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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