Isuzu KB P190. Manual - part 1046

UNIT REPAIR (AW30–40LE)

7A4–49

8. Install the race and bearing asm onto the OD

planetary 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

24.2mm (0.953in)

47.8mm (1.882in)

7A4–50

UNIT REPAIR (AW30–40LE)

13. Install two plates and two discs then install the

flange, 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.

252L100005

Using 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 – 0.0847in)

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

3.8mm (0.150in)

3.4mm (0.134in)

3.7mm (0.146in)

3.3mm (0.130in)

3.6mm (0.142in)

3.2mm (0.126in)

3.5mm (0.138in)

3.1mm (0.122in)

UNIT REPAIR (AW30–40LE)

7A4–51

16. Coat the assembled bearing and race with

petroleum jelly and install it with the race side facing
downward.
Bearing and race (Reference)

252L100015

17. Align the flukes of discs in the direct clutch.

Install the OD direct clutch assembly onto the OD
planetary gear.

252L100004

18. 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

EndOFCallout

Inside diameter

28.9 mm (1.138in)

Outside diameter

50.2 mm (1.976in)

Legend

(1) Free
(2) Lock

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.

252RY00042

Legend

(1) Snap ring
(2) Piston return spring
(3) O-ring

(4) OD brake piston
(5) OD support
(6) Oil seal ring