Thermovalve (Federal)
Disconnect vacuum hoses from thermovalve. Connect hand vacuum pump to either vacuum nipple. Apply vacuum (no specification). At 122°F (50°C) or less vacuum should leak. At 212°F (100°C) or more, vacuum should hold.
Disconnect vacuum hoses from thermovalve. Connect hand vacuum pump to either vacuum nipple. Apply vacuum (no specification). At 122°F (50°C) or less vacuum should leak. At 212°F (100°C) or more, vacuum should hold.