V Style 2-Cylinder 2-Stage Air Compressor Pump Motor Head 5.5HP 4000W 175PSI. Rated Pressure: 175 Psi (1.16Mpa). Driving Power: 4Kw (5.5Hp). Cylinder Diameter: 3.54 (90mm). Distance Of Screw Hole: 26cm14cm (10.2″5.5″). Rated Exhaust Volume: 0.6L/Min. Note: If The Motor Speed Is 2880rpm, The Diameter Of The Motor Wheel Is 10 Cm. If The Motor Speed Is 1440rpm, The Motor Wheel Is 20 Cm. 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. 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. Tighten The Screws (Including The Base And Pulley Screws). 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. 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. The Rotation Direction Of The Pump Head Is Clockwise. If It Reverses, Please Adjust It In Time. Change The Oil For The First Half Month, The Second One And a Half Months, And The Next Two To Three Months. 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. The Operation Of The Machine Will Produce High Temperature, Be Careful Not To Burn! 1 Air Compressor Pump Head. 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.