Removing
1. Disconnect the hose from the booster one-way valve mounted on the front of the unit.
2. Remove the valve from the rubber o-ring using a twisting motion. Remove the o-ring from the amplifier.
Health check
1. Inspect the valve for damage and replace if necessary. Direct a stream of air through the valve. A serviceable valve allows air to pass in only one direction - from the amplifier to the pipeline. Replace valve if not.
2. Inspect the rubber o-ring and flexible vacuum hose for damage and replace as needed.
Installation
1. Install O-ring and reinforcement.
2. Place the one-way valve in service position, being careful not to dislodge or damage the O-ring, then connect the vacuum hose.
3. Finally, start the engine and check the amplifier for air leaks.