Posted by buickanddeere on December 12, 2012 at 09:29:47 from (126.96.36.199):
In Reply to: plumbing loader posted by noshow on December 12, 2012 at 08:14:48:
Quoting Removed, click Modern View to see
Not even close
The pump, relief valve, loader control valve, scv and rockshaft valves will all be in series.
Do you know the difference between and open and closed Center hydraulic system?
The loader control valve will either have six ports and there will be a dedicated relief valve between the pump outlet and the first hydraulic control valve.
Or there will be seven ports on the loader control valve. Pressure in from the pump,pressure out to the scv . A port for boom up, a port for boom down, a port for bucket dump, a port for bucket curl. A port from the relief valve back to the hydraulic sump.
Since I avoid 2010's it's been a while since looking at one. Another way of plumbing would be to.....There must be a relief valve in the Scv and rockshaft valves. Taking oil downstream from either one of those two valves with the relief would protect the tractor's pump.
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