Lexus RX300 (MCU15). Service manual — part 584
AX0B6–03
D03827
D03826
D03692
D03693
SST
D03694
–
AUTOMATIC TRANSAXLE
UNDERDRIVE PLANETARY GEAR
AX–79
U140F AX (RM848E)
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 the 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
09214–76011
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.
D03695
D03696
D03688
SST
D03685
SST
SST
D03852
AX–80
–
AUTOMATIC TRANSAXLE
UNDERDRIVE PLANETARY GEAR
U140F AX (RM848E)
(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: 262 N·m (2,672 kgf·cm, 194 ft·lbf)
SST
09564–16020
HINT:
Use a torque wrench with a fulcrum length of 750 mm (29.53
in.).
3.
MEASURE STARTING TORQUE OF U/D INPUT SHAFT
Using SST and a small torque wrench, measure the starting
torque of U/D input shaft.
SST
09387–00050, 09564–16020
Starting torque:
0.5 – 3.3 N·m (5 – 33 kgf·cm, 4.3 – 28.6 in.·lbf)
HINT:
Use a torque wrench with a fulcrum length 160 mm (6.3 in.).
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.
AX0B0–05
D03697
Snap Ring
Plate
Disc
Snap Ring
Clutch Blancer
Piston Return Spring
U/D Clutch Piston
U/D Clutch Drum
Flange
z Non–reusable part
z O–ring
–
AUTOMATIC TRANSAXLE
UNDERDRIVE CLUTCH
AX–81
U140F AX (RM848E)
UNDERDRIVE CLUTCH
COMPONENTS
AX0B1–03
D03699
D03700
D03701
D03702
D03703
SST
AX–82
–
AUTOMATIC TRANSAXLE
UNDERDRIVE CLUTCH
U140F AX (RM848E)
DISASSEMBLY
1.
CHECK PISTON STROKE OF U/D CLUTCH
(a)
Install the U/D clutch to the transaxle case.
NOTICE:
Be careful not to damage the oil seal rings.
(b)
Install the dial indicator, as shown in the illustration.
(c)
Measure the U/D clutch piston stroke while applying and
releasing compressed air (392 kPa, 4.0 kgf/cm
2
, 57 psi).
Piston stroke: 1.51 – 1.77 mm (0.0594 – 0.0697 in.)
If the piston stroke is non–standard inspect the discs, plates
and flange.
2.
REMOVE FLANGE, DISC AND PLATE
(a)
Using a screwdriver, remove the snap ring.
(b)
Remove the flange, 4 discs and 4 plates from the U/D
clutch drum.
3.
REMOVE PISTON RETURN SPRING
(a)
Place SST on the clutch balancer and compress the
spring with a press.
SST
09350–32014 (09351–32070)
(b)
Using a snap ring expander, remove the snap ring.
NOTICE:
S
Stop the press when the spring sheet is lowered to the
place 1 – 2 mm (0.039 – 0.078 in.) from the snap ring
groove, preventing the spring sheet from deforming.
S
Do not expand the snap ring excessively.
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