it's been perfect for nine years. It was made entirely
from Northern components, except for the motor, which is a GE pool pump 2HP
Thanks for the offer Igor, that's mighty nice of you. I decided that
putting a pump together myself wasn't worth the effort, and just
bought a double-acting unit, so I don't have any use for that valve.
Thanks anyway though!
Thanks to the rest of you who replied as well. I got a DA cylinder
from Surplus Center a few weeks back, but using it in single acting
fashion with my H-frame press as a replacement for the original bottle
jack wasn't working the way I had intended. The piston would power up
just fine, but the springs that returned the orginal piston in the
bottle jack just weren't doing the trick for this new cylinder. Turns
out that this cylinder requires about 300lbs of force to overcome the
gland friction and return...a force that those springs weren't
supplying. All should be well with a DA pump.
As an aside, this cylinder is a 3" bore, 2" rod, with 10" stroke (SC #
9-5556). The rod will move in the pushing direction with as little as
35 PSI from the pump, but returning the cylinder needs at least 45 PSI
with no back pressure present. I'm unable to move the rod by hand
with both ports open to atmosphere. Do you guys think I might have a