2007 ISUZU KB P190 lock

7A4-18 UNIT REPAIR (JR405E)
CONTROL VALVE UPPER BODY

09CV02
Legend
1. Manual valve, and pin
2. Retainer plate, spring, and 2-4 brake accumulator
3. Retainer plate, plug, and low and reverse brake fail valve B
4. Retainer plate, plug, spring, and reverse stall valve
5. Retainer plate, spring, and low and reverse brake solenoid accumulator
6. Retainer plate, spring, and pilot valve
7. Retainer plate, spring, and low clutch solenoid accumulator
8. Retainer plate, plug, spring, and low clutch amp valve A


9. Retainer plate, plug, spring, and 2-4
brake fail valve B
10. Retainer plate, sleeve, plug, spring, and lock-up control valve
11. Retainer plate, plug, spring, and 2-4 brake amp valve
12. Retainer plate, plug, spring, and high clutch amp valve
13. Retainer plate, spring, and high clutch solenoid accumulator
14. Control valve upper body
15. Spring
16. Steel ball


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ISUZU KB P190 2007

UNIT REPAIR (JR405E) 7A4-21
No. Valve
nomenclature Diameter
(mm / in) Length
(mm / in) Configuration
1 Manual 12.0 /
0.472 82.0 /
3.228
2 2 – 4 brake
accumulator 15.0 /
0.591 37.5 /
1.476
3 Low and reverse
brake fail (B) 10.0 /
0.394 52.0 /
2.047
4 Reverse stall 8.0 /
0.315 50.0 /
1.969
5 Low and reverse
brake solenoid
accumulator 14.0 /
0.551 19.5 /
0.768
6 Pilot 12.0 /
0.472 38.5 /
1.516
7 Low clutch
solenoid
accumulator 14.0 /
0.551 19.5 /
0.768
8 Low clutch amp
(A) 12.0 /
0.472 53.5 /
2.106
9 2 – 4 brake fail
(B) 10.0 /
0.394 39.0 /
1.535
10 Lock-up control 12.9 /
0.508 57.5 /
2.264
11 2 – 4 brake amp 12.0 /
0.472 53.5 /
2.106

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ISUZU KB P190 2007

7A4-22 UNIT REPAIR (JR405E)
12 High clutch amp 12.0 /
0.472 53.5 /
2.106
13 High clutch
solenoid
accumulator 14.0 /
0.551 19.5 /
0.768

Spring specifications
No. Valve nomenclature Free length
(mm / in) Outside
diameter (mm / in) Linear
diameter (mm / in) Number of
coils
1 Manual ---- ---- ---- ----
2 2 – 4 brake accumulator 43.9 / 1.728 11.0 / 0.433 2.0 / 0.079 13.1
3 Low and reverse brake fail (B) 22.0 / 0.866 7.0 / 0.276 0.6 / 0.024 10.0
4 Reverse stall 31.5 / 1.240 7.0 / 0.276 1.0 / 0.039 12.8
5 Low and reverse solenoid brake
accumulator 31.4 / 1.236 9.8 / 0.386 1.3 / 0.051 9.3
6 Pilot
32.0 / 1.260 11.0 / 0.433 1.3 / 0.051 9.2
7 Low clutch solenoid accumulator 31.4 / 1.236 9.8 / 0.386 1.3 / 0.051 9.3
8 Low clutch amp (A) 23.0 / 0.906 11.0 / 0.433 0.5 / 0.020 13.2
9 2 – 4 brake fail (B) 24.8 / 0.976 8.5 / 0.335 0.9 / 0.035 7.8
10 Lock-up control 27.0 / 1.063 14.0 / 0.551 1.1 / 0.043 5.7
11 2 – 4 brake amp 23.0 / 0.906 11.0 / 0.433 0.5 / 0.020 13.2
12 High clutch amp 23.0 / 0.906 11.0 / 0.433 0.5 / 0.020 13.2
13 High clutch solenoid accumulator 31.4 / 1.236 9.8 / 0.386 1.3 / 0.051 9.3
Reassembly steps
• Coat the parts with ATF before installing them.
• Install the control valve to the upper body.
• Install the 11 steel balls and springs to the upper body.



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ISUZU KB P190 2007

UNIT REPAIR (JR405E) 7A4-23
CONTROL VALVE LOWER BODY

10CV11
Legend
1. Retainer plate, spring, and steel ball
2. Retainer plate, plug, spring, and pressure regulator valve
3. Retainer plate, spring, and high clutch accumulator
4. Retainer plate, plug, low and reverse brake fail valve A, and spring
5. Retainer plate, plug, spring, and fail valve
6. Retainer plate, plug, low and reverse brake amp valve, and spring
7. Oil pressure switch
8. Oil filter
9. Solenoid
10. Line pressure solenoid
11. Lock-up solenoid


12. Harness bracket
13. Solenoid fixing plate
14. Harness assembly
15. Retainer plate, plug, spring, and 2-4 brake fail valve A
16. Retainer plate, plug, spring, and low clutch amp valve B
17. Retainer plate, spring, and torque converter relief valve
18. Oil strainer
19. Control valve lower body
20. Retainer plate, spring, and 2-4 brake solenoid accumulator
21. Oil pressure switch


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ISUZU KB P190 2007

UNIT REPAIR (JR405E) 7A4-35
Return springs • Check the number of effective return spring coils.
If the number is less than the specified minimum, the
return spring must be replaced.
Effective return spring coils (standard): 10.2
• Measure the return spring outside diameter, free length,
and linear diameter.
If any of the measured values exceed the specified limit,
the return spring must be replaced.
Return spring measurements (standard):
Outside diameter – 8.0 mm (0.315 in)
Free length – 27.1 mm (1.067 in)
Linear diameter – 1.1 mm (0.043 in)


10R&H40

Reverse clutch piston
• Apply compressed air (390 kPa/4.0 kgf/cm
2/57 psi) to
the reverse clutch piston from the outside to the inside.
The flow of air should be blocked.


11R&H44

•
Apply compressed air (390 kPa/4.0 kgf/cm2/57 psi) to
the reverse clutch piston from inside to the outside.
The flow of air should be unrestricted.


12R&H39

Reassembly steps
Coat the parts with ATF before installing them.
1. Seal ring (high clutch)
Install new seal rings to the high clutch piston.


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ISUZU KB P190 2007

7A4-48 UNIT REPAIR (JR405E)

25C&L-SUB27

4. Side plate
Install the side plate.


26C&L-SUB26

5. Snap ring
Install the snap ring to the low clutch drum.


27C&L-SUB58

•
Attach the low one-way clutch inner race to the low
clutch drum in the opposite direction of the normal
position.
• Rotate the one-way clutch inner race clockwise. It
should turn smoothly with little resistance.
• Rotate the low one-way clutch inner race
counterclockwise.
It should immediately lock (rotation is impossible).
If it does not, check the low one-way clutch installation
direction.
Inspect and replace the low one-way clutch if required.
• Remove the low one-way clutch inner race.
• Reverse the low clutch drum.


28C&L-SUB32

6. Low clutch piston
• Install new seal rings to the low clutch piston.


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ISUZU KB P190 2007

MSG MODEL 7B-3
GENERAL DESCRIPTION


The MSG type transmission is fully synchronized 5-speed unit with blocking ring type synchronizers and a constant
mesh type reverse gear.
The unit consists principally of a case with an integral clutch housing, intermediate plate, rear cover and gears.
The top of the rear cover is a quadrant box containing the transmission control mechanism.
The case and rear cover are cast aluminum alloy to reduce weight.


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ISUZU KB P190 2007

MSG MODEL 7B-15
DISASSEMBLY
MAJOR COMPONENTS





RTW 47BLF000301

Disassembly Steps
1. Clutch shift block and release bearing
2. Clutch shift fork
3. Speedometer sensor
4. Speedometer driven gear assembly
5. Gear control box assembly

6. Front cover with oil seal



7. Counter gear snap ring

8. Bearing snap ring
9. Rear cover with oil seal
10. Transmission case
11. Intermediate plate with gear assembly



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ISUZU KB P190 2007