INFINITI QX56 2008 Factory Service Manual

TRANSFER ASSEMBLYDLN-161
< DISASSEMBLY AND ASSEMBLY > [ATX14B]
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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-125, "
Removal and Installation".
CAUTION:
• Do not damage oil filter.
• Attach oil filter and 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-140, "
Dis-
assembly 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-140, "
Disas-
sembly and Assembly"
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-140, "
Disassembly and Assembly"
CAUTION:
Be sure to install connector bracket.
WDIA0285E
SDIA2136E
SDIA2135E
SDIA2328E
SDIA2787E
Revision: March 2010 2008 QX56

DLN-162
< DISASSEMBLY AND ASSEMBLY >[ATX14B]
TRANSFER ASSEMBLY
9. Assemble 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 assembly.
a. Clean the upper body (5), control valves (3) and springs (4) with cleaning agent, and dry with compressed air.
b. Dip the control valves in ATF, and apply ATF to the valve-mount- ing area of the upper body.
c. Install each control valve (3), springs (4), and plugs (2) to the upper body (5), and install retainer plates (1) to hold them in
place.
CAUTION:
• To insert control valves into upper body, place upperbody on a level surface in order to prevent flaw or dam-
age.
• Make sure each control valve is smoothly inserted.
d. Install the reverse balls, relief balls and relief springs, accumula- tor pistons and valve springs to the upper body.
e. Install the lower body and separator plate to the upper body. CAUTION:
Do not reuse separator plates.
WDIA0284E
SDIA2127E
SDIA2126E
WDIA0200E
Revision: March 2010 2008 QX56

TRANSFER ASSEMBLYDLN-163
< DISASSEMBLY AND ASSEMBLY > [ATX14B]
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f. With the lower body down, tighten the two bolts shown.
g. Apply ATF to the new O-rings, and install them to each solenoid valve, switch and terminal body.
CAUTION:
Do not reuse O-rings.
h. Install the following to the control valve assembly: • Clutch pressure solenoid valve
• Clutch pressure switch
• 2-4WD shift solenoid valve
• Line pressure switch
• Transfer fluid temperature sensor
10. 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.
11. Install the control valve assembly to the center case, and tighten to the specified torque. Refer to DLN-140, "
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.
12. Install the connector assembly into the center case, and secure with a snap ring.
13. Apply ATF to the new O-rings, and install them on the oil strainer.
CAUTION:
Do not reuse O-rings.
14. Install the oil strainer to the control valve assembly.
WDIA0198E
SDIA2123E
SDIA2121E
SDIA2122E
SDIA2782E
Revision: March 2010 2008 QX56

DLN-164
< DISASSEMBLY AND ASSEMBLY >[ATX14B]
TRANSFER ASSEMBLY
15. Tighten the bolts to the specified torque. Refer to
DLN-140, "Dis-
assembly and Assembly".
16. Apply ATF to the new D-rings, and install them to the clutch pis- ton.
CAUTION:
Do not reuse D-rings.
17. Install the thrust needle bearing race to the clutch piston.
18. 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.
19. 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.
20. 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-140, "
Disassembly and
Assembly".
SDIA2119E
SDIA2781E
SDIA2189E
SDIA2190E
SDIA3188E
Revision: March 2010 2008 QX56

TRANSFER ASSEMBLYDLN-165
< 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.
21. Install the new snap ring to the clutch hub using suitable tool. CAUTION:
Do not reuse snap ring.
22. Apply petroleum jelly to the needle bearing, and install the nee- dle bearing, spacer, clutch drum and clutch hub to the main-
shaft.
23. Install the new snap ring to the mainshaft. CAUTION:
Do not reuse snap rings.
24. Apply ATF each plate, then install them into the clutch drum as shown.
WDIA0101E
WDIA0129E
SDIA2192E
SDIA2193E
Revision: March 2010 2008 QX56

DLN-166
< DISASSEMBLY AND ASSEMBLY >[ATX14B]
TRANSFER ASSEMBLY
25. Install the return spring assembly into the clutch hub.
26. Install the press flange by aligning the notches to the clutch hub
as shown.
27. Press the press flange to install the new snap ring into snap ring groove on mainshaft using Tools.
CAUTION:
Do not reuse snap ring.
28. Install the new snap ring to the mainshaft using suitable tool. CAUTION:
Do not reuse snap ring.
29. Apply ATF to the thrust needle bearing and install it on the press flange.
SMT911C
SDIA2194E
Tool number A: ST22452000 (J-34335)
B: ST30911000 ( — )
C: KV31103300 ( — )
SDIA2111E
SDIA2112E
SDIA2109E
Revision: March 2010 2008 QX56

TRANSFER ASSEMBLYDLN-167
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30. Install the new snap ring to the main shaft. CAUTION:
Do not reuse snap ring.
31. Install the mainshaft rear bearing to the center case using Tool.
32. Install the mainshaft assembly using a press. • Press the mainshaft into the center case using Tools.
33. Install the C-rings to the mainshaft.
34. Set the washer holder on the mainshaft, and secure it with a new snap ring.
CAUTION:
Do not reuse snap ring.
SDIA2195E
Tool number : ST15310000 (J-25640-B)
SDIA2196E
Tool number A: ST30911000 ( — )
B: ST33052000 ( — )
SDIA2197E
SDIA2201E
SDIA2104E
Revision: March 2010 2008 QX56

DLN-168
< DISASSEMBLY AND ASSEMBLY >[ATX14B]
TRANSFER ASSEMBLY
35. Apply petroleum jelly to the stem bleeder and install it to the cen-
ter case.
36. Apply ATF to the new seal ring and install it to the main oil pump cover.
CAUTION:
Do not reuse seal ring.
37. Install the inner gear and outer gear in the main oil pump hous- ing. Then, measure the side clearance. Refer to DLN-177,
"Inspection and Adjustment".
38. Install the main oil pump housing, outer gear and inner gear to the center case.
39. Install the main oil pump cover to the center case, and tighten to the specified torque. Refer to DLN-140, "
Disassembly and
Assembly".
SDIA2780E
SDIA2783E
SDIA2174E
SDIA2188E
SDIA2130E
Revision: March 2010 2008 QX56

TRANSFER ASSEMBLYDLN-169
< DISASSEMBLY AND ASSEMBLY > [ATX14B]
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40. Remove all the sealant from the switch location area and inside the center case.
CAUTION:
Remove old sealant adhering to mounting surfaces. Also
remove any moisture, oil, or foreign material adhering to
application and mounting surfaces.
41. Thread the ATP switch and neutral-4LO switch in one to two pitches and apply sealant to the th reads of the switches. Tighten
to the specified torque. Refer to DLN-140, "
Disassembly and
Assembly".
• Use Genuine Silicone RTV or equivalent. Refer to GI-15,
"Recommended Chemical Products and Sealants".
NOTE:
• Neutral-4LO switch harness connector is gray.
• ATP switch harness connector is black.
42. Install the front drive shaft rear bearing using Tools.
43. Install the front drive shaft to the front bearing using Tools.
44. Install the drive chain to the front drive shaft and clutch drum. CAUTION:
Install drive chain by aligning identification marks to the
rear as shown.Tool number A: KV40100621 (J-25273)
B: ST30032000 (J-26010-01)SDIA3435E
SDIA2198E
Tool number A: KV40100621 (J-25273)B: ST30032000 (J-26010-01)
SDIA2199E
SDIA2200E
Revision: March 2010 2008 QX56

DLN-170
< DISASSEMBLY AND ASSEMBLY >[ATX14B]
TRANSFER ASSEMBLY
45. Tap the front drive shaft while keeping it upright and press-fit the
front drive shaft rear bearing.
CAUTION:
Do not tap drive chain.
46. Install the front case assembly. Refer to DLN-140, "
Disassembly
and Assembly".
47. Install the rear case assembly. Refer to DLN-140, "
Disassembly
and Assembly".
Front Case
1. Install the carrier bearing to the sun gear using Tools.
2. Install the new snap ring to the sun gear assembly using suitable
tool.
CAUTION:
Do not reuse snap ring.
3. Apply ATF to the circumference of the new metal bushing and install it to the sun gear assembly using Tool.
CAUTION:
• Do not reuse metal bushing.
• Apply ATF to metal bushing before installing.
4. Apply ATF to the new needle bearing and install it to the sun gear assembly using Tool.
CAUTION:
• Do not reuse needle bearing.
• Apply ATF to needle bear ing before installing.
SMT988C
Tool number A: ST30911000 ( — )
B: KV31103300 ( — )
SDIA2179E
SDIA2148E
Tool number : ST35300000 ( — )
Dimension A : 7.7 - 8.3 mm (0.303 - 0.327 in)
SDIA3189E
Tool number : ST33220000 ( — )
Dimension B : 62.5 - 63.1 mm (2.461 - 2.484 in)
SDIA3190E
Revision: March 2010 2008 QX56