Isuzu KB P190. Manual - part 1056

UNIT REPAIR (AW30–40LE)

7A4–89

6. Align the teeth of the first and reverse brake piston

No.2 into the proper grooves.
Being careful not to damage the O-rings, press in
the first and reverse brake piston No.2 with No.1
into the transmission case.

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7. Place piston return spring onto first and reverse

brake piston No.2.

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8. Set special tool as shown, and compress the return

spring with special tool.
Spring compressor: 5-8840-0254-0
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.

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9. Check first and reverse brake piston movement.

Make sure the first and reverse brake piston moves
smoothly when applying and releasing the
compressed air into the transmission case.

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7A4–90

UNIT REPAIR (AW30–40LE)

10. Coat the assembled bearing and race with

petroleum jelly.
Install the assembled bearing and race facing the
bearing side upward.
Bearing and race diameter (Reference)

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Inside diameter

39.38 mm (1.550 in)

Outside diameter

58.15 mm (2.289 in)

UNIT REPAIR (AW30–40LE)

7A4–91

Transmission Case

Disassembled View

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EndOFCallout

Disassembly

1. Using a chisel, cut off the spacer and remove it from

the shaft.

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Legend

(1) Spacer
(2) Pin
(3) Manual valve lever shaft

(4) Manual valve lever
(5) Oil seal
(6) Oil seal

7A4–92

UNIT REPAIR (AW30–40LE)

2. Using a punch, drive out the pin.

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3. Pull the manual valve lever shaft out through the

case by the threads.

4. Take out the manual valve lever.

5. Using a screwdriver, remove the oil seals.

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Reassembly

1. Coat a new oil seal lip with multi purpose grease.

Using special tool, drive in the oil seal.
Oil seal installer : 5-8840-2169-0

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2. Assemble a new spacer to the manual valve lever.

3. Install the manual valve lever shaft to the

transmission case through the manual valve lever by
the threads.

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