ISUZU TF SERIES 2004 Workshop Manual

UNIT REPAIR (AW30–40LE) 7A4–103
18. Remove the sleeve(31) with the plungers(32)(33),
spring(34) and washer.
Remove the two plungers(32)(33) from the sleeve.
Remove the primary regulator valve(36) from the
valve body(37).
2 44R20 006 0
Inspection and Repair
1. Inspect strainer
Inspect strainer for residual adhesive and damage,
and clean and replace as necessary.
2 44R20 005 1
2. Inspect valve springs
Check for damage, squareness, rust and distorted
coils.
Measure the spring free length and replace if less
than shown below.
mm (in)
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SpringFree
lengthColor
(1) By-pass valve21.3
(0.839 )YELLOW
(2) Steel ball20.5
(0.807 )WHITE
(3) 1–2 shift valve 30.8
(1.213 )PURPLE
(4) Low coast modulator valve30.4
(1.197 )LIGHT
GREEN
(5) Accumulator control valve33.8
(1.331)—
(6) Solenoid modulator valve 26.6
(1.047)LIGHT
BLUE
(7) Cut back valve 34.0
(1.339)DARK
BLUE
(8) Primary regulator valve38.58
(1.519)WITHE

7A4–104 UNIT REPAIR (AW30–40LE)
Reassembly
1. Install the washer(35) onto the primary regulator
valve(36).
Install the primary regulator valve(36) with the
washer(35) into the bore of lower valve body.
Install the two plungers(32)(33) into the sleeve(31).
Align the mark on the top of sleeve(31) with the
mark on the retainer(30).
Install the sleeve(31) with the two plungers(32)(33)
and spring(34) into the bore.
2 44R20 006 0
2. Install the retainer(30) by pushing the sleeve.
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NOTE: Install the retainer (30) to the same position on
the top of sleeve(31), as when disassembling.
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3. Install the cut back valve(29), spring(28) and
plug(27) into the bore.
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UNIT REPAIR (AW30–40LE) 7A4–105
4. Install the retainer(26) by pushing the plug.
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5. Install the coast modulator valve(25) and spring(24)
into the bore.
2 44R20 005 8
6. Install the retainer(23) by pushing the spring.
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7. Install the accumulator control valve(22), spring(21)
and plug(20) into the bore.
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7A4–106 UNIT REPAIR (AW30–40LE)
8. Install the retainer(19) by pushing in the plug.
2 44R20 006 9
9. Install the low coast modulator valve(18) and
spring(17) into the bore.
2 44R20 005 6
10. Install the retainer(16) by pushing the spring.
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11. Install the 1–2 shift valve(15), spring(14) and
plug(13) into the bore.
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UNIT REPAIR (AW30–40LE) 7A4–107
12. Install the retainer(12) by pushing the plug.
2 44R20 006 7
13. Install the ball(11), spring(10) and retainer (9) to the
valve body.
Torque: 6.9 N·m (60Ibin)
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14. Install the accumulator sub-assembly (8) and
clamp(7) to the valve body.
Torque: 10 N·m (87Ibin)
15. Install a new O-ring to the lock-up solenoid SL (6).
Install the solenoid to the valve body.
Torque: 10 N·m (87Ibin)16. Install a new O-ring to the shift solenoid S2 (5) and
shift solenoid S1 (4).
Install the solenoids to the valve body.
Torque: 10 N·m (87Ibin)
RUW 37A M H00 0401
E nd OFCa llou t
NOTE: Make sure six retainers are installed correctly.
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Legend
(4) Shift Solenoid S1
(5) Shift Solenoid S2
(6) Lock-up Solenoid SL
(8) Accumulator Sub-assembly
(9) Retainer

7A4–108 UNIT REPAIR (AW30–40LE)
17. Install the three strainers(3) to the valve body as
shown.
2 44R20 006 4
18. Install the spring(2) and by-pass valve(1) to the
valve body as shown.
2 44R20 006 3

UNIT REPAIR (AW30–40LE) 7A4–109
Upper Valve Body
Cross Section
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7A4–110 UNIT REPAIR (AW30–40LE)
Disassembled View
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E nd O FCallo ut
Legend
(1) Check ball
(2) Retainer
(3) Check valve NO.2
(4) Ball
(5) Check valve NO.1
(6) Retainer
(7) Check valve NO.2
(8) Ball
(9) Check valve NO.1
(10) Retainer
(11) Plug
(12) Secondary regulator valve
(13) Spring
(14) Retainer
(15) Plug
(16) Spring
(17) 2–3 shift valve(18) Retainer
(19) Plug
(20) Spring
(21) Reverse control valve
(22) Retainer
(23) Plug
(24) Second coast modulator valve
(25) Spring
(26) Retainer
(27) Plug
(28) 3–4 shift valve
(29) Spring
(30) Retainer
(31) Sleeve
(32) Plunger
(33) Spring
(34) Lock-up relay valve
(35) Upper valve body

UNIT REPAIR (AW30–40LE) 7A4–111
Disassembly
1. Remove the two types of check balls(1) from the
valve body.
Number of check ball : 11
RUW 37A SH00 480 1
NOTE: Confirm eight retainers are installed correctly.
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2. Remove the ratainer (2) for check valve.
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3. Remove the check valve NO.2(3), ball(4) and check
valve NO.1(5) from the valve body.
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7A4–112 UNIT REPAIR (AW30–40LE)
4. Remove the retainer (6) for check valve.
2 43R20 006 7
5. Remove the check valve NO.2(7), ball(8) and check
valve NO.1(9) from the valve body.
2 43R20 006 2
6. Remove the retainer (10) for secondary regulator
valve with a magnetic finger by pushing the plug.
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7. Remove the plug(11), secondary regulator valve(12)
and spring(13).
2 43R20 0056