Underdrive Planetary Gear

DISASSEMBLY





1. MEASURE TURNING TORQUE OF U/D OUTPUT SHAFT
Using SST and a small torque wrench, measure the turning torque of the U/D output shaft.
SST 09387-00050, 09560-16020
Turning torque at 60 rpm: 0.79 - 5.77 Nm (8 - 59 kgf-cm, 7.0 - 51.1 inch lbs.)

HINT: Use a torque wrench with a fulcrum length of 160 mm (6.3 inch).

2. REMOVE CYLINDRICAL ROLLER BEARING INNER RACE





a. Using SST, loosen the staked part of the nut.
SST 09930-00010 (09931-00010, 09930-00020)





b. Clamp the U/D planetary gear in soft jaw vise.

NOTICE: Be careful not to damage the differential drive pinion.





c. Using SST, remove lock nut.
SST 09560-16020





d. Using SST, remove cylindrical roller bearing inner race.
SST 09950-00020, 09950-00030, 09950-00010 (09951-00340)
3. REMOVE U/D PLANETARY GEAR





a. Using SST and a press, remove the differential drive pinion, parking lock gear, counter driven gear with U/D planetary ring gear and tapered roller bearing FR.
SST 09387-00050
b. Clamp the U/D planetary gear in soft jaw vise.





c. Using SST, remove the tapered roller bearing RR from the U/D planetary gear.
SST 09950-00020, 09950-00030, 09950-00010 (09951-00320)
4. REMOVE U/D PLANETARY RING GEAR





a. Using snap ring pliers, remove snap ring.





b. Remove the U/D planetary ring gear from the counter driven gear.

REASSEMBLY
1. INSTALL U/D PLANETARY RING GEAR





a. Install the U/D planetary ring gear to the counter driven gear.





b. Using snap ring pliers, install snap ring.
2. INSTALL U/D PLANETARY GEAR





a. Using a press, install the tapered roller bearing RR to the U/D planetary gear.

NOTICE: Press in the bearing until it becomes flat at the bottom.

b. Install the counter driven gear with the U/D planetary ring gear.





c. Using SST and a press, install the tapered roller bearing FR.
SST 09210-76011

NOTICE: Press in the counter driven gear while rotating it.





d. Using a press, install the parking lock gear.

NOTICE: Press in the counter driven gear while rotating it.





e. Using a press, install the differential drive pinion.

NOTICE: Press in the counter driven gear while rotating it.

HINT: When replacing the differential drive pinion, replace it together with the U/D planetary gear.





f. Using a press, install the cylindrical roller bearing inner race.

NOTICE: Press in the counter driven gear while rotating it.





g. Clamp the U/D planetary gear in soft jaw vise.

NOTICE: Be careful not to damage the differential drive pinion.

h. Using SST, install a new lock nut.
Torque: 280 Nm (2,855 kgf-cm, 207 ft. lbs.)
SST 09560-16020

HINT: Use a torque wrench with a fulcrum length of 750 mm (29.53 inch).





3. MEASURE TURNING TORQUE OF U/D OUTPUT SHAFT
Using SST and a small torque wrench, measure the turning torque of U/D output shaft.
SST 09387-00050, 09560-16020
Turning torque at 60 rpm: 0.9 - 5.77 Nm (8 - 59 kgf-cm, 7.0 - 51.1 inch lbs.)

HINT: Use a torque wrench with a fulcrum length 160 mm (6.3 inch).





4. STAKE LOCK NUT
Using a pin punch and hammer, stake the lock nut.

NOTICE: Also, make sure that there are no cracks on the nut.