Oil INFINITI QX56 2010 Factory Repair Manual

DLN-148
< DISASSEMBLY AND ASSEMBLY >[ATX14B]
TRANSFER ASSEMBLY
22. Remove the snap ring and internal gear using suitable tool.
23. Remove the front oil seal using suitable tool.
CAUTION:
Do not damage front case.
24. Remove the snap ring from the front case.
25. Remove the input bearing from the front case using Tool.
26. Remove the snap ring from the planetary carrier assembly using suitable tool.
SMT004D
SDIA2170E
SDIA2171E
Tool number : ST33200000 (J-26082)
SDIA2178E
SDIA2792E
Revision: April 20092010 QX56

TRANSFER ASSEMBLYDLN-151
< DISASSEMBLY AND ASSEMBLY > [ATX14B]
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7. Remove the bolts and main oil pump cover.
8. Remove the outer gear, inner gear and main oil pump housing from the center case.
9. Remove the seal ring from the main oil pump cover.
10. Remove the stem bleeder from the bleed hole.
11. Remove the snap ring and washer holder from the mainshaft.
SDIA2130E
SDIA2131E
SDIA2783E
SDIA2780E
SDIA2104E
Revision: April 20092010 QX56

DLN-154
< DISASSEMBLY AND ASSEMBLY >[ATX14B]
TRANSFER ASSEMBLY
22. Remove the mainshaft from the clutch drum and clutch hub
using suitable tool.
23. Remove the needle bearing and spacer from the mainshaft.
24. Remove the snap ring from the clutch hub using suitable tool.
25. Remove the oil pressure check plug from the oil pressure check port.
26. Apply air gradually from the oil pressure check port, and remove the clutch piston assembly from the center case.
27. Remove the thrust needle bearing race from the clutch piston by hooking a edge into 3 notches of the thrust needle bearing race
using suitable tool.
CAUTION:
Do not damage clutch piston or thrust needle bearing race.
SMT914C
WDIA0101E
WDIA0227E
SDIA2116E
SDIA2118E
Revision: April 20092010 QX56

TRANSFER ASSEMBLYDLN-155
< DISASSEMBLY AND ASSEMBLY > [ATX14B]
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28. Remove the two D-rings from the clutch piston.
29. Remove the mainshaft rear bearing from the center case using Tool.
30. Remove the two bolts and oil strainer.
31. Remove the two O-rings from the oil strainer.
32. Remove the snap ring. Then push the connector assembly into the center case to remove the control valve assembly.
SDIA2781E
Tool number : KV38100300 (J-25523)
SDIA2129E
SDIA2119E
SDIA2782E
SDIA2122E
Revision: April 20092010 QX56

DLN-156
< DISASSEMBLY AND ASSEMBLY >[ATX14B]
TRANSFER ASSEMBLY
33. Remove the control valve assembly bolts.
34. Remove the control valve assembly.
CAUTION:
• Do not reuse any part that has been dropped or damaged.
• Make sure valve is assembled in the proper direction.
• Do not use a magnet because residual magnetism stays
during disassembly.
35. Remove the lip seals from the center case. CAUTION:
There are two kinds of lip seals (lip seal of large inner diam-
eter: 5 pieces, lip seal of small inner diameter: 2 pieces).
Confirm the position before disassembly.
36. Remove the transfer motor bolts and motor from the center case. Then remove the O-ring from the transfer motor.
37. Remove the sub oil pump cover bolts.
38. Thread two bolts (M4 x 0.8) into the holes of sub oil pump cover as shown, and pull out to remove the sub oil pump assembly.
SDIA2121E
SDIA2123E
SDIA2133E
SDIA2134E
SMT934C
Revision: April 20092010 QX56

TRANSFER ASSEMBLYDLN-157
< DISASSEMBLY AND ASSEMBLY > [ATX14B]
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39. Remove the outer gear and inner gear from the sub oil pump housing.
40. Remove the oil filter bolts and oil filter. CAUTION:
• Do not damage center case and oil filter.
• Loosen bolts and detach oil filter evenly.
41. Remove the O-rings (1) from the oil filter (2).
42. Remove the oil filter stud from the oil filter.
43. Remove the O-ring from the oil filter stud.
Control Valve Assembly
1. Disassemble the control valve assembly with the following procedure. CAUTION:
• Do not reuse any part that has been dropped or damaged.
• Make sure valve is assembled in the proper direction.
• Do not use a magnet because residual magnetism stays during disassembly.
SDIA2135E
SDIA2136E
WDIA0285E
SDIA3180E
Revision: April 20092010 QX56

DLN-160
< DISASSEMBLY AND ASSEMBLY >[ATX14B]
TRANSFER ASSEMBLY
• Check if the oil passage of the sun gear assembly is clogged. For
this, try to pass a 3.6 mm (0.142 in) dia. pin through the oil pas-
sage as shown.
• Check the sliding and contact surface of each gear and bearing for damage, burrs, partial wear, dents, and other abnormality. If any is
found, replace the sun gear assembly with a new one.
Internal Gear
• Check the internal gear teeth for damage, partial wear, dents andother abnormality. If any is found, replace the internal gear with a
new one.
Gears and Drive Chain
• Check the gear faces and shaft for wear, cracks, damage, and sei-zure.
• Check the surfaces which contact the sun gear, clutch drum, clutch hub, press flange, clutch piston and each bearing for damage,
peel, partial wear, dents, bending, or other abnormal damage. If
any is found, replace with a new one.
Bearing
• Make sure the bearings roll freely and are free from noise, pittingand cracks.
Main Oil Pump
PDIA0186E
SMT008D
SMT944C
SDIA2175E
Revision: April 20092010 QX56

TRANSFER ASSEMBLYDLN-161
< DISASSEMBLY AND ASSEMBLY > [ATX14B]
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1. Check the inner and outer circumference, tooth face, and side- face of the inner and outer gears for damage or abnormal wear.
2. Measure the side clearance between the main oil pump housing edge and the inner and outer gears.
3. Make sure the side clearance is within specification. If the mea- surement is out of specification, replace the inner and outer
gears with new ones as a set. Refer to DLN-142, "
Disassembly
and Assembly".
Sub-oil Pump
1. Check the inner and outer circumference, tooth face, and side-face of the inner and outer gears for damage or abnormal wear.
2. Measure the side clearance between the sub oil pump housing edge and the inner and outer gears.
3. Make sure the side clearance is within specification. If the mea- surement is out of specification, replace the inner and outer
gears with new ones as a set. Refer to DLN-179, "
Inspection
and Adjustment".
Control Valve
• Check resistance between the terminals of the clutch pressure
solenoid valve, 2-4WD shift solenoid valve, clutch pressure switch,
line pressure switch and the transfer fluid temperature sensor.
Refer to DLN-57, "
Component Inspection" (clutch pressure sole-
noid valve), DLN-61, "
Component Inspection" (2-4WD solenoid
valve), DLN-73, "
Component Inspection" (clutch pressure switch),
DLN-76, "
Component Inspection" (line pressure switch) and DLN-
69, "Component Inspection" (transfer fluid temperature sensor).
• Check the sliding faces of the control valves and plugs for abnor- mality. If any is found, replace the control valve assembly with a
new one. Refer to DLN-142, "
Disassembly and Assembly".
CAUTION:
Replace control valve body together with clutch return spring
as a set. Specification : Refer to
DLN-179, "
Inspection and
Adjustment"SDIA2174E
Specification : Refer to DLN-179, "Inspection and Ad-
justment"SDIA2173E
WDIA0199E
SMT947C
Revision: April 20092010 QX56

DLN-164
< DISASSEMBLY AND ASSEMBLY >[ATX14B]
TRANSFER ASSEMBLY
1. Apply ATF to the new O-ring, and install it on the oil filter stud.
CAUTION:
Do not reuse O-rings.
2. Install the oil filter stud to the oil filter.
3. Apply ATF to the two new O-rings (1), and install them on the oil filter (2).
CAUTION:
Do not reuse O-rings.
4. Install the oil filter to the center case. Tighten the bolts to the specified torque. Refer to DLN-142, "
Disassembly and Assem-
bly".
CAUTION:
• Do not damage oil filter.
• Attach oil filter an d tighten bolts evenly.
5. Install the outer gear and inner gear into the sub oil pump hous- ing, and measure the side clearance. Refer to DLN-142, "
Disas-
sembly and Assembly".
6. Align the dowel pin hole and bolt hole of the sub oil pump assembly with the center case. Install the sub oil pump cover.
Then tighten to the specified torque. Refer to DLN-142, "
Disas-
sembly and Assembly"
SDIA3180E
WDIA0285E
SDIA2136E
SDIA2135E
SDIA2328E
Revision: April 20092010 QX56

TRANSFER ASSEMBLYDLN-165
< DISASSEMBLY AND ASSEMBLY > [ATX14B]
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7. Apply ATF to the new O-ring and install it to the transfer motor. CAUTION:
Do not reuse O-rings.
8. Fit the double-flat end of the transfer motor shaft into the slot of the sub-oil pump assembly. Then tighten to the specified torque.
Refer to DLN-142, "
Disassembly and Assembly"
CAUTION:
Be sure to install connector bracket.
9. Apply ATF to the new lip seals, and install them to the center case.
CAUTION:
• Do not reuse lip seals.
• There are 2 kinds of lip seals (lip seal of large inner diam-
eter: 5 pieces, lip seal of small inner diameter: 2 pieces).
Confirm their position for installation.
10. Install the control valve assembly to the center case, and tighten to the specified torque. Refer to DLN-142, "
Disassembly and
Assembly".
CAUTION:
• Do not reuse any part that has been dropped or damaged.
• Make sure valve is assembled in the proper direction.
• Do not use a magnet becau se residual magnetism stays
during assembly.
11. Install the connector assembly into the center case, and secure with a snap ring.
12. Apply ATF to the new O-rings, and install them on the oil strainer.
CAUTION:
Do not reuse O-rings.
13. Install the oil strainer to the control valve assembly.
SDIA2787E
SDIA2123E
SDIA2121E
SDIA2122E
SDIA2782E
Revision: April 20092010 QX56