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| Illustration 1 | g06067419 |
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Vibratory System Hydraulic Schematic OFF (1) Vibratory pump (2) Screed (3) Vibratory manifold (4) Vibratory control valve (5) Relief valve (6) To cooler manifold (7) To hydraulic tank (8) To cooler manifold (9) Vibratory motors | |
Note: The illustration above includes tractor components and screed components.
When the engine is running, vibratory pump (1) generates flow. Supply oil flows to vibratory manifold (3). The oil flow is divided into three branches inside the vibratory manifold. The first branch flows to relief valve (5). The second branch flows to vibratory control valve (4). The third branch flows to vibratory motors (9) on screed (2).
When the vibratory system is off, vibratory control valve (4) is open, and acts as a bypass valve. Supply oil from vibratory pump (1) flows through the vibratory control valve and is directed to oil cooler manifold (6). Under this condition, supply oil pressure is low, and the vibratory motors do not rotate.
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| Illustration 2 | g06067420 |
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Vibratory System Hydraulic Schematic ENABLED (1) Vibratory pump (2) Screed (3) Vibratory manifold (4) Vibratory control valve (5) Relief valve (6) To cooler manifold (7) To hydraulic tank (8) To cooler manifold (9) Vibratory motors | |
Note: The illustration above includes tractor components and screed components.
When the vibratory system is enabled, the vibratory solenoid is energized, and vibratory control valve (4) closes. In this case, oil flow through the control valve is restricted. As the vibratory valve closes, supply oil is directed through the vibratory system on screed (2). Under these conditions, screed vibratory motors (9) rotate.
Vibratory system speed is determined by the current signal sent to the vibratory solenoid. The current signal controls movement of vibratory control valve (4) that controls flow to screed vibratory motors (9). A lower current signal produces a lower vibratory motor speed. A higher current signal produces a higher vibratory motor speed. Vibratory motor speed is adjustable from 700 rpm to 3000 rpm.
The vibratory motors are arranged in a series hydraulic circuit. Oil flows through each motor in sequence. Typically, the sequence begins with the main vibratory motor. The right extender vibratory motor is next, followed by the left extender vibratory motor. Return oil is then directed to cooler manifold (8).
Each vibratory motor is also connected to a case drain circuit. The motor case drain oil is directed to hydraulic tank (7).
Relief valve (5) protects the vibratory system. If system pressure exceeds