LINER A. 8F8568 - Caterpillar

The solenoid valves for the left clutch and the right clutch are outputs of the ECM. The ECM uses these solenoid valves to steer the machine. The solenoids control the amount of oil pressure that is applied to the corresponding clutch. Each solenoid for the clutches has a connector with two contacts. One contact receives a signal from the corresponding left J1-61 connector contact or the rightJ1-62 connector contact of the ECM. The other contact of each solenoid is connected to the return circuit of the solenoid at J1-60. Note: The solenoid coils are not designed for the operation of 24 VDC directly. The ECM sends a 24 V PWM signal at a duty cycle which provides the necessary current to the solenoid coils. Do NOT activate the coils