INFINITI QX56 2009 Factory Service Manual

SIDE OIL SEALDLN-135
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SIDE OIL SEAL
Removal and InstallationINFOID:0000000004193528
REMOVAL
1. Remove the front propeller shaft. Refer to DLN-186, "Removal and Installation".
2. Remove the companion flange. Refer to DLN-142, "Disassembly and Assembly"
.
3. Remove the transfer control device from the transfer assembly. Refer to DLN-136, "Removal and Installa-
tion".
4. Remove the side oil seal using suitable tool. CAUTION:
Do not damage shift cross.
INSTALLATION
1. Install the new side oil seal until it is flush with the end face ofcase using Tool.
CAUTION:
 Do not reuse oil seal.
 Apply petroleum jelly to oil seal.
2. Install the transfer control device to the transfer assembly. Refer to DLN-136, "Removal and Installation"
.
3. Install the companion flange. Refer to DLN-142, "Disassembly
and Assembly".
4. Install the front propeller shaft. Refer to DLN-186, "Removal and Installation"
.
SDIA2666E
Tool number : ST22360002 (J-25679-01)
SDIA2665E
Revision: December 20092009 QX56

DLN-136
< ON-VEHICLE REPAIR >[ATX14B]
TRANSFER CONTROL DEVICE
TRANSFER CONTROL DEVICE
Removal and InstallationINFOID:0000000005874980
REMOVAL
CAUTION:
Change vehicle state to AUTO, and then
remove and install transfer control device.
1. Remove front propeller shaft. Refer to DLN-186, "Removal and Installation"
.
2. Disconnect the transfer control device connector.
3. Remove transfer control lever.
4. Disconnect vacuum line.
5. Remove transfer control device.
INSTALLATION
CAUTION:
Check 4WD shift indicator after installation. Refer to DLN-121, "Precaution for Transfer Assembly and
Transfer Control Unit Replacement".
Installation is in the reverse order of removal.
1. Shift lever 2. Actuator
SDIA2654E
Revision: December 20092009 QX56

AIR BREATHER HOSEDLN-137
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AIR BREATHER HOSE
Removal and InstallationINFOID:0000000005874990
REMOVAL
INSTALLATION
CAUTION:
Make sure there are no pinched or restricted areas on each air breather hose caused by folding or
bending when installing it.
1. Install each air breather hose into the breather tube (4). Set each air breather hose with paint mark facing upward.
 A/T breather hose (1)
 Transfer breather hose (2)
 Actuator/transfer motor breather hose (3)
 Paint marks (A)
2. Install actuator/transfer motor air breather hose (1) and transfer air breather hose (2) on clip (A) with the paint mark (B) facing
upward.
 :Front
AWDIA0010ZZ
1. Breather tube 2. Clip A 3. Clip B
4. Clip C 5. Clip D 6. Actuator
7. Air breather hose clamp 8. Clip E 9. Transfer motor
10. Breather tube (transfer) Vehicle front
ALDIA0110ZZ
ALDIA0111ZZ
Revision: December 20092009 QX56

DLN-138
< ON-VEHICLE REPAIR >[ATX14B]
AIR BREATHER HOSE
3. Install clip (B) on actuator/tr
ansfer motor air breather hose (1)
and transfer air breather hose (2) with the paint mark (A)
matched.
 :Front
4. Install actuator/transfer motor air breather hose (1) and transfer air breather hose (2) on clip (B) and clip (C) with the paint mark
(A) and (D) facing upward.
 :Front
5. Install the actuator air breather hose into the actuator (case con-
nector) until the hose end reaches the base of the tube. Set
actuator air breather hose with paint mark facing leftward.
6. Install clip (B) on transfer motor air breather hose (2) and trans- fer air breather hose (1) with the paint mark (A) matched.
 :Front
7. Install the transfer air breather hose into the breather tube (transfer, metal connector) until the hose end reaches the base
of the tube. Set transfer air breather hose with paint mark facing
upwards.
AWDIA0011ZZ
AWDIA0012ZZ
SDIA3226E
AWDIA0013ZZ
SDIA3196E
Revision: December 20092009 QX56

AIR BREATHER HOSEDLN-139
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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: December 20092009 QX56

DLN-140
< ON-VEHICLE REPAIR >[ATX14B]
TRANSFER MOTOR
TRANSFER MOTOR
Removal and InstallationINFOID:0000000004193531
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: December 20092009 QX56

TRANSFER ASSEMBLYDLN-141
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REMOVAL AND INSTALLATION
TRANSFER ASSEMBLY
Removal and InstallationINFOID:0000000005874982
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 DLN-129, "Replacement"
.
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-216, "Removal and Installation (4WD)"
.
7. Position two suitable jacks under the A/T and transfer assembly.
8. Remove the crossmember. Refer to TM-216, "Removal and Installation (4WD)"
.
WARNING:
Support A/T and transfer assembly using two suitable jacks while removing crossmember.
9. Disconnect the electrical c onnectors 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: December 20092009 QX56

DLN-142
< DISASSEMBLY AND ASSEMBLY >[ATX14B]
TRANSFER ASSEMBLY
DISASSEMBLY AND ASSEMBLY
TRANSFER ASSEMBLY
Disassembly and AssemblyINFOID:0000000005874983
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: December 20092009 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 fo rk 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: December 20092009 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: December 20092009 QX56