Page 4217 of 6020

7A4–82 UNIT REPAIR (AW30–40LE)
6. Remove the one-way clutch inner race from the rearplanetary gear.
247RY00031
7. Remove the snap ring with a screwdriver.
247RY00032
8. Remove the one-way clutch with retainers from theplanetary gear.
247RY00033
9. Remove the thrust washer (plastic) from front sideof rear planetary gear.
10. Remove the thrust washer (plastic) from rear side of rear planetary gear.
11. Remove the thrust bearing and race from front side of ring gear flange.
12. Remove the snap ring from rear planetary ring gear.
13. Remove the ring gear flange from rear planetary ring gear.
14. Check disc, plate and flange. Check to see if the sliding surface of the disc, plate
and flange are worn or burnt. If necessary, replace
them.
If the lining of the disc is peeling off or discolored,
or even if parts of the printed numbers are
defaced, replace all discs.
Before assembling new discs, soak them in ATF
for at least fifteen minutes.
248RY00045
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ISUZU KB P190 2007
Page 4218 of 6020
UNIT REPAIR (AW30–40LE) 7A4–83
Reassembly
1. Install ring gear flange to the rear planetary ringgear.
2. Install snap ring to the rear planetary ring gear.
247RY00035
3. Coat the races and bearing with petroleum jelly, and install them onto the rear planetary ring gear.
Races and bearing diameter (Reference)
247RY00036
4. Coat the thrust washers (plastic) with petroleum jelly.
Install the thrust washers onto both sides of the rear
planetary gear, facing the grooved side upward.
NOTE: Make sure that the lugs fit into the cutout
portions on the rear planetary gear.
247RY00037
5. Install the one-way clutch with the flanged side facing upward onto the rear planetary gear.
247RY00038
6. Install snap ring.
247RY00039
Inside Outside
Race (A) 28.5 mm (1.122 in) 44.2 mm (1.740 in)
Bearing and
race (B) 27.7 mm (1.091 in) 44.2 mm (1.740 in)
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ISUZU KB P190 2007
Page 4219 of 6020
7A4–84 UNIT REPAIR (AW30–40LE)
7. While turning counterclockwise, install one-wayclutch inner race to rear planetary gear.
247RY00040
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.
247RY00029
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.
246RY00013
Legend
(1) Lock
(2) Free
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ISUZU KB P190 2007
Page 4220 of 6020
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.
247RY00047
11. Coat the oil seal ring with ATF and install it to the output shaft.
NOTE: Do not spread the ring ends too much.
247RY00028
12. Install output shaft into rear planetary gear assembly.
247RY00042
13. Install second brake assembly to output shaft.
246RY00014
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ISUZU KB P190 2007
Page 4221 of 6020
7A4–86 UNIT REPAIR (AW30–40LE)
First and Reverse Brake (B–3)
Disassembled View
246RY00024-X
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
Page 4222 of 6020
UNIT REPAIR (AW30–40LE) 7A4–87
Disassembly
1. Remove assembled thrust bearing and race fromtransmission case.
247RY00043
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.
246RY00016
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.
247RY00002
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.
246RY00016
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ISUZU KB P190 2007
Page 4223 of 6020

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
246RY00017
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
247RY00044
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.
246RY00018
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.
246RY00019
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ISUZU KB P190 2007
Page 4224 of 6020
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.
246RY00020
7. Place piston return spring onto first and reverse brake piston No.2.
246RY00021
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.
247RY00002
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.
246RY00022
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ISUZU KB P190 2007