Isuzu N-Series. Manual — part 950
7B-36 Automatic Transmission (Smoother)
5. Apply oil (Besco ATF III) to the clutch housing hole
and piston and plunger sub assembly, insert the
piston and plunger sub assembly, and position the
brake band so the plunger tip comes into contact
with the brake band support.
6. Set the spring inside the piston, install a new
gasket on the cover, and temporarily tighten the
bolt so the spring is not compressed.
7. Apply oil (Besco ATF III) to the turbine speed
sensor O-ring and clutch housing hole, and install
using the bolts.
Tighten:
9 N
⋅m (0.9 kg⋅m / 6.6 lb⋅ft)
8. Apply Besco ATF III to the outer circumference of
the oil seal and to the lip, and then use an installer
(9-8522-1269-0) and grip (5-8840-0007-0) to
press-fit the oil seal to the oil pump assembly.
9. Secure the solenoid and transmission fluid
temperature sensor harness with a bolt and new
band clip, and connect the solenoid connectors.
Pass the harness grommet through the hole and
install the solenoid and transmission fluid
temperature sensor harness.
• Make sure the solenoid and transmission fluid
temperature sensor harness wiring is not loose,
and appears as shown in the illustration below.
10. Apply Vaseline to the outer circumference of the
shaft, open the slit in the sealing, and install the
sealing.
• Take care you do not damage the sealing by
opening the slit too much. After assembly, push
the slit part inside.
11. Perform the procedure in step 10 to install the oil
pump assembly sealing at the other two points.
Legend
1. Cover
6. Piston
2. Spring
7. D-ring
3. Snap Ring
8. Gasket
4. Brake Band Support
9. Bolt
5. Plunger
N7A1052E
N7A1055E
Automatic Transmission (Smoother) 7B-37
12. Apply oil (Besco ATF III) to the thrust washer and
thrust bearing, install them in the clutch assembly.
• Take care to orient the thrust bearing correctly
(needle down, gauge up) when assembling it,
and follow the correct sequence.
13. Apply oil (Besco ATF III) to the outer circumference
of the oil pump assembly O-ring, and assemble.
14. Apply oil (Besco ATF III) to the bore of the clutch
housing, insert a bolt into the work screw hole,
assemble the hydraulic control unit, and tighten
with the bolts.
• Take care not to damage the O-ring when
aligning the clutch housing bore with the center
of the hydraulic control unit.
• Align the phase of the oil pump assembly hole
and clutch housing screw hole when
assembling.
• Take care that the solenoid and transmission
fluid temperature sensor harness does not
become pinched between components during
assembly.
Tighten:
23 N
⋅m (2.3 kg⋅m / 17 lb⋅ft)
15. Insert the solenoid and transmission fluid
temperature sensor harness grommet into the
clutch housing hole.
16. Check that the clutch assembly turbine shaft can
rotate.
17. Uniformly tighten the four bolts you temporarily
tightened in step 6.
Tighten:
23 N
⋅m (2.3 kg⋅m / 17 lb⋅ft)
18. Position the Smoother so it is level and insert the
fluid coupling tab so it engages wit the oil pump
rotor.
• Take care to avoid damage to the oil pump oil
seal.
N7A1053E
Legend
1. Bolt
2. Seal Ring
3. Seal Ring
4. Thrust Washer
5. Thrust Bearing
6. Oil Pump Assembly (Oil Control Unit)
7. O-ring
8. Oil Pump Oil Seal
N7A1054E
7B-38 Automatic Transmission (Smoother)
• Check to make sure that the gap between the
clutch housing installation surface and the fluid
coupling installation surface is no more than 31
mm.
19. Install the input shaft speed sensor.
Tighten:
9 N
⋅m (0.9 kg⋅m / 6.6 lb⋅ft)
20. Connect the sensor harness connector to the
transmission harness.
• Install the band clip.
N7A1065E
Legend
1. Reverse Switch
6. Solenoid & Transmission Fluid Temperature Sensor
2. Gear Select Position Sensor
7. 1-3-5 Shift Solenoid
3. Input Shaft Speed Sensor
8. 2-4-6-R Shift Solenoid
4. Gear Shift Position Sensor
9. Turbine Speed Sensor
5. Neutral Switch
10. Select Solenoid
N7A1051E
Automatic Transmission (Smoother) 7B-39
Tightening Torques
N7A1067E
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