Isuzu KB P190. Manual - part 1041

UNIT REPAIR (AW30–40LE)

7A4–29

17. Align the spline of the front planetary gear with the

flukes of the discs and install the front planetary
gear to the forward clutch.

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18. Coat the bearing and race with petroleum jelly and

install them onto the ring gear.
Bearing and race diameter (Reference)

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19. Install the assembled direct clutch, forward clutch

and front planetary ring gear into the transmission
case.

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• Using vernier calipers, measure the distance

between the sun gear input drum and direct
clutch drum as shown in the figure.

Height: 2.5– 4.5 mm (0.098 – 0.177 in)

If the values are nonstandard, check for an
improper installation.

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Inside

Outside

Bearing

35.15 mm (1.384 in)

53.65 mm (2.112 in)

Race

35.15 mm (1.384 in)

53.65 mm (2.112 in)

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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EndOFCallout

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.

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Using 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 – 3.0mm (0.059 – 0.118in)

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

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 support

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)

7A4–32

UNIT REPAIR (AW30–40LE)

• Install and tighten the two bolts.

Torque: 25 N·m (2.5 kgf·m / 18lb·ft)

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26. Check end of output shaft.

Using a dial indicator, measure the end play of the
output shaft by hand.

End play: 0.27 – 0.86 mm (0.0106 – 0.0339 in)

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27. Install the (flat ring) 4.0 mm (0.157 in) thick flange

with the rounded edge side of the flange facing the
disc.
Alternately install four discs and four plates. (Disc
first)

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28. Install the (stepped ring) flange with the flat side of

the flange facing the disc.
Install the snap ring.
Snap ring (Reference)

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Inside diameter

167.9 mm (6.61 in)