2007 ISUZU KB P190 oil

UNIT REPAIR (AW30–40LE) 7A4–11
5. Install the second brake drum gasket. Install a new second brake drum gasket to the
transmission case.
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6. Individual piston operation inspection. Check for the sound of operation while injecting
compressed air into the oil hole indicated in the
figure.
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NOTE: When inspecting the direct clutch, check with
the C –0 accumulator piston hole closed. If there is no
noise, disassemble and check the condition of the parts. 7. Install the accumulator pistons.
 Coat the O –ring with ATF and install it to the
piston.
Install the three springs and four accumulator
pistons to the bore as shown in th figure.
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mm (in)
Legend (1) OD direct clutch
(2) Direct clutch
(3) Forward clutch
(4) OD brake
(5) Second coast brake
(6) Second brake
(7) First and reverse brake
(A) C –0 Accumulator piston hole
Piston Outer diameter Height
B –2 36.8 mm (1.449 in) 62.5 mm (2.461 in)
C –2 36.8 mm (1.449 in) 56.6 mm (2.228 in)
B –0 31.8 mm (1.252 in) 52.0 mm (2.047 in)
C –0 29.8 mm (1.173 in) 44.0 mm (1.732 in)
Spring Free length Outer diameterColor
B –2 75.8 (2.984) 20.1 (0.791) PURPLE
C –2
(Outer) 64.0 (2.520) 20.3 (0.799) WHITE&
PINK
C –2 (Inner) 42.1 (1.657) 14.7 (0.579) PINK
B –0 62.0 (2.441) 16.0 (0.630) GREEN
C –0
(Outer) 74.6 (2.937) 20.9 (0.823) ORANGE
C –0 (Inner) 46.0 (1.811) 14.0 (0.551) YELLOW

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ISUZU KB P190 2007

UNIT REPAIR (AW30–40LE) 7A4–13
10. Install the solenoid wiring.Coat a new O-ring with ATF, and install it to the
solenoid wiring.
Insert the solenoid wiring to the case and install the
stopper plate.
Connect the connectors to the solenoid S1 (1), S2
(2), lock-up solenoid (3), and pressure control
solenoid (4).
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11. Install a new oil strainer assembly with gaskets.
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 Install the oil strainer with the gaskets to the valve
body. Tighten the four bolts.
Torque: 10 N ·m (1.0 kgf ·m/87 lb ·in)
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ISUZU KB P190 2007

7A4–14 UNIT REPAIR (AW30–40LE)
12. Install the oil pan.Install two magnets in oil pan.
Remove any gasket material and be careful not to
drop oil on the contacting surfaces of the
transmission case and oil pan.
Apply liquid gasket (TB1281 or its equivalent) to the
oil pan as shown in the figure.
NOTE: Install the oil pan as soon as the seal gasket is
applied.
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 Install and tighten the nineteen bolts.
Torque: 7.4 N ·m (0.75 kgf ·m/65 lb ·in)
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ISUZU KB P190 2007

UNIT REPAIR (AW30–40LE) 7A4–15
Major Components (3)
Major Components (3) and Associated Parts
RTW77ALF001801
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Legend(1) Oil pump
(2) Race
(3) OD planetary gear and OD direct clutch
(4) Race
(5) OD planetary ring gear
(6) Snap ring
(7) Flange, plate and disc (B –0)
(8) Bearing and race
(9) Snap ring
(10) OD support
(11) Race
(12) Snap ring
(13) Second coast brake piston assembly
(14) Direct clutch and forward clutch (15) E-ring and pin
(16) Second coast brake band
(17) Front planetary ring gear
(18) Bearing and race
(19) Race
(20) Snap ring
(21) Front planetary gear
(22) Drum and one-way clutch
(23) Snap ring
(24) Flange, plate and disc (B –2)
(25) Snap ring
(26) Rear planetary gear, second brake drum and output shaft
(27) Bearing

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ISUZU KB P190 2007

7A4–16 UNIT REPAIR (AW30–40LE)
Disassembly
1. Remove seven bolts fixing the oil pump to thetransmission case.
Remove the oil pump.
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2. Remove race from oil pump.
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3. Remove the overdrive planetary gear and overdrive direct clutch with thrust needle bearing from the
transmission case.
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4. Remove the race from OD planetary gear.
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ISUZU KB P190 2007

7A4–20 UNIT REPAIR (AW30–40LE)
14. Using snap ring pliers, remove the snap ring.
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15. Applying compressed air to the oil hole, remove thesecond coast brake piston assembly.
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16. Remove the direct clutch and forward clutch fromthe transmission case.
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17. Remove the E-ring from the pin.Remove the pin from the brake band.
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ISUZU KB P190 2007

7A4–30 UNIT REPAIR (AW30–40LE)
Coat the assembled bearing and race with
petroleum jelly and install it onto the forward
clutch.
Assembled bearing and race diameter
(Reference)
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20. Assembly second coast brake piston assembly. Coat the oil seal ring with ATF and install it to the
second coast brake piston.
Install the washer, spring and piston to the piston
rod. Install the E-ring.
RUW37ASH004401
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21. Coat two new oil seals with ATF and install them to the piston cover.
Install the spring, second coast brake piston
assembly and piston cover to the transmission
case.
Using snap ring pliers, install the snap ring.
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22. Check piston stroke of second coast brake Place a mark on the second coast brake piston rod
as shown in the figure.
248RY00005Using wire gauge, measure the stroke by applying
the compressed air (390 – 780 kPa or 57 – 114 psi)
as shown in the figure.
Piston stroke: 1.5 – 3.0 mm (0.059 – 0.118 in)
Inside
Outside
Bearing
and race 33.7 mm (1.33 in) 47.8 mm (1.88 in)
Legend (1) Second coast brake piston
(2) Oil seal
(3) Piston rod

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ISUZU KB P190 2007

UNIT REPAIR (AW30–40LE) 7A4–31
If the values are nonstandard, check for an improper
installation.
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23. Coat the race with petroleum jelly and install it onto the overdrive support assembly.
Race diameter (Reference)
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24. Aim the bolt and oil holes of the overdrive suppor t toward the valve hole side, and align them with the
bolt hole of the transmission case and insert the
overdrive support.
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25. Using snap ring pliers, install the snap ring as shown in the figure.
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Inside Outside
Race 36.7 mm (1.44 in) 50.8 mm (2.00 in)

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ISUZU KB P190 2007