1.16 SCREED VIBRATION MOTORS.

TM 5-3895-373-34 1.16 SCREED VIBRATION MOTORS. There are two different screed vibration motors, described as follows: a. Main screed vibration motor. The main screed vibration motor is a gear-type, fixed displacement, bi-directional hydraulic motor. It is located on the main screed and provides power to both the left and right main screed vibrators. The motor has a displacement of 0.45 cubic inches (7,37 ml) per revolution and operates at 2000 psi (13 790 kPa). It is powered by the left auxiliary hydraulic pump and the auxiliary vibration pump. Hydraulic oil flows through a gerotor to power the drive shaft. The motor is equipped with a check valve to regulate case pressure. A two-bolt motor mount connects the hydraulic motor to the right vibrator on the main screed. The left vibrator is driven by the right vibrator through a drive shaft. b. Extension screed vibration motors. The extension screed vibration motors are gear-type, fixed displacement, bi-directional hydraulic motors. The left extension screed vibration motor is located on the left extension screed. The right extension screed vibration motor is located on the right extension screed. Hydraulic oil flowing out of the main screed vibration motor is directed to the extension screed vibration motors. A 50/50, spool-type flow divider splits hydraulic oil between the two extension screed vibration motors. A two-bolt motor mount connects each motor to the offset vibrators. Each motor has a displacement of 0.218 cubic inches (3,57 ml) per revolution and operates at 2000 psi (13 790 kPa). A gerotor powers the drive shaft on each motor. Each motor is equipped with a check valve to regulate case pressure. 1-8