GASKET 1398028 - Caterpillar

Illustration 1 g06098453
Rear of the Machine
(1) Tamper manifold
(2) Tamper solenoidTamper manifold (1) is located inside the fuel tank compartment, on the rear wall of the tractor. The operator station deck plate provides access to this component.Tamper manifold (1) controls the speed of the tamper motors. The tamper pump provides supply oil to the tamper manifold to drive the tamper system. The tamper manifold contains a valve that controls hydraulic oil flow to the tamper motors. Motor speed is controlled by the position of the valve.Tamper solenoid (2) is a proportional solenoid. This solenoid controls the position of the tamper valve. When the solenoid is not energized, the valve is open. In this case, the tamper supply oil is directed to the oil cooler manifold. As solenoid current increases, the valve closes. This action directs a proportional amount of supply oil to the tamper motors.The screed ECM controls the proportional current signal to tamper solenoid (2). The signal is calibrated at zero motor rpm and at 1800 motor rpm. A linear scale factor is calculated by the ECM to determine the solenoid current required between these speeds. The supplied solenoid signal strength and curve are calculated from the target tamper speed setting and the"Increase Rate" parameter.