Lexus RX300 (MCU15). Manual — part 579

AX0AO–05

D03673

Snap Ring

Flange

Plate

Disc

Clutch Balancer

Snap Ring

Piston Return Spring

Direct Clutch Piston

Direct Clutch Drum

–

AUTOMATIC TRANSAXLE

DIRECT CLUTCH

AX–59

U140F AX (RM848E)

DIRECT CLUTCH

COMPONENTS

AX0AP–03

D03877

D03675

D03676

AX–60

–

AUTOMATIC TRANSAXLE

DIRECT CLUTCH

U140F AX (RM848E)

DISASSEMBLY

1.

CHECK PISTON STROKE OF DIRECT CLUTCH

(a)

Install the direct clutch and needle roller bearing on the
transaxle rear cover.

(b)

Using a dial indicator, measure the direct clutch piston
stroke while applying and releasing compressed air (392
kPa, 4.0 kgf/cm

2

, 57 psi).

Piston stroke: 0.605 – 0.825 mm (0.02382 – 0.03248
in.)

If the stroke is non–standard, inspect the discs, plates and
flange.

2.

REMOVE SNAP RING

Using a screwdriver, remove the snap ring from the direct clutch
drum.

3.

REMOVE FLANGE, DISC AND PLATE

Remove the flange, 4 discs and 4 plates from the direct clutch
drum.

D03677

SST

D03678

D03679

–

AUTOMATIC TRANSAXLE

DIRECT CLUTCH

AX–61

U140F AX (RM848E)

4.

REMOVE PISTON RETURN SPRING

(a)

Place SST on the clutch balancer and compress the
springs with a press.
SST

09387–00020

(b)

Using a snap ring expander, remove the snap ring from
the direct clutch drum.

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 the deform-
ing.

S

Do not expand the snap ring excessively.

(c)

Remove the clutch balancer and piston return spring from
the direct clutch drum.

5.

REMOVE DIRECT CLUTCH PISTON

(a)

Install direct clutch on the transaxle rear cover.

(b)

Holding the direct clutch piston with your hand, apply
compressed air (392 kPa, 4.0 kgf/cm

2

, 57 psi) to the

transaxle rear cover to remove the direct clutch piston.

AX0AQ–04

D04079

D03830

AX–62

–

AUTOMATIC TRANSAXLE

DIRECT CLUTCH

U140F AX (RM848E)

INSPECTION

1.

INSPECT DISC AND FLANGE

Check to see if the sliding surface of the disc, plate and flange
are worn or burnt.
If necessary, replace them.
HINT:

S

If the lining of the disc is peeling off or discolored, or even
if a part of the printed mark is defaced, replace all discs.

S

Before assembling new discs, soak them in ATF for at
least 15 minutes.

2.

CHECK DIRECT CLUTCH RETURN SPRING

Using a vernier calipers, measure the free length of the spring
together with the spring seat.

Standard free length: 22.58 mm (0.8890 in.)