ROLLER GP-DFLG 5183496 - Caterpillar

Vibratory System ON HI Amplitude
Vibratory System Circuit (Vibratory System ON and High Amplitude
(1) Charge pressure inlet. (2) Pump. (3) Passage. (4) Closed circuit loop line. (5) Motor. (6) Charge relief valve (neutral). (7) Passage. (8) Servo orifice. (9) Control valve. (10) High pressure relief valve. (11) Orifice. (12) Check (make-up) valve. (13) Pilot oil passage. (14) Flushing valve. (15) Flushing relief valve. (16) Servo orifice. (17) High pressure relief valve. (18) Check (make-up) valve. (19) Pilot oil passage. (20) Return oil line to return manifold. (21) Closed circuit loop line.Charge pressure flows through passage (3) to control valve (9) when the engine is operating.Solenoid coil (B) on control valve (9) receives an electrical current when all of the following conditions occur:* The vibratory control switch on the propel handle is in the ON position.* HIGH AMPLITUDE is selected on the vibratory amplitude selection switch on the operator control console.* Engine speed is greater than 1850 rpm. (Vibratory lockout switch opens the control switch circuit when the engine speed is below 1850 rpm).The electrical current to solenoid (B) causes the spool to shift to the position shown. This allows control oil from passage (3) to be directed to the proper side of the pump servo assembly. The control oil moves the swashplate to the maximum angle for high amplitude. Orifice (8) controls oil flow to the pump servo for smooth movement of the swashplate.Oil from vibratory pump (2) flows through closed circuit loop line (4) to motor (5). A high pressure side and a low pressure (return) side of closed loop circuit lines (4) and (21) are established as shown. The oil flowing to vibratory motor (5) becomes the high pressure side of the closed loop circuit. High pressure is created from vibratory motor resistance to flow. The high pressure oil drives vibratory motor (5).Low pressure (return) oil from vibratory motor (5) flows back to pump (2) through line (21) which is now the low pressure (return) side of the closed loop circuit.High pressure relief valve (10) limits the maximum working pressure for closed loop circuit line (4) to 20995 kPa (3045 psi) above the low pressure (return) loop pressure. When circuit pressure in line (4) becomes greater than the high pressure relief valve setting, oil dumps into the charge circuit. High pressure oil dumping into the charge circuit, relieves the high pressure side of the closed loop circuit.High pressure oil from line (4) flows through pilot oil passage (13) and shifts the shuttle spool inside flushing valve (14) to the position shown. Low pressure (return loop) oil from line (21) flows through flushing valve (14) to flushing relief valve (15). Low pressure (return loop) oil dumps over flushing relief valve (15) to flush motor (5). Flushing relief valve (15) is set 172 34 kPa (25 5 psi) lower than the relief pressure of charge (neutral) relief valve (6) in pump (2). This allows motor (5) to be flushed with low pressure (return) oil during vibratory system