TM 5-3895-373-341.16SCREEDVIBRATIONMOTORS.There are two different screed vibration motors,described as follows:a.Main screed vibration motor. The mainscreed vibration motor is a gear-type, fixeddisplacement, bi-directional hydraulic motor. It islocated on the main screed and provides power to boththe left and right main screed vibrators. The motor has adisplacement of 0.45 cubic inches (7,37 ml) perrevolution and operates at 2000 psi (13 790 kPa). It ispowered by the left auxiliary hydraulic pump and theauxiliary vibration pump. Hydraulic oil flows through agerotor to power the drive shaft. The motor is equippedwith a check valve to regulate case pressure. A two-boltmotor mount connects the hydraulic motor to the rightvibrator on the main screed. The left vibrator is driven bythe right vibrator through a drive shaft.b.Extension screed vibration motors. Theextension screed vibration motors are gear-type, fixeddisplacement, bi-directional hydraulic motors. The leftextension screed vibration motor is located on the leftextension screed. The right extension screed vibrationmotor is located on the right extension screed. Hydraulicoil flowing out of the main screed vibration motor isdirected to the extension screed vibration motors. A50/50, spool-type flow divider splits hydraulic oil betweenthe two extension screed vibration motors. A two-boltmotor 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 (13790 kPa). A gerotor powers the drive shaft on eachmotor. Each motor is equipped with a check valve toregulate case pressure.1-8
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