INFINITI QX56 2010 Factory Service Manual

AIR BREATHER HOSEDLN-139
< ON-VEHICLE REPAIR > [ATX14B]
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8. Install the transfer motor air breather hose into the transfer motor (case connector) until the hose end reaches the end of
the curved section. Set transfer motor air breather hose with
paint mark facing leftward.
SDIA3194E
Revision: April 20092010 QX56

DLN-140
< ON-VEHICLE REPAIR >[ATX14B]
TRANSFER MOTOR
TRANSFER MOTOR
Removal and InstallationINFOID:0000000005148893
REMOVAL
1. Disconnect the transfer motor connector.
2. Remove the transfer motor air breather hose from the transfer
motor. Refer to DLN-137, "
Removal and Installation".
3. Remove the transfer motor bolts.
4. Remove the transfer motor.
INSTALLATION
1. Apply ATF to the new O-ring and install it to the transfer motor. CAUTION:
Do not reuse O-rings.
2. 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, "
Removal and Installation".
CAUTION:
Be sure to install connector bracket.
3. Install the transfer motor air breather hose to the transfer motor. Refer to DLN-137, "
Removal and Installation".
4. Connect the transfer motor connector.
5. Check the transfer fluid. Refer to DLN-129, "
Replacement".
6. Start the engine for one minute. Then stop the engine and recheck the transfer fluid. Refer to DLN-129,
"Inspection".
SDIA2133E
SDIA2787E
Revision: April 20092010 QX56

TRANSFER ASSEMBLYDLN-141
< REMOVAL AND INSTALLATION > [ATX14B]
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REMOVAL AND INSTALLATION
TRANSFER ASSEMBLY
Removal and InstallationINFOID:0000000005148894
REMOVAL
1. Set transfer state as 2WD when 4WD shift switch is at 2WD.
2. Remove the undercovers using power tool.
3. Drain the transfer fluid. Refer to TM-150, "
Changing the A/T Fluid (ATF)".
4. Remove the center exhaust tube and main muffler. Refer to EX-6, "
Removal and Installation".
5. Remove the front and rear propeller shafts. Refer to DLN-186, "
Removal and Installation" (front), DLN-
196, "Removal and Installation" (rear).
CAUTION:
Do not damage spline, sleeve yoke and rear oi l seal when removing rear propeller shaft.
NOTE:
Insert a plug into the rear oil seal after removing the rear propeller shaft.
6. Remove the A/T nuts from the A/T crossmember. Refer to TM-188, "
Removal and Installation (4WD)".
7. Position two suitable jacks under the A/T and transfer assembly.
8. Remove the crossmember. Refer to TM-188, "
Removal and Installation (4WD)".
WARNING:
Support A/T and transfer assembly using two suitable jacks while removing crossmember.
9. Disconnect the electrical connectors from the following: • ATP switch
• Neutral 4LO switch
• Wait detection switch
• Transfer motor
• Transfer control device
• Transfer terminal cord assembly
10. Disconnect each air breather hose from the following. Refer to DLN-137, "
Removal and Installation".
• Actuator
• Breather tube (transfer)
• Transfer motor
11. Remove the transfer control dev ice from the extension housing.
12. Remove the transfer to A/T and A/T to transfer bolts.
13. Remove the transfer assembly. WARNING:
Support transfer assembly with su itable jack while removing it.
CAUTION:
Do not damage rear oil seal (A/T).
INSTALLATION
Installation is in the reverse order of removal.
• Tighten the bolts to specification.
• Fill the transfer with new fluid and check for fluid leakage and fluid level. Refer to DLN-129, "
Replacement".
• Start the engine for one minute. Then stop the engine and recheck the transfer fluid. Refer to DLN-129, "
Inspection".
Transfer bolt torque : 36 N·m (3.7 kg-m, 27 ft-lb)
SMT872C
Revision: April 20092010 QX56

DLN-142
< DISASSEMBLY AND ASSEMBLY >[ATX14B]
TRANSFER ASSEMBLY
DISASSEMBLY AND ASSEMBLY
TRANSFER ASSEMBLY
Disassembly and AssemblyINFOID:0000000005148895
COMPONENTS
1. 2-4 sleeve
2. L-H sleeve 3. Snap ring
4. Internal gear 5. Planetary carrier assembly 6. Metal bushing
7. Needle bearing 8. Sun gear 9. Carrier bearing
10. Snap ring 11. Snap ring 12. Input bearing
13. Wait detection switch 14. Check plug 15. Check spring
16. Check ball 17. Front case 18. Snap ring
19. Input oil seal 20. Shift cross 21. Side oil seal
22. Lock pin 23. Shift lever 24. Gasket
25. Drain plug 26. Front oil seal 27. Companion flange
28. Self-lock nut 29. Mainshaft 30. Needle bearing
31. Front bearing 32. Front drive shaft 33. Rear bearing
34. Spacer 35. Drive chain 36. Clutch drum
37. Snap ring 38. Clutch hub 39. Snap ring
AWDIA0014GB
Revision: April 20092010 QX56

TRANSFER ASSEMBLYDLN-143
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40. Retaining plate 41. Driven plate (10 sheet) 42. Drive plate (10 sheet)
43. Return spring assembly 44. Press flange 45. Thrust needle bearing
46. Snap ring 47. Retaining pin 48. L-H fork
49. 2-4 fork 50. Shift fork spring 51. Fork guide
52. Retainer pin 53. Shift rod
1. Dust cover 2. Rear oil seal 3. Rear case
4. Breather tube 5. Seal ring 6. Main oil pump cover
7. Inner gear 8. Outer gear 9. Main oil pump housing
10. D-ring 11. D-ring 12. Clutch piston
13. Thrust needle bearing race 14. Oil strainer 15. O-ring
16. Snap ring 17. Control valve assembly 18. Lip seal (large 5 pieces)
19. Lip seal (small 2 pieces) 20. Gasket 21. Filler plug
22. Oil filter stud 23. O-ring 24. Oil filter
25 ATP switch 26. Neutral-4LO switch 27. Oil pressure check plug
28. Harness bracket 29. Air breather hose clamp 30. Stem bleeder
31. Harness bracket 32. Center case 33. Mainshaft rear bearing
34. C-ring 35. Washer holder 36. Snap ring
37. Sub oil pump housing 38. Outer gear 39. Inner gear
WDIA0302E
Revision: April 20092010 QX56

DLN-144
< DISASSEMBLY AND ASSEMBLY >[ATX14B]
TRANSFER ASSEMBLY
DISASSEMBLY
Rear Case
1. Remove the rear case bolts.
2. Remove the rear case from the center case.
3. Remove the dust cover using suitable tool.
4. Remove the rear oil seal using suitable tool.
CAUTION:
Do not damage rear case.
5. Remove the breather tube.
Front Case
1. Remove the rear case assembly. Refer to DLN-142, "Disassembly and Assembly".
2. Remove the lock pin nut.
40. Sub oil pump cover 41. O-ring 42. Transfer motor
43. Connector bracket A. Apply Genuine Anaerobic Liquid
Gasket, Three Bond TB1133C or
equivalent. B. Apply Genuine Liquid Gasket,
Three Bond TB1215 or equiva-
lent.
SDIA2092E
SDIA2093E
SDIA2094E
SDIA2095E
Revision: April 20092010 QX56

TRANSFER ASSEMBLYDLN-145
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3. Remove the lock pin using suitable tool.
4. Remove the shift lever.
5. Remove the side oil seal from the front case using suitable tool. CAUTION:
Do not damage front case or shift cross.
6. Remove the check plug, check spring and check ball.
7. Remove the wait detection switch.
8. Remove the self-lock nut from the companion flange using suit- able tool.
9. Put a matching mark on top of the front drive shaft thread in line with the mark on the companion flange.
CAUTION:
Use paint to make the matching mark on the front drive
shaft thread. Never damage the front drive shaft.
SDIA2150E
SDIA2166E
WDIA0196E
SDIA2841E
SDIA2779E
Revision: April 20092010 QX56

DLN-146
< DISASSEMBLY AND ASSEMBLY >[ATX14B]
TRANSFER ASSEMBLY
10. Remove the companion flange using suitable tool.
11. Remove the center case bolts, harness bracket and air breather.
12. Remove the filler plug and gasket.
13. Separate the center case from the front case. Then remove the
center case from the front case by prying it up using suitable
tool.
CAUTION:
Do not damage the mating surfaces.
14. Remove the shift rod components together with the 2-4 sleeve and L-H sleeve.
15. Remove the shift cross from the front case, using shift rod (A).
16. Remove the 2-4 sleeve and L-H sleeve from the 2-4 fork and L- H fork respectively.
WDIA0133E
SDIA2100E
SDIA2101E
AWDIA0015ZZ
SMT992C
Revision: April 20092010 QX56

TRANSFER ASSEMBLYDLN-147
< DISASSEMBLY AND ASSEMBLY > [ATX14B]
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17. Drive out the retaining pin from the shift rod using suitable tool.
18. Remove the L-H fork, 2-4 fork, shift fork spring and fork guide from the shift rod.
19. Remove the input oil seal from the front case using suitable tool. CAUTION:
Do not damage front case or sun gear.
20. Remove the snap ring from the sun gear. CAUTION:
Do not damage front case or sun gear.
21. Remove the sun gear assembly and planetary carrier assembly from the front case using Tool.
WDIA0134E
SDIA2142E
SDIA3382E
SDIA2144E
Tool number : ST35300000 ( — )
SDIA2145E
Revision: April 20092010 QX56

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