(9XL1-228, 3WZ1-157, 2JM1-578, 4JZ1-121, 3TM1-
705, 5BZ1-118, 6EN1-126, 1ZN1-120, 2TN1-117)
(1) Vibratory pump. (2) Servo piston assembly. (3) Pump control
The amount and direction of oil flow from vibratory pump (1) to
the vibratory motor is controlled by servo piston assembly (2)
and pump control valve (3).