FIXTURE AS 1U5132 - Caterpillar

Illustration 1 g03670479
Proportional reducing valve (power shift solenoid)
(1) Solenoid
(2) Valve body
(3) Line (pilot oil flow) The proportional reducing valve for the power shift pressure is located on the main pump housing. The proportional reducing valve is a solenoid operated control valve. The proportional reducing valve controls the flow of pilot system oil to the main pump regulators. The main pump regulators are used for horsepower control.The solenoid receives a pulse width modulated signal (PWM signal) from the machine ECM. The PWM signal that is sent from the machine ECM causes the proportional reducing valve to regulate the pilot