2007 ISUZU KB P190 check oil

7A4–6 UNIT REPAIR (AW30–40LE)
Major Components (2)
Major Componets (2) and Associated Parts
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Legend(1) Converter housing
(2) Snap ring, rotor, key
(3) Speedometer shaft sleeve
(4) Speedometer drive gear
(5) Speedometer driven gear
(6) Valve body
(7) Check valve, spring, ball
(8) Spring (9) Accumulator piston (C
–0), O-ring
(10) Accumulator piston (B –0), O-ring
(11) Spring
(12) Accumulator piston (C –2), O-ring
(13) Spring
(14) Accumulator piston (B –2), O-ring
(15) Spring
(16) Oil strainer assembly
(17) Oil pan

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ISUZU KB P190 2007

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

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.
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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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UNIT REPAIR (AW30–40LE) 7A4–35
34. Install the overdrive planetary gear and direct clutch.
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35. Coat the assembled bearing and race withpetroleum jelly and install it onto the direct clutch.
Bearing and race diameter (Reference)
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36. Coat the race with petroleum jelly and install it onto the oil pump.
Race diameter (Reference)
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37. Coat the O-ring with ATF and install it around the pump body.
Place the oil pump through the input shaft, and align
the bolt holes of the pump body with the
transmission case.
Hold the input shaft, and lightly press the oil pump
body to slide the oil seal rings on the stator shaft
through the direct clutch drum.
CAUTION:
Do not push on the oil pump strongly or the oil
seal ring will stick to the direct clutch drum.
Install the seven bolts.
Torque: 22 N ·m (2.2 kgf ·m/16 lb ·ft)
38. Check input shaft rotation. Make sure the input shaft rotates smoothly.
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Inside Outside
Bearing
and race 28.9 mm (1.138 in) 50.2 mm (1.976 in)
Inside
Outside
Race 28.6 mm (1.126 in) 46.5 mm (1.831 in)

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ISUZU KB P190 2007

7A4–36 UNIT REPAIR (AW30–40LE)
Diaassembly, Inspection and
Reassembly of minor Components
NOTE: The instructions here are organized so that you
work on only one component group at a time.
This will help avoid confusion from similar-looking parts
of different subassemblies being on your workbench at
the same time.
The component groups are inspected and repaired from
the converter housing side.
As much as possible, complete the inspection, repair
and reassembly before proceeding to the next
component group. If a component group cannot be
reassembled because parts are being ordered, be sure
to keep all parts of that group in separate container
while proceeding with disassembly, inspection, repair
and reassembly of other component groups.
Recommended ATF type DEXRON III.
General Cleaning Notes:
1. All disassembled parts should be washed clean and any fluid passages and holes should be blown
through with compressed air.
2. When using compressed air to dry parts, always aim away from yourself to prevent accidentally spraying
automatic transmission fluid in your face.
3. The recommended automatic transmission fluid should be used for cleaning.
Parts Arrangement:
1. After cleaning, the parts should be arranged inproper order to allow performing inspection, repairs,
and reassembly with efficiency.
2. When disassembling a valve body, be sure to keep each valve together with the corresponding spring.
3. New brakes and clutches that are to be used for replacement must be soaked in transmission fluid
for at least thirty minutes before assembly.
General Assembly:
1. All oil seal rings, clutch discs, clutch plates, rotating parts, and sliding surfaces should be coated with
transmission fluid prior to reassembly.
2. All gaskets and rubber O-ring should be replaced.
3. Make sure that the ends of a snap ring are not aligned with one of the cutouts and are installed in
the groove correctly.
4. If a worn bushing is to be replaced, the subassembly containing that bushing must be
replaced.
5. Check thrust bearings and races for wear or damage. Replace if necessary.
6. Use petroleum jelly or vaseline to keep parts in place.

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ISUZU KB P190 2007

7A4–38 UNIT REPAIR (AW30–40LE)
2. Remove the O-ring.
3. Remove the stator shaft.
4. Remove the oil pump drive gear.
5. Remove the oil pump driven gear.
6. Remove the oil pump body. Remove 13 bolts, and then remove the stator shaft
from oil pump body.
Then remove drive and driven gear.
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Inspection and Repair
Make necessary correction or parts replacement if wear,
damage or any abnormal conditions are found through
inspection.
1. Check oil pump body bushing. Using a dial indicator, measure the inside diameter
of the oil pump body bushing.
Maximum inside diameter: 38.19 mm (1.5035 in) If the inside diameter is greater than the maximum,
replace the oil pump body.
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2. Check stator shaft bushing. Using a dial indicator, measure the inside diameter
of the stator shaft bushing.
Maximum inside diameter: Front side: 21.58 mm
(0.8496 in)
Maximum inside diameter: Rear side: 27.08 mm
(1.0661 in)
If the inside diameter is greater than the maximum,
replace the stator shaft.
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3. Check tip clearance of both gears. Measure between the gear teeth and the
cresent-shaped part of the pump body.
Standard tip clearance: 0.11 – 0.14 mm (0.0043 –
0.0055 in)
Maximum tip clearance: 0.19 mm (0.0075 in) If the tip clearance is greater than the maximum,
replace the drive gear, driven gear or pump body.
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ISUZU KB P190 2007

UNIT REPAIR (AW30–40LE) 7A4–39
4. Check body clearance of driven gear.Push the driven gear to one side of the body.
Use a feeler gauge, measure the clearance.
Standard body clearance: 0.07 – 0.15 mm (0.0028
– 0.0059 in)
Maximum body clearance: 0.2 mm (0.0079 in) If the body clearance is greater than the maximum,
replace the drive gear, driven gear or pump body.
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5. Check side clearance of both gears. Using a steel straightedge and a feeler gauge,
measure the side clearance of both gears.
Standard side clearance: 0.02 – 0.05 mm (0.0008 –
0.0020 in)
Maximum side clearance: 0.1 mm (0.004 in) If the side clearance is greater than the maximum,
replace the drive gear, driven gear or pump body.
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6. Check oil seal. Check for wear, damage or cracks.
If necessary, replace oil seal.
Pry off the oil seal with a screwdriver.
241RY00012Using special tool, install a new oil seal.
The oil seal end should be flush with the outer edge
of the pump body.
Oil seal installer : 5-8840-2256-0
Coat the oil seal lip with multipurpose grease.
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ISUZU KB P190 2007