Lexus RX300 (MCU15). Service manual — part 570

D03600

SST

D03800

D03913

D03601

SST

D03602

–

AUTOMATIC TRANSAXLE

COMPONENT PARTS

AX–23

U140F AX (RM848E)

(b)

Using SST, a press and snap ring expander, remove the
snap ring and piston return spring.
SST

09387–00070

NOTICE:

S

Stop the press when the spring sheet is lowered 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.

(c)

Apply compressed air (392 kPa, 4.0 kgf/cm

2

, 57 psi) to the

transaxle case to remove 1st & reverse brake piston.

NOTICE:

S

Blowing off the air may cause the piston jump–out.
When removing the piston, hold it with your hand us-
ing a waste cloth.

S

Take care not to splash ATF when air–blowing.

(d)

Remove the 2 O–rings from the 1st & reverse brake pis-
ton.

44.

REMOVE COUNTER DRIVE GEAR

(a)

Using SST and a press, remove the counter drive gear
from the transaxle case.
SST

09950–60010 (09951–00600), 09950–70010
(09951–07100)

(b)

As shown in the illustration, tighten 2 bolts evenly and
make clearance of approx. 20.0 mm (0.797 in.) between
the counter drive gear and the inner race.

D03603

SST

D03798

D03604

D03799

D03794

AX–24

–

AUTOMATIC TRANSAXLE

COMPONENT PARTS

U140F AX (RM848E)

(c)

Using SST, remove the tapered roller bearing RH.
SST

09950–00020, 09950–00030, 09950–60010
(09951–00600)

(d)

Using a brass bar and hammer, remove the 2 bearing out-
er races.

(e)

Using a screwdriver, remove the snap ring from the trans-
axle case.

45.

REMOVE U/D BRAKE PISTON

(a)

Apply compressed air (392 kPa, 4.0 kgf/cm

2

, 57 psi) to the

transaxle case and remove the U/D brake piston.

(b)

Remove the 2 O–rings from the U/D brake piston.

D03605

SST

D03914

D03606

SST

D03915

D03607

–

AUTOMATIC TRANSAXLE

COMPONENT PARTS

AX–25

U140F AX (RM848E)

(c)

Using SST, remove the needle–roller bearing from the
transaxle case.
SST

09387–00040, (09387–01020, 09387–01030,
09387–01040)

(d)

Remove the 2 oil seal rings from the transaxle case.

46.

REMOVE U/D CYLINDRICAL ROLLER BEARING

(a)

Using SST, remove the cylindrical roller bearing from the
transaxle case.
SST

09514–35011

(b)

Remove the oil seal ring from the transaxle housing.

47.

REMOVE APPLY PIPE

Remove the bolt, clamp and apply pipe from the transaxle case.

AX11M–01

AX–26

–

AUTOMATIC TRANSAXLE

COMPONENT PARTS

U140F AX (RM848E)

REASSEMBLY

NOTICE:

S

The automatic transaxle is composed of highly precision–finished parts, necessitating careful
inspection before reassembly because even a small nick could cause fluid leakage or affect
the performance. The instructions here are organized so that you work on only one component
group at a time. This will help avoid confusion from similar–looking parts of different sub–as-
semblies being on your workbench at the same time. The component groups are inspected and
repaired from the converter housing side. As much as possible, complete the inspection, repair
and reassembly before proceeding to the next component group. If a defect is found in a certain
component group during reassembly, inspect and repair this group immediately. If a compo-
nent group cannot be assembled because parts are being ordered, be sure to keep all parts of
the group in a separate container while proceeding with disassembly, inspection, repair and
reassembly of other component groups.
Recommended ATF: ATF TYPE T–IV

S

All disassembled parts should be washed clean and any fluid passages and holes should be
blown through with compressed air.

S

Dry all parts with compressed air–never use shop rags.

S

When using compressed air, always aim away from yourself to prevent accidentally spraying
ATF or kerosene on your face.

S

The recommended ATF or kerosene should be used for cleaning.

S

After cleaning, the parts should be arranged in the correct order for efficient inspection, repairs,
and reassembly.

S

When disassembling a valve body, be sure to match each valve together with the correspond-
ing spring.

S

New discs for the brakes and clutches that are to be used for replacement must be soaked in
ATF for at least 15 minutes before reassembly.

S

All oil seal rings, clutch discs, clutch plates, rotating parts, and sliding surfaces should be
coated with ATF prior to reassembly.

S

All gaskets and rubber O–rings should be replaced.

S

Do not apply adhesive cements to gaskets and similar parts.

S

Make sure that the ends of a snap ring are not aligned with one of the cutouts and are installed
in the groove correctly.

S

If a worn bushing is to be replaced, the sub–assembly containing the bushing must also be re-
placed.

S

Check thrust bearings and races for wear or damage. Replace if necessary.

S

Use petroleum jelly to keep parts in place.

S

When working with FIPG material, you must observe the following.
Using a razor blade and a gasket scraper, remove all the old packing (FIPG) material from the
gasket surface.
Thoroughly clean all components to remove all the loose material.
Clean both sealing surfaces with a non–residue solvent.
Parts must be reassembled within 10 minutes of application. Otherwise, the packing (FIPG) ma-
terial must be removed and reapplied.