oil INFINITI QX4 2001 Factory Service Manual

SMT897C
RemovalNBTF00731. Remove exhaust front and rear tubes. Refer to FE-8,
ªEXHAUST SYSTEMº.
2. Remove front and rear propeller shaft. Refer to PD-6,
ªRemoval and Installationº.
3. Insert plug into rear oil seal after removing propeller shaft.
IBe careful not to damage spline, sleeve yoke and rear oil
seal, when removing propeller shaft.
4. Disconnect neutral-4LO switch, front revolution sensor, ATP
switch, transfer motor and 4WD shift switch harness connec-
tors.
SMT808D
5. Remove center console and A/T control device.
6. Remove floor panel for transfer.
7. Remove upper side fixing bolt for A/T and TF.
8. Remove actuator lever from transfer outer shift lever and
remove sub-oil pump from transfer.
9. Remove remaining fixing bolt for AT and TF.
SMT899C
SMT871C
10. Remove transfer from transmission.
WARNING:
Support transfer while removing it.
SMT872C
InstallationNBTF0074ITighten bolts securing transfer.
Bolt length:
45 mm (1.77 in)
Tightening torque:
: 31 - 42 N´m (3.2 - 4.3 kg-m, 23 - 31 ft-lb)
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REMOVAL AND INSTALLATION
Removal
TF-119

Transfer ComponentsNBTF0076
SMT810D
1. Oil seal
2. Transfer cover
3. Snap ring
4. Washer
5. Snap ring
6. Main gear bearing
7. Front case
8. Check plug
9. Check spring
10. Check ball
11. Internal gear
12. Snap ring
13. Bearing race
14. Thrust needle bearing
15. Planetary carrier
16. Thrust needle bearing
17. Sun gear18. L-H sleeve
19. 2-4 sleeve
20. Radial needle bearing
21. Front revolution sensor
22. Roll pin
23. L-H fork
24. 2-4 fork
25. Shift fork spring
26. Fork guide
27. Roll pin
28. Shift rod
29. Self-lock nut
30. Companion flange
31. Oil seal
32. Drain plug
33. Wait detection switch
34. Needle bearing35. Mainshaft
36. Drive chain
37. Clutch drum
38. Clutch hub
39. Snap ring
40. Driven plate
41. Drive plate
42. Retaining plate
43. Return spring assembly
44. Press flange
45. Washer
46. Thrust needle bearing
47. Snap ring
48. Seal ring
49. Front bearing
50. Front drive shaft
51. Rear bearing
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OVERHAUL
Transfer Components
TF-121

SMT811D
55. Thrust needle bearing race
56. Clutch piston
57. D-ring
58. Lip seal
59. Oil gutter
60. Center case
61. Stem bleeder
62. Mainshaft rear bearing
63. Thrust washer
64. Speedometer drive gear
65. Snap ring
66. Rear case
67. ATP switch
68. Neutral-4LO switch69. Oil seal
70. Magnet
71. Baffle plate
72. Oil strainer
73. O-ring
74. Control valve assembly
75. Lip seal (7 pieces)
76. Filler plug
77. Inner gear
78. Outer gear
79. Oil pump housing
80. Bushing
81. Oil pump shaft
82. Oil pressure check plug83. Oil pump gasket
84. Sub-oil pump housing
85. Outer gear
86. Inner gear
87. O-ring
88. Sub-oil pump cover
89. O-ring
90. Transfer motor
91. O-ring
92. Oil filter stud
93. O-ring
94. O-ring
95. Oil filter
OVERHAUL
Transfer Components (Cont'd)
TF-122

SMT877C
Rear Case
DISASSEMBLYNBTF00771. Remove neutral-4LO switch and ATP switch.
2. Remove bolts.
SMT878C
3. Remove rear case from center case by tapping it lightly with a
plastic hammer.
SMT883C
Center Case
DISASSEMBLYNBTF00781. Remove oil pump shaft from main oil pump.
SMT884C
2. Remove stem bleeder from bleeder hole.
SMT844DB
3. Remove lock nut from companion flange.
IDo not reuse lock nut.
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DISASSEMBLY
Rear Case
TF-123

SMT900C
Front Drive Shaft and Drive ChainNBTF0078S011. Remove oil gutter from center case.
2. With front drive shaft held by one hand as shown in the figure,
tap center case with a plastic hammer to remove it with drive
chain.
IDo not tap drive chain with a plastic hammer.
SMT901CB
3. Set a puller (ST30021000) and an adapter (ST33052000).
Remove front drive shaft front bearing.
SMT902CB
4. Set the puller (ST30021000) and the adapter (ST33052000).
Remove front drive shaft rear bearing.
SMT903CA
Mainshaft and Clutch DrumNBTF0078S021. Remove mounting bolts to detach baffle plate.
SMT904C
2. Set center case to press stand. Remove mainshaft from cen-
ter case.
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DISASSEMBLY
Center Case (Cont'd)
TF-125

SMT915C
Clutch PistonNBTF0078S031. Remove oil pressure check plug from oil pressure check port.
SMT916C
2. Apply air gradually from oil pressure check port, and remove
clutch piston from center case.
SMT917C
3. Remove lip seal and D-ring from clutch piston.
IDo not reuse lip seal and D-ring.
4. Remove thrust needle bearing race from clutch piston by hook-
ing a screwdriver edge into 4 notches of thrust needle bearing
race.
Control ValveNBTF0078S04CAUTION:
IDo not reuse any part that has been dropped or damaged.
IMake sure valve is assembled in the proper direction.
IDo not use a magnet because residual magnetism stays
during disassembly.
SMT918C
1. Remove bolts, and detach oil strainer.
DISASSEMBLY
Center Case (Cont'd)
TF-128

SMT919C
2. Remove O-rings from oil strainer.
IDo not reuse O-rings.
SMT920C
3. Remove bolts for control valve.
SMT921C
4. Remove snap ring. Then push terminal assembly into center
case to remove control valve assembly.
SMT922CA
5. Remove lip seals from center case.
IDo not reuse lip seals.
IThere are two kinds of lip seals (lip seal of large inner
diameter: 5 pieces, lip seal of small inner diameter: 2
pieces). Confirm the position before disassembly.
SMT923C
6. Remove all bolts except for two.
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DISASSEMBLY
Center Case (Cont'd)
TF-129

SMT929C
Mainshaft Rear BearingNBTF0078S051. Remove mainshaft rear bearing from center case using a
remover (ST35291000) and a remover (ST30090010).
SMT930C
Main Oil PumpNBTF0078S061. Remove bolts as shown in figure to detach main oil pump.
SMT931C
2. Remove outer gear and inner gear.
SMT932C
Sub-oil PumpNBTF0078S071. Remove bolts to detach transfer motor from center case. Then
remove O-ring from the transfer motor.
IDo not reuse O-ring.
SMT933C
2. Remove sub-oil pump mounting bolts.
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DISASSEMBLY
Center Case (Cont'd)
TF-131

SMT934C
3. Thread two bolts (M4 x 0.8) into the holes of sub-oil pump as
shown in the figure, and pull out to remove sub-oil pump.
SMT935C
4. Remove oil pump gasket.
IDo not reuse gasket.
SMT936C
5. Remove sub-oil pump cover, outer gear, inner gear and O-ring
from sub-oil pump housing.
IDo not reuse O-ring.
SMT937C
Oil FilterNBTF0078S081. Remove bolts for oil filter.
SMT938C
2. Insert a screwdriver as shown in the figure to remove oil filter.
DISASSEMBLY
Center Case (Cont'd)
TF-132

SMT939C
3. Remove O-rings from oil filter.
IDo not reuse O-rings.
SMT940C
4. Remove oil filter stud.
SMT941C
5. Remove O-ring from oil filter stud.
IDo not reuse O-ring.
SMT895C
Front Case
DISASSEMBLYNBTF00791. Remove rear case from center case. Refer to TF-123.
2. Remove front case from center case.
SMT990C
Shift Rod ComponentsNBTF0079S011. Remove check plug, then check spring and check ball.
2. Remove wait detection switch.
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DISASSEMBLY
Center Case (Cont'd)
TF-133