Opel Frontera UBS. Service manual — part 1479
7A–158
AUTOMATIC TRANSMISSION (AW30-40LE)
SECOND BRAKE ASSEMBLY (B–2)
DISASSEMBLY
246RY00006
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
AUTOMATIC TRANSMISSION (AW30-40LE)
7A–159
246RY00007
247RY00001
246RY00008
247RY00034
Important operations
1. Second brake assembly
Remove second brake assembly from output shaft.
2. 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.
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.
INSPECTION AND REPAIR
Check piston return spring
Using calipers, measure the free length of the return
spring.
mm (in.)
Standard length
16.05 (0.6319)
7A–160
AUTOMATIC TRANSMISSION (AW30-40LE)
REASSEMBLY
246RY00023
Reassembly steps
▲
1. O–ring
▲
2. Second brake piston
▲
3. Piston sleeve
▲
4. Piston return spring
▲
5. Spring retainer
▲
6. Snap ring
▲
7. Thrust washer (Plastic)
▲
8. Second brake assembly
AUTOMATIC TRANSMISSION (AW30-40LE)
7A–161
246RY00009
246RY00010
247RY00001
246RY00011
Important operations
1. O–ring
Coat new O–ring with ATF and install them on the second
brake piston.
2. Second brake piston
Being careful not to damage the O–rings, press in the
second brake piston into the second brake drum.
3. Piston sleeve
Install piston sleeve.
4. Piston return spring
Install piston return spring.
5. Spring retainer
Install spring retainer.
6. 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.
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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