Page 4177 of 6020
7A4–42 UNIT REPAIR (AW30–40LE)
OD Planetary Gear and OD Direct Clutch Assembly (C–0)
Disassembled View
RTW77ALF000901
EndOFCallout
Legend(1) Thrust bearing
(2) OD direct clutch assembly
(3) O-ring
(4) OD direct clutch piston
(5) O-ring
(6) Piston return spring
(7) Snap ring
(8) Clutch disc
(9) Flange
(10) Snap ring (11) Thrust bearing
(12) Snap ring
(13) Ring gear flange
(14) OD planetary ring gear
(15) Thrust bearing
(16) Race
(17) OD planetary gear assembly
(18) Thrust washer
(19) OD one-way clutch
(20) Retaining plate
(21) Snap ring
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ISUZU KB P190 2007
Page 4178 of 6020
UNIT REPAIR (AW30–40LE) 7A4–43
Disassembly
1. Check operation of one-way clutch.Hold the OD direct clutch drum and turn the input
shaft.
The input shaft should turn freely clockwise and
should lock counterclockwise.
RUW37ASH004501
2. Remove OD direct clutch assembly from OD planetary gear assembly.
252L100004
3. Then remove thrust bearing with the race from ODdirect clutch drum. 4. Check piston stroke of OD direct clutch (C
–0).
Place the oil pump onto the torque converter, and
then place the OD direct clutch assembly onto the
oil pump.
252L100005Use a dial indicator, measure the OD direct clutch
piston stroke applying and releasing the
compressed air (390 – 780 kPa or 57 – 114 psi) as
shown.
Piston stroke: 1.85 – 2.15 mm (0.0728 – 0.0846 in)
252L100016
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ISUZU KB P190 2007
Page 4179 of 6020
7A4–44 UNIT REPAIR (AW30–40LE)
5. Remove snap ring from clutch drum.
252L100006
6. Remove flange, two discs and two plates.
7. Place special tool on the spring retainer and compress the return spring.
Using snap ring pliers, remove the snap ring.
Spring compressor : 5-8840-0195-0
252L100007
8. Remove piston return spring
9. Remove the OD direct clutch piston with O-ring.
Place the oil pump onto the torque converter and
then place the OD direct clutch onto the oil pump.
Holding the OD direct clutch piston by hand,
apply compressed air to the oil pump to remove
the OD direct clutch piston.
Remove the OD direct clutch piston.
252L100008
10. Remove two O –rings from piston.
11. Remove bearing and race from OD planetary ring gear.
RTW46BSH000301
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ISUZU KB P190 2007
Page 4180 of 6020
UNIT REPAIR (AW30–40LE) 7A4–45
12. Remove snap ring.
252RY00022
13. Remove ring gear flange from OD planetary ringgear.
252RY00023
14. Remove the Race. 15. Remove snap ring, using screwdriver.
252RY00024
16. Remove retaining plate from OD planetary gear.
252RY00025
17. Remove OD one-way clutch with outer race.
252RY00026
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ISUZU KB P190 2007
Page 4181 of 6020
7A4–46 UNIT REPAIR (AW30–40LE)
18. Remove the thrust washer.
Inspection and Repair
1. Check discs.Using a micrometer, measure the thickness of the
discs.
Minimum thickness: 2.04 mm (0.0803 in) If the thickness is less than the minimum, replace
the disc.
252RY00027
2. Check piston return spring Using calipers, measure the free length of the return
spring.
Standard length: 15.8 mm (0.622 in)
252RY00028
3. Check OD direct clutch piston. Check that the check ball is free by shaking the
piston. Check that the valve does not leak by
applying low-pressure compressed air.
252RY00029
4. Check OD direct clutch drum bushings. Using a dial indicator, measure the inside diameter
of the OD direct clutch drum bushings.
Maximum inside diameter: 27.11 mm (1.0673 in) If the inside diameter is greater than the maximum,
replace the OD direct clutch drum.
252L100009
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ISUZU KB P190 2007
Page 4182 of 6020
UNIT REPAIR (AW30–40LE) 7A4–47
5. Check OD planetary gear bushing.Using a dial indicator, measure the inside diameter
of replace the OD planetary gear bushing.
Maximum inside diameter: 11.27 mm (0.4437 in) If the inside diameter is greater than the maximum,
replace the OD planetary gear.
252RY00031
Reassembly
1. Install the thrust washer to the OD planetary gear, facing the grooved side upward.
252RY00032
2. Install the one-way clutch into the outer race, withthe flanged side of the one-way clutch facing
upward.
252RY00033
3. Install OD one-way clutch with outer race to overdrive planetary gear.
252RY00026
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ISUZU KB P190 2007
Page 4183 of 6020
7A4–48 UNIT REPAIR (AW30–40LE)
4. Install retaining plate, then install snap ring, using ascrewdriver.
252RY00024
5. Coat the race with petroleum jelly and install it to theplanetary gear.
Race diameter (Reference)
252RY00034
6. Install ring gear flange to OD planetary ring gear.
252RY00023
7. Install snap ring, using a screwdriver.
252RY00022
Inside diameter 24.7 mm (0.972 in)
Outside diameter 41.8 mm (1.646 in)
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ISUZU KB P190 2007
Page 4184 of 6020
UNIT REPAIR (AW30–40LE) 7A4–49
8. Install the race and bearing asm onto the ODplanetary ring gear.
Race and bearing asm diameter (Reference)
RTW37ASH001101
9. Coat new O-rings with ATF and install them on the OD direct clutch piston.
10. Being careful not to damage the O-rings, press in the OD direct clutch piston into the clutch drum,
using both hands.
252L100011
11. Install piston return spring.
252L100012
12. Place special tool on the spring retainer, and compress the return spring.
Spring compressor : 5-8840-0195-0
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.
252L100007
Inside Outside
Bearing
and race 24.2 mm (0.953 in) 47.8 mm (1.882 in)
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ISUZU KB P190 2007