FIGURE 4-8. PRESSURE GAGE REMOVAL AND REPLACEMENT
4-11. CHECK VALVE REPLACEMENT.
Disconnect compressor unit from main power supply before servicing, replacing
or repairing parts of equipment, to avoid personal injury.
Release pressure from air receiver and compressor pump before inspection,
performing procedures, or disassembly of equipment to avoid personal injury.
b. Remove check valve by turning counter clockwise until disconnected from street elbow (figure 4-8).