Cold test:
Place tool, power unit and hoses in a controlled temperature chamber for five hours at -20°C (-4°F). The tool shall be started within 2 minutes after removal and shall be operated for five cycles (open/close). Hot test:
Place tool, power unit and hoses in a controlled temperature chamber for five hours at 49°C (120°F). The tool shall be started within 2 minutes after removal and shall be operated for five cycles (open/close).