BEAMNOVA Hand Held/Backpack Electric/Gas Powered Concrete Vibrator With an impressive vibration frequency of over 13,000 vibrations per minute, it removes air bubbles and helps concrete settle faster. The lightweight and compact design is ideal for consistent use. The vibrator features a handy lock-on button for extended use, ideal for construction, patching and other repair jobs. 3/4 HP concrete vibrator, 4.9 ft. long shaft for easy use and long reach. Note: When the item doesn't work after staring, pls gently tap the head of the vibrator to engage it. If the machine still does not start after this operation, please kindly contact us. Please check the vibrator power supply for good contact and ensure correct wiring before use. Connect the vibrating rod after selecting the correct running direction according to the mark. If there is no vibration after the power is applied, please slightly knock the tip of the vibrating rod to the ground till the vibrating bar emits a smooth and powerful squeaking sound. Then the vibrating operation can be performed. When the vibrator is working, the vibrating bar should be inserted into the concrete vertically or obliquely. The vibrating bar should be twitched up and down during the vibration process. In the case of layered pouring of components or buildings, when vibrating the next layer, the vibrating rod should be inserted into the vibrating layer to eliminate the layer indirect seam to obtain the overall pouring effect. After the vibrator has been working for half an hour, it should be stopped for a period of time to prevent mechanical heating and damage. In order to protect the service life of the flexible shaft and hose, the bending radius of the hose during use should be greater than 500mm. After using the vibrating bar for 50-100 hours, all parts in the rod should be disassembled for cleaning. When disassembling, first unscrew the tip, hose and joint, then use a wooden hammer to strike the roller cone protruding from the tip of the rod, take out the roller cone and bearing, oil seal, etc., and then remove the hose connector. After cleaning, replace the damaged parts and reinstall them. All parts except the bearings must be completely cleaned of oil. The cone cone, the raceway cone and the casing should be absolutely oil-free and dry. Install the vibrating rod. The threaded connection must be tightened. If necessary, add waterproof rubber or raw tape to prevent the water and mortar from penetrating into the rod, causing the vibrating rod to be weak or vibrating. In the process of using the vibrating rod, if the vibration is weak or not vibrating, the vibrating rod can be disassembled, the oil seal and bearing damaged in the rod are inspected and replaced, and the cone surface of the casing and the raceway and the rolling cone are cleaned. After reassembling, you can operate it for work. Voltage: 110V Diameter: 1-3/8 inches Vibration Frequency: 13,000 VPM Vibration Rod/Head Length: 15-1/8 inches Length of the power cord: about 157inches 3/4 HP concrete vibrator 1-3/8&#034; diameter vibrator 13,000 vibrations per minute for maximum vibration efficiency Lock-on button for extended use 4.9 ft. long shaft for easy use and long reach.