FLOW CONTROL AND OVERLOAD RELIEF VALVE
On the 16". 20" and 24" special model FRG-06-24-11 has flow control and overload relief valves.
On the 24" Heavy and 28" the valve is
Maintenance information on both valves is given in
Parts for both valves are shown on parts drawing I-3402-S and 514100-1.
On all the above shapers the relief valve is set to maintain a pressure of 1000 pounds per square inch. If for any
reason there is indication that the pressure has dropped below this point it may be tested by attaching a hydraulic pressure
gage to the opening in the valve body as shown on the illustration in section HYDRAULIC CIRCUIT. Use a gauge having
at least 1500 pounds capacity.
Run the tool head carefully up against the vise or a block bolted to the table thereby stalling the ram and allowing
the pressure to build up to the maximum setting of the valve. If the gauge does not register at least 1000 pounds it is
probable that some obstruction is holding the relief valve open. To correct the difficulty proceed as instructed in bulletin
PRESSURE BALANCING VALVE
The pressure balancing valve is
Parts are shown on Parts Drawing Figure 12.
PRESSURE LUBRICATING VALVE
The valve for maintaining pressure for the ram lubrication is a
Vertical Check Valve.
The same valve is used on all shapers described in this book.