Vibratory System ON -HI AMPLITUDE
Vibratory System Circuit Diagram - ON - HIGH AMPLITUDE.
(1) Vibratory motor. (2) Flushing relief valve. (3) Oil line from propel cooling valve. (4) Closed circuit loop line. (5) Check valve. (6) Servo piston
assembly. (7) Charge relief valve. (8) Oil line from hydraulic oil filter (9) Vibratory pump. (10) Vibratory flushing valve. (11) Closed circuit loop line.
(13) Hydraulic oil tank. (14) Vibratory amplitude valve. (15) High pressure relief valve.
Vibratory servo valve (14) receives an electrical input when the
vibratory control switch is in the ON position and the vibratory
selection switch is moved to the HIGH AMPLITUDE position.
The electrical input causes the vibratory amplitude valve to
move from centered position to the straight through position.
This allows charge oil from oil line (8) to pass across the relief
valve to servo piston assembly (6), moving the swashplate to
from vibratory pump (9) flows into closed maximum angle for
high amplitude. The vibratory selector switch controls the
direction of swashplate angle by sending current to one of the
vibratory servo valve coils.
High pressure oil delivered from vibratory pump (9) flows into
closed circuit loop line (4). The high pressure oil drives
vibratory motor (1). Low pressure oil from the vibratory motor
flows back to the vibratory pump through closed circuit loop
When the vibratory system is being operated, the return loop
pressure is limited to 1725 140 kPa (250 20 psi) by flushing
relief valve (2). High pressure oil in closed circuit loop line (4)
moves the shuttle valve spool inside vibratory flushing valve
(10) from centered position to allow hot, low pressure oil in
closed circuit loop line (11) to flow through vibratory flushing
valve (10) and the hydraulic oil cooler before entering the
hydraulic oil tank. Fresh charge oil enters low pressure closed
circuit loop line (11) through check valve (5), compensating for
oil loss through the vibratory flushing valve and internal
Oil which passes from the closed circuit into the vibratory pump
is returned to the hydraulic oil tank.