Isuzu KB P190. Manual - part 1055

UNIT REPAIR (AW30–40LE)

7A4–85

• Install six clutch discs and six brake plates

alternately, starting with clutch disc, onto the rear
planetary gear assembly.

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11. Coat the oil seal ring with ATF and install it to the

output shaft.

NOTE:  Do not spread the ring ends too much.

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12. Install output shaft into rear planetary gear

assembly.

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13. Install second brake assembly to output shaft.

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7A4–86

UNIT REPAIR (AW30–40LE)

First and Reverse Brake (B–3)

Disassembled View

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EndOFCallout

Legend

(1) Thrust bearing and race
(2) Snap ring
(3) Piston return spring
(4) First and reverse brake piston No.2
(5) O-ring

(6) Reaction sleeve
(7) O-ring
(8) First and reverse brake piston No.1
(9) O-ring

(10) Rear planetary gear assembly and output shaft

UNIT REPAIR (AW30–40LE)

7A4–87

Disassembly

1. Remove assembled thrust bearing and race from

transmission case.

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2. Check first and reverse brake piston movement.

Make sure that first and reverse brake piston moves
smoothly when applying and releasing the
compressed air into the transmission case.

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3. Set special tool on the spring retainer, and

compress the return spring.
Spring compressor: 5-8840-0254-0
Remove the snap ring with snap ring pliers.

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4. Remove the piston return spring.

5. Remove the first and reverse brake piston No.2.

Holding the first and reverse brake piston No.2 by
hand, apply compressed air to the transmission
case to remove the first and reverse brake piston
No.2.
Remove the first and reverse brake piston No.2.
If the piston does not pop out with compressed air,
lift the piston out with needle-nose pliers.

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7A4–88

UNIT REPAIR (AW30–40LE)

6. Remove the O-ring from first and reverse brake

piston No.2.

7. Remove the reaction sleeve.

Insert special tool behind the reaction sleeve and
gradually lift it out of the transmission case.
Reaction sleeve puller: 5-8840-2173-0

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8. Remove the O-ring from reaction sleeve.

9. Remove the first and reverse brake piston No.1.

Insert special tool behind the first and reverse brake
piston No.1 and gradually lift it out of the
transmission case.
Piston puller: 5-8840-2174-0

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10. Remove the O-rings from first and reverse brake

pistion No.1.

Reassembly

1. Coat three new O-rings with ATF.

Install the two O-rings on the No.1 piston.

2. Install the O-ring on the reaction sleeve.

3. Install the first and reverse brake piston No.1 to the

reaction sleeve.

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4. Coat a new O-ring with ATF and install it on the first

and reverse brake piston No.2.

5. Install the first and reverse brake piston No.1 with

reaction sleeve onto the first and reverse brake
piston No.2.

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