Hyundai Tucson: Coupling Assembly / Direct Electro Hydraulic Actuator Coupling Repair procedures

Hyundai Tucson (LM) 2010-2015 Service Manual / 4 Wheel Drive (4WD) System / Coupling Assembly / Direct Electro Hydraulic Actuator Coupling Repair procedures

Inspection
   
All units are filled up with coupling fluid (ultra-low viscosity ATF) prior to shipping. Inspection, fill-up, and replacement of coupling fluid is therefore not necessary (zero maintenance, lifetime fluid).
Removal
   
Coupling Maintenance Precautions
Maintain the coupling at a horizontal level.
Refer to the handling caution level (A) when servicing the coupling (removal, installation, replacement, etc.).

1.
Remove the 4WD coupling assembly bolts (A-3ea) mounted to the rear propeller shaft (B).

Tightening torque :
49.0~68.6N.m (5.0~7.0kgf.m, 36.2~50.6lb-ft)

2.
Using a flat tool, separate the propellar shaft from 4WD coupling assembly.
3.
Disconnect the pressure sensor connector (A) and Oil hydraulic Motor connector (B).

4.
Loosen the coupling assembly mounting bolts (A-4ea).

Tightening torque :
58.8~63.7N.m (6.0~6.5kgf.m, 43.4~47.0lb-ft)

5.
Using a flat tool, separate the 4WD coupling assembly from the rear differential carrier assembly.
Installation
1.
Install in the reverse order of removal.
   
Smear the splines (A) with molybdenum type high pressure grease.
When install the coupling, be careful not to damage the oil seal (B).

2.
After replacing the coupling, reset the 4WD ECU's clutch learing using the GDS tool.
(Refer to 4WD Control System - "Adjustment")
Direct Electro Hydraulic Actuator Coupling Description and Operation
Description 4WD ECU processes signals from various sensors and determines the current road and driving conditions. The ECU then utilizes this information to implement precision control over th ...

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. The torque to t ...

Other information:

Hyundai Tucson (LM) 2010-2015 Owners Manual: Operating door locks from inside the vehicle
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Hyundai Tucson (LM) 2010-2015 Owners Manual: Hazardous driving conditions
When hazardous driving conditions are encountered such as water, snow, ice, mud or sand: Drive cautiously and allow extra distance for braking. Avoid sudden movements in braking or steering. If stuck in snow, mud, or sand, use second gear. Accelerate slowly to avoid spinning the drive wheels. ...

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