Using this pump is easy. First, attach the pump head to your tire valve. Make sure it's a proper fit and use the thumb lock lever to secure an air - tight seal. Start pumping. You'll notice that with the TwinTurbo technology, pulling the pump compresses a large volume of air, and pushing inflates the tire with high pressure. Keep an eye on the large, easy - to - read gauge to reach your desired tire pressure. After use, detach the pump from the valve and put the dust cap back on to keep the pump head clean. For maintenance, store the pump in a dry place. If it gets dirty, you can wipe it with a clean, dry cloth. Don't expose it to extreme temperatures or harsh chemicals. Check the integrity of the thumb lock lever and the dust cap regularly to ensure they work properly.