| TUCSON(LM) >2011 > G 2.0 DOHC > 4 Wheel Drive (4WD) System > Coupling Assembly > Direct Electro Hydraulic Actuator Coupling (2010-12-01~)>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.).
• | Remove the dipstick and then mount the coupling assembly to the rear differential assembly.
• | Maintain the coupling at a horizontal level after removing the dipstick to prevent the fluid from spilling out.
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. | Remove the electric magnetic clutch connector(A).
4. | Remove the 4WD 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. | Installation is the reverse of removal.
• | Grease the spline hole (A) of the coupling assembly.
Grease Extreme Pressure(EP) grease containing molybdenum disulfide(MoS2)
• | When installation the coupling, be careful not to damage the oil seal (B).
After replacing the coupling, reset the 4WD ECU's clutch learing using the GDS tool. (Refer to " Coupling assembly " in 4WD group)
Adjustment
Description The friction material inside the coupling will degrade over time. Therefore, corresponding compensation values must be referenced and entered after replacing the controller or the coupling. Compensation Requirement and Procedure
1. | Simultaneous replacement of 4WD ECU (Controller) and coupling
A. | Does not require compensation.
2. | Replacement of coupling only
A. | Reset the 4WD ECU's (Controller) clutch learing.
3. | Replacement of 4WD ECU (Controller) only
A. | Before replacement: Check the ECU's clutch learing.
B. | After replacement: Enter the original ECU's clutch learing into the replacement ECU.