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
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