2007 ISUZU KB P190 check oil

UNIT REPAIR (AW30–40LE) 7A4–41
7. Check oil pump drive gear rotation.Make sure the drive gear rotates smoothly when
installed to the torque converter.
241RY00017

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ISUZU KB P190 2007

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

7A4–50 UNIT REPAIR (AW30–40LE)
13. Install two plates and two discs then install theflange, with the flat side facing downward.
252L100013
14. Install snap ring.
252L100014
15. 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.
252L100005Using a dial indicator, measure the OD direct clutch
piston stroke by applying and releasing the
compressed air (390 – 780 kPa or 57 – 114 psi) as
shown.
Piston stroke: 1.85 – 2.15 mm (0.0729 – 0.0847 in)
If the piston stroke is not within specification,
replace the disc and recheck the piston stroke.
If the piston stroke is nonstandard, select another
flange.
Flange sizes
252L100016
Flange thickness Flange thickness
3.8 mm (0.150 in) 3.4 mm (0.134 in)
3.7 mm (0.146 in) 3.3 mm (0.130 in)
3.6 mm (0.142 in) 3.2 mm (0.126 in)
3.5 mm (0.138 in) 3.1 mm (0.122 in)

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ISUZU KB P190 2007

7A4–52 UNIT REPAIR (AW30–40LE)
OD Support Assembly
Disassembled View
RTW77AMF000301
EndOFCallout
Disassembly
1. Check OD brake piston movement.Place the OD support assembly onto the direct
clutch assembly.
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Legend
(1) Snap ring
(2) Piston return spring
(3) O-ring (4) OD brake piston
(5) OD support
(6) Oil seal ring

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ISUZU KB P190 2007

UNIT REPAIR (AW30–40LE) 7A4–53
Apply compressed air into the oil passage as
shown, and be sure that the OD brake piston moves
smoothly.
252RY00043
2. Remove the thrust bearing.
3. Remove the race.
4. Remove the thrust washer (plastic).
5. Place special tool on the spring retainer, and compress the return spring with a shop press.
Spring compressor : 5-8840-2170-0 Remove the snap ring with a screwdriver.
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6. Romove the piston return spring. 7. Place the OD support onto the direct clutch
assembly.
Hold the OD brake piston so it is not slanted and
apply compressed air into the passage to remove
the OD brake piston.
Remove the OD brake piston.
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8. Remove the O-ring and oil seal rings from OD support.
Inspection and Repair
Make necessary correction or parts replacement if wear,
damage or any abnormal conditions are found through
inspection.
1. Check piston return spring Using calipers, measure the free length of the return
spring.
Standard length: 17.2 mm (0.677 in)
252RY00046

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ISUZU KB P190 2007

UNIT REPAIR (AW30–40LE) 7A4–65
5. Place special tool on the spring retainer andcompress the return spring.
Using snap ring pliers, remove the snap ring.
Spring compressor : 5-8840-0254-0
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6. Remove the piston return spring.
7. Place the forward clutch drum onto the OD suppor t. Holding the forward clutch piston by hand, apply
compressed air to the OD support to remove the
forward clutch piston.
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8. Remove the O-rings from piston.
9. Remove the O-ring from forward clutch drum.
10. Remove the oil seal rings and thrust bearing from forward clutch drum.
Inspection and Repair
1. Check forward clutch pistonCheck that check ball is free by shaking the piston.
Check that the valve does not leak by applying
low-pressure compressed air.
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2. Check forward clutch drum bushing. Using a dial indicator, measure the inside diameter
of the forward clutch drum bushing.
Maximum inside diameter: 24.08 mm (0.948 in) If the inside diameter is greater then the maximum,
replace the forward clutch drum.
248RY00043
3. 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.

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ISUZU KB P190 2007

7A4–66 UNIT REPAIR (AW30–40LE)
Before assembling new discs, soak them in ATF
for at least fifteen minutes.
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4. Check piston return spring. Using calipers, measure the free length of the return
spring.
Standard length: 19.47 mm (0.7665 in)
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Reassembly
1. Coat the assembled thrust bearing and race with petroleum jelly and install it onto the forward clutch
drum, with the race side facing downward.
Bearing and race (Reference)
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2. Coat the three oil rings with ATF. Contract the oil seal rings as shown, and install
three oil seal rings onto the forward clutch drum.
NOTE: Do not spread the ring ends more than
necessary.
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Inside diameter 33.7 mm (1.327 in)
Outside diameter 47.8 mm (1.882 in)

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ISUZU KB P190 2007

UNIT REPAIR (AW30–40LE) 7A4–73
Disassembly
1. Check operation of No.1 one-way clutchHold the planetary sun gear and turn the second
brake hub.
The second brake hub should turn freely clockwise
and should lock counterclockwise.
RUW37ASH004601
E ndOFCallout
2. Remove the one-way clutch and second brake hub.
3. Remove the trust washer (plastic).
4. Remove two oil seal rings (metal).
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5. Remove the snap ring with snap ring pliers.
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6. Remove the sun gear input drum.
7. Remove the snap ring from planetary sun gear.
Inspection and Repair
1. Check planetary sun gear bushing Using a dial indicator, measure the inside diameter
of the planetary sun gear bushing.
Maximum inside diameter: 27.08 mm (1.066 in) If the inside diameter is greater than the maximum,
replace the planetary sun gear.
248RY00054
Legend
(1) Free
(2) Lock

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ISUZU KB P190 2007