RING 1217639 - Caterpillar

Illustration 1 g01382169
Vibratory System ON (1) Line to tractor (2) Vibratory motors (3) Vibratory proportional valve (4) Compensator valve (5) Left side (6) Right side (7) Line from main auxiliary valve (8) Vibratory solenoid (9) Vibratory manifold (10) Anticavitation orifice (11) FilterWhen the engine is running, the auxiliary pump generates flow. Supply oil flows to the vibratory manifold. When the vibratory system is OFF, the vibratory drive solenoid is de-energized. Supply oil does not flow through the vibratory manifold. Under these conditions, the vibratory motors do not rotate.When the paving parameters are met and the screed vibrator switch is in the ON position, the vibratory solenoid is energized. The signal level going to the solenoid is determined by the position of the vibrator speed dial that is located on the right screed operator station. The vibratory drive solenoid shifts the vibratory control spool. This shift directs supply oil to the compensator valve in the control spool.The auxiliary pump supplies oil to the vibratory manifold. The supply oil pressure will change when other auxiliary system functions are energized. The compensator valve prevents the vibratory system from experiencing a decrease in pressure when the supply pressure dips. The compensator valve maintains a pressure differential of 690 kPa (100 psi) between the inlet and the outlet of the vibratory manifold. The vibratory system includes an anticavitation orifice. And the vibratory system includes a bleed off orifice. While the vibratory motors are operating, a small amount of oil flows through the anticavitation orifice and into the return line.
Illustration 2 g01384253
Vibrators ON to OFF (1) Line to tractor (2) Vibratory motors (3) Vibratory proportional valve (4) Compensator valve (5) Left side (6) Right side (7) Line from main auxiliary valve (8) Vibratory solenoid (9) Vibratory manifold (10) Anticavitation orifice (11) FilterWhen the active vibratory switch is moved to the OFF position, the vibratory solenoid de-energizes and oil flow through the vibratory manifold stops. Inertia from the vibratory weights keeps the vibratory motors turning. Pressure on the inlet side of the motors drops below the return pressure. This causes oil to flow through the anticavitation and bleed off orifice until the motors stop turning. The anticavitation orifice and the bleed off orifice also prevents the vibratory motors from turning when the vibratory system is in the OFF position. This is due to a small amount of oil leaking by the vibratory solenoid.