Safety Related Notes
Before working on this machine, perform lockout-tagout procedures per the rules of your plant. Determine the sources of energy on this machine – electrical, pneumatic and hydraulic – and release or vent sources of stored energy – electrical capacitors, air receivers, and hydraulic accumulators. Shut off sources of power – electrical, pneumatic and hydraulic. Safely block mechanical sources of energy such as loaded springs and loaded machine members, or safely position the machine members so they are unloaded and springs are not under tension. Beware of hot hydraulic fluid and hot surfaces which can cause burns. Never “crack a hydraulic or pneumatic fitting” to check for the presence of stored energy. Hydraulic fluid injection injuries, as well as injection injuries from many other fluids, are extremely serious and must be treated immediately by medical personnel familiar with this type of injury. Loss of body parts or death may result from improperly treated fluid injection injuries! Never use your hands to feel for a hydraulic leak! Review the schematics and think before proceeding to work on the machine to ensure you have made the machine safe to work on.
Component:
303.17
Description:
4/2 SS Directional Control Valve
Manufacturer:
Rexroth
Part Number:
4WE10D30/CW110/60NZ5L
Stock Code:
Not Provided
Electrical Address:
Not Provided
Component Application:
This directional control valve is used to select between Pressure Relief Valve 276.17 (set at 4060 psi) and Pressure Relief Valve 276.18 (set at 2465 psi) which control the pressure compensator setpoint for Pressure Compensated Pump 006.02. When this directional control valve is de-energized the pressure compensator setpoint is 4000 psi and when the directional control valve is energized the pressure compensator setpoint is 2465 psi. Note that the relief valves control the setpoint of the pressure compensator and flow delivered by the pump does not flow through either of the relief valves.
