Isuzu KB P190. Manual - part 1052

UNIT REPAIR (AW30–40LE)

7A4–73

Disassembly

1. Check operation of No.1 one-way clutch

Hold the planetary sun gear and turn the second
brake hub. 
The second brake hub should turn freely clockwise
and should lock counterclockwise.

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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.

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Legend

(1) Free
(2) Lock

7A4–74

UNIT REPAIR (AW30–40LE)

Reassembly

1. Install snap ring to planetary sun gear.

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2. Place a wooden block, etc. as a work stand and

place the planetary sun gear onto it.
Install the sun gear input drum onto the planetary
sun gear.

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3. Install snap ring with snap ring pliers.

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4. Coat the two oil seal rings (metal) with ATF.

Install the two oil seal rings onto the planetary sun
gear.

NOTE:  Do not spread the ring ends too much.

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UNIT REPAIR (AW30–40LE)

7A4–75

5. Install thrust washer (plastic).

NOTE:  Make sure that the lugs fit into the holes on the
sun gear input drum.

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6. Install assembled No.1 one-way clutch and second

brake hub onto planetary sun gear as shown.

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7. Check operation of No.1 one-way clutch

Hold the planetary sun gear and turn the second
brake hub. 
The second brake hub should turn freely clockwise
and should lock counterclockwise.

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Legend

(1) Free
(2) Lock

7A4–76

UNIT REPAIR (AW30–40LE)

Second Brake Assembly (B–2)

Disassembled View

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Disassembly

1. Remove second brake assembly from output shaft.

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Legend

(1) Second brake assembly
(2) Thrust washer (Plastic)
(3) Snap ring
(4) Spring retainer

(5) Piston return spring
(6) Piston sleeve
(7) Second brake piston
(8) O-ring
(9) Second brake drum