Hyundai Tucson: Coupling Assembly / Oil hydraulic Motor(Actuator)

- Description The 4WD ECM controls the Pump Motor Pump (Actuator) to generating an oil pressure. The pressure engages a multiple disk clutch to transfer torque to the rear wheels. The torque to the rear wheels varies according to the pressure on the clutch.

• If you have trouble code related to the oil hydraulic motor (actuator), check oil hydraulic motor (actuator) according to the inspection process.

Oil Hydraulic Motor (Actuator) Inspection Procedure

• Be careful not to damage the parts located under the vehicle (floor under cover, fuel filter, fuel tank and canister) when raising the vehicle using the lift.(Refer to General Information - "Lift and Support Points")

1.Remove the coupling assembly.(Refer to 4 Wheel Drive (4WD) System - "Direct Electro Hydraulic Actuator Coupling")

2.Keep going perpendicular state after remove the coupling assembly.

• Keep going perpendicular state during remove (install) the hydraulic motor (actuators).

• Use a tool (A) that allows the auxiliary operator to hold or seat the coupling in a vertical position.

• So that the input shaft side (B) is not damaged.

3.Remove the hydraulic motor (A) after loosening bolts with hex wrench.

• Remove the hydraulic motor (actuators) after dropping residual oil as much as possible inside the coupling. (abut 5-10 sec)

1.Before installation, wipe the surface with a clean cloth.

2.Check the O-rings (A) of the new hydraulic motor (actuators).

• You have to prevent any dust from entering inside hydraulic motors (actuators) and housing.

3.Tighten the bolts after install the hydraulic motor.

• When installing, motor connector (A) has to toward in the direction of outside of the coupling.

Tightening torque:9.8 - 11.7 N·m (1.0 - 1.2 kgf·m, 7.2 - 8.6 lb·ft)

• When installing, oil can be reflux by the pressure in air breather hole (A).

• Change direction in the direction of the arrow and lay on the floor as shown in the illustration. ※ The reflux oil will flow to the bottom.

• You have to prevent additional backflow in according to order as shown in the illustration.

4.Wipe the flowed oil to around the surface with a clean cloth.

5.Install the coupling assembly.(Refer to 4 Wheel Drive (4WD) System - "Direct Electro Hydraulic Actuator Coupling")