Motor Parts & Accessories. Musical Instruments & Gear. You may also like. Upgrade Version5.5HP Twin Cylinder Air Compressor Pump Head 21CFM Double Stage. US 5.5HP 21CFM 181PSI V Type Twin Cylinder Air Compressor Pump Head Double Stage. High efficiency, high precision, universal, low energy consumption. High quality material, not easy to damage. Strict balance support and correction to ensure the smooth operation of the main engine. Special valve steel is used for hair piece, which has good strength and toughness at high temperature. Faster inflation and low noise. Strong cooling blade, good cooling performance. 1 When placing the pump head, the motor pulley and the belt pulley must be in the same straight line. The more aligned, the less vibration. 2 Tighten the screws (including the base and pulley screws). 3 After the screws are installed, the belt shall be tightened. If the belt is loose, please move the motor. After the screws are tightened, reinstall the belt. 4 The new machine must be filled with engine oil before starting, and the engine oil shall be added to the center of the red point of the oil mirror. 5 The rotation direction of the pump head is clockwise. If it reverses, please adjust it in time. 6 Change the oil for the first half month, the second one and a half months, and the next two to three months. 7 Replace the air filter regularly. Under normal conditions, it must be replaced in two to three months, and in case of poor environment, it must be replaced in one month. 8 The operation of the machine will produce high temperature, be careful not to burn! 1181PSI 5.5HP 21CFM V Type Twin Cylinder Air Compressor Pump Head Double Stage. Feedback is very important to us. It is impossible to address issues if we do not know about them! Faction is our ultimate goal. We work hard to earn your trust and future business. A If you receive a defective item, you may return it or ask for a discount. Due to time zones, our reply to your questions may not be immediately. If it’s non-workdays, please kindly be patient and wait till Monday. The item “Upgrade Version5.5HP Twin Cylinder Air Compressor Pump Head 21CFM Double Stage” is in sale since Thursday, August 6, 2020. This item is in the category “Home & Garden\Tools & Workshop Equipment\Air Tools & Air Compressors\Air Compressors”. The seller is “hotbid8088″ and is located in Rowland Heights, California. This item can be shipped to United States.