Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 345

AUTOMATIC TRANSMISSION (AW30-40LE) 7A-229

SECOND BRAKE ASSEMBLY (B-2)

DISASSEMBLY

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Disassembly steps

1. Second brake assembly
2. Thrust washer (Plastic)
3. Snap

ring

4. Spring

retainer

5. Piston

return

spring

6. Piston

sleeve

7. Second brake piston
8. O-ring
9. Second brake drum

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Disassembly steps

1. Second brake assembly

Remove second brake assembly from output shaft.

7A-230 AUTOMATIC TRANSMISSION (AW30-40LE)

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2. Thrust washer (Plastic)
3. Snap ring

Place special tool on the spring retainer, and compress
the return spring.
Spring compressor: 5-8840-0254-0 (J-25048)
Remove the snap ring with snap ring pliers.

4. Spring retainer
5. Piston return spring
6. Piston sleeve

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7. Second brake piston

Holding the second brake piston by hand, apply
compressed air to the second brake drum to remove
the second brake piston.
Remove the second brake piston.

8. O-ring
9. Second brake drum

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INSPECTION AND REPAIR

Check piston return spring

Using calipers, measure the free length of the return
spring.
Standard length: 16.05 mm (0.6319 in)

AUTOMATIC TRANSMISSION (AW30-40LE) 7A-231

REASSEMBLY

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Reassembly steps

1. O-ring
2. Second brake piston
3. Second brake drum
4. Piston

sleeve

5. Piston

return

spring

6. Spring

retainer

7. Snap

ring

8. Thrust washer (Plastic)
9. Second brake assembly

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Reassembly steps

1. O-ring

Coat new O-rings with ATF and install them on the
second brake piston.

2. Second brake piston
3. Second brake drum

Being careful not to damage the O-rings, press in the
second brake piston into the second brake drum.

4. Piston sleeve

Install piston sleeve.

7A-232 AUTOMATIC TRANSMISSION (AW30-40LE)

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5. Piston return spring

Install piston return spring.

6. Spring retainer

Install spring retainer.

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7. Snap ring

Place special tool on the spring retainer, and compress
the return spring.
Spring compressor: 5-8840-0254-0 (J-25048)
Install the snap ring with snap ring pliers.
Be sure the end gap of the snap ring is not aligned with
the spring retainer claw.

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Check second brake piston movement

Make sure the second brake piston moves smoothly
when applying and releasing the low compressed air to
the second brake drum.

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8. Thrust washer (plastic)

Coat the thrust washer with petroleum jelly and install it
to the second brake piston, with the grooved side
facing upward.
NOTE:
Make sure that the cutout portions of the thrust
washer match the teeth of the spring retainer.

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9. Second brake assembly

Install second brake assembly to output shaft.