2007 ISUZU KB P190 brake

UNIT REPAIR (AW30–40LE) 7A4–81
Disassembly
1. Remove second brake assembly from output shaft.
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2. Remove oil seal ring from output shaft.
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3. Remove the seven discs, seven plates and flange(B–3). 4. Remove rear planetary gear from rear planetary ring
gear.
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5. Check operation of No.2 one-way clutch.Hold the planetary gear and turn the one-way clutch
inner race.
The one-way clutch inner race should turn freely
counterclockwise and should lock clockwise.
RUW37ASH004701
En dOFCallout
Legend
(1) Lock
(2) Free

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ISUZU KB P190 2007

7A4–84 UNIT REPAIR (AW30–40LE)
7. While turning counterclockwise, install one-wayclutch inner race to rear planetary gear.
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8. Check operation of one-way clutch.Hold the planetary gear and turn the one-way clutch
inner race.
The one-way clutch inner race should turn freely
counterclockwise and should lock clockwise.
RUW37ASH004701
E ndOFCallout
9. Install rear planetary gear onto rear planetary ring gear.
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10. Install the disc, plate and flange (B –3).
 Install a brake flange onto the rear planetary gear
assembly.
 Install a clutch disc onto the rear planetary gear
assembly.
NOTE: The claw interval of the plate should be as
shown in the figure when viewing the clutch plate from
the arrow direction.
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Legend
(1) Lock
(2) Free

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ISUZU KB P190 2007

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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ISUZU KB P190 2007

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

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ISUZU KB P190 2007

UNIT REPAIR (AW30–40LE) 7A4–87
Disassembly
1. Remove assembled thrust bearing and race fromtransmission 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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ISUZU KB P190 2007

7A4–88 UNIT REPAIR (AW30–40LE)
6. Remove the O-ring from first and reverse brakepiston 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 firstand 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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ISUZU KB P190 2007

UNIT REPAIR (AW30–40LE) 7A4–89
6. Align the teeth of the first and reverse brake pistonNo.2 into the proper grooves.
Being careful not to damage the O-rings, press in
the first and reverse brake piston No.2 with No.1
into the transmission case.
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7. Place piston return spring onto first and reverse brake piston No.2.
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8. Set special tool as shown, and compress the returnspring with special tool.
Spring compressor: 5-8840-0254-0
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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9. Check first and reverse brake piston movement. Make sure the first and reverse brake piston moves
smoothly when applying and releasing the
compressed air into the transmission case.
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ISUZU KB P190 2007

7A4–98 UNIT REPAIR (AW30–40LE)
Main Data and Specifications
General Specifications
Remaks
Model AW30–40LE
Engine 4JJ1-TC High Output (3.0L)
Type Electronic control planetary gear type
3–element 1 –stage 2 –phase type
(with lock-up mechanism)
Gear ratio 1st 2.804
2nd 1.532
3rd 1.000
4th (O/D) 0.705
Reverse 2.394
Oil used Name Exxon Mobil ATF-3309
Q'ty (l) 8.7
Torque conver ter 2300 ± 200 Stall speed (rpm)
Friction element Forward clutch C–16
Number of discs
Direct clutch C–25
OD direct clutch C–03
Second coast brake B–1 40 mm Band width or
Number of discs
Second brake B–25
Number of discs
First and reverse brake B–37
Overdrive brake B–05
Clutch One-way clutch No.1 F–12 2
Number of
sprage
One-way clutch No.2
F–22 8
OD one-way clutch F–02 4
Planetary gear Front planetary Sun gear 42
Number of teeth
Pinion gear
19
Ring gear 79
Rear planetary Sun gear 33
Pinion gear 23
Ring gear 79
O/D planetary Sun gear 33
Pinion gear 23
Ring gear 79

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ISUZU KB P190 2007