2009 INFINITI QX56 oil

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 resi dual magnetism stays during disassembly.
SDIA2135E
SDIA2136E
WDIA0285E
SDIA3180E
Revision: December 20092009 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: December 20092009 QX56

TRANSFER ASSEMBLYDLN-161
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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 specificat ion, 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 specificat ion, 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 TM-26, "Control Valve"
(clutch pressure solenoid valve),
TM-26, "Control Valve"
(2-4WD solenoid valve), TM-26, "Control
Va l v e " (clutch pressure switch), TM-26, "Control Valve" (line pres-
sure switch) and TM-26, "Control Valve"
(transfer fluid temperature
sensor).
 Check the sliding faces of the control valves and plugs for abnor- mality. If any is found, replace t he 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: December 20092009 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: December 20092009 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: December 20092009 QX56

DLN-166
< DISASSEMBLY AND ASSEMBLY >[ATX14B]
TRANSFER ASSEMBLY
14. Tighten the bolts to the specified torque. Refer to
DLN-142, "Dis-
assembly and Assembly".
15. Apply ATF to the new D-rings, and install them to the clutch pis- ton.
CAUTION:
Do not reuse D-rings.
16. Install the thrust needle bearing race to the clutch piston.
17. Install the clutch piston to the center case as shown. CAUTION:
Install so the fitting protrusion of clutch piston aligns with
the dent of center case.
18. Remove all the sealant from the oil pressure check port and inside the center case.
CAUTION:
Remove old sealant adhering to mating surfaces. Also
remove any moisture, oil, or foreign material adhering to
application and mating surfaces.
19. Thread the new oil pressure check plug in 1 or 2 pitches and apply sealant to the oil pressu re check plug threads. Tighten to
the specified torque. Refer to DLN-142, "Disassembly and
Assembly".
SDIA2119E
SDIA2781E
SDIA2189E
SDIA2190E
SDIA3188E
Revision: December 20092009 QX56

TRANSFER ASSEMBLYDLN-167
< DISASSEMBLY AND ASSEMBLY > [ATX14B]
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 Use Genuine Silicone RTV or equivalent. Refer to GI-15, "Recommended Chemical Products and
Sealants".
CAUTION:
Do not reuse oil pressure check plug.
20. Install the new snap ring to the clutch hub using suitable tool. CAUTION:
Do not reuse snap ring.
21. Apply petroleum jelly to the needle bearing, and install the nee- dle bearing, spacer, clutch drum and clutch hub to the main-
shaft.
22. Install the new snap ring to the mainshaft. CAUTION:
Do not reuse snap rings.
23. Apply ATF each plate, then install them into the clutch drum as shown.
WDIA0101E
WDIA0129E
SDIA2192E
SDIA2193E
Revision: December 20092009 QX56

DLN-170
< DISASSEMBLY AND ASSEMBLY >[ATX14B]
TRANSFER ASSEMBLY
34. Apply petroleum jelly to the stem bleeder and install it to the cen-
ter case.
35. Apply ATF to the new seal ring and install it to the main oil pump cover.
CAUTION:
Do not reuse seal ring.
36. Install the inner gear and outer gear in the main oil pump hous- ing. Then, measure the side clearance. Refer to DLN-179,
"Inspection and Adjustment".
37. Install the main oil pump housing, outer gear and inner gear to the center case.
38. Install the main oil pump cover to the center case, and tighten to the specified torque. Refer to DLN-142, "Disassembly and
Assembly".
SDIA2780E
SDIA2783E
SDIA2174E
SDIA2188E
SDIA2130E
Revision: December 20092009 QX56