Hyundai Kona: Coupling Assembly / Oil hydraulic Motor(Actuator) Repair procedures

Hyundai Kona (OS) 2018-2021 Service Manual / 4 Wheel Drive (4WD) System / Coupling Assembly / Oil hydraulic Motor(Actuator) Repair procedures

Inspection
  
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

Removal
1.
Remove the coupling assembly.
(Refer to 4WD Control System - "Coupling Assembly")
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)

Installation
1.
Before installation, wipe the surface (A) 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.
After mounting the hydraulic motor (actuator) (A), tighten the bolts.
  
When installing, motor connector has to toward in the direction of outside of the Coupling.
Tightening torque :
8.8 - 10.8 N.m (0.9 - 1.1 kgf.m, 6.5 - 8.0lb-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.

Oil hydraulic Motor(Actuator) Description and operation
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. ...

Pressure Sensor Description and operation
Description The 4WD ECU makes a Motor Pump (Actuator) turn round for generating an oil pressure. And then it presses a multiple disk clutch and transfers the generated torque int ...

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