check oil INFINITI QX56 2004 Factory Service Manual

TF-100
FRONT OIL SEAL
Revision: August 20072004 QX56
INSTALLATION
1. Install the oil seal until it is flush with the end face of the front
case, using Tool.
CAUTION:

Do not reuse oil seal.

Apply petroleum jelly to oil seal.
2. Align the matching mark of the front drive shaft with the match-
ing mark of the companion flange, then install the companion
flange.
3. Install the self-lock nut. Tighten to the specified torque, using
Tool. Refer to TF-110, "
Transfer Components" .
CAUTION:
Do not reuse self-lock nut.
4. Install the front propeller shaft. Refer to PR-4, "
Removal and
Installation" .
5. Refill the transfer with fluid and check fluid level. Refer to MA-
24, "Changing Transfer Fluid" .
6. Check the transfer for fluid leakage. Refer to MA-24, "
Checking
Transfer Fluid" . Tool number : KV38100500 ( — )
SDIA2662E
SDIA2658E
Tool number : KV40104000 ( — )
LDIA0147E

TF-102
REAR OIL SEAL
Revision: August 20072004 QX56
3. Install the dust cover to the rear case, using Tool.
CAUTION:

Do not reuse dust cover.

Apply petroleum jelly to dust cover.
4. Install the rear propeller shaft. Refer to PR-8, "
Removal and
Installation" .
5. Refill the transfer with fluid and check fluid level. Refer to MA-
24, "Changing Transfer Fluid" .
6. Check the transfer for fluid leakage. Refer to MA-24, "
Checking
Transfer Fluid" . Tool number : KV40105310 ( — )
PDIA0 116 E

TF-108
TRANSFER OIL FILTER
Revision: August 20072004 QX56
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 transfer assembly. Tighten the bolts to
the specified torque. Refer to TF-110, "
Transfer Components" .
CAUTION:

Do not damage oil filter.

Attach oil filter and tighten bolts evenly.
5. Check the transfer fluid. Refer to MA-24, "
Checking Transfer
Fluid" .
6. Start the engine for one minute. Then stop the engine and
recheck the transfer fluid.
WDIA0285E
SDIA2136E

TF-110
OVERHAUL
Revision: August 20072004 QX56
OVERHAULPFP:00000
Transfer ComponentsEDS0018X
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. Mainshaft front bearing
13. Wait detection switch 14. Check plug 15. Check spring
16. Check ball 17. Front case 18. Snap ring
19. Oil seal 20. Shift cross 21. Oil seal
22. Lock pin 23. Shift lever 24. Washer
25. Drain plug 26. Oil seal 27. Companion flange
28. Self-lock nut 29. Main shaft 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
40. Retaining plate 41. Driven plate (10 sheet) 42. Drive plate (10 sheet)
43. Return spring assembly 44. Press flange 45. Thrust needle bearing
SDIA2090E

OVERHAUL
TF-111
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: August 20072004 QX56
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. Oil seal 3. Rear case
4. Air breather 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 (7 pieces)
19. Washer 20. Filler plug 21. Filler stud
22. O-ring 23. Oil filter 24. ATP switch
25 Neutral-4LO switch 26. Oil pressure check plug 27. Harness bracket
28. Stem bleeder 29. Harness bracket 30. Center case
31. Mainshaft rear bearing 32. C-ring 33. Washer holder
34. Snap ring 35. Sub oil pump housing 36. Outer gear
37. Inner gear 38. Sub oil pump cover 39. O-ring
40. Transfer motor 41. Connector bracket
SDIA2091E

TF-118
CENTER CASE
Revision: August 20072004 QX56
10. Tap mainshaft, using suitable tool to remove it from clutch drum
and clutch hub.
11. Remove needle bearing and spacer from the mainshaft.
12. Remove the snap ring from the clutch hub.
CLUTCH PISTON
1. Remove oil pressure check plug from oil pressure check port.
2. Apply air gradually from oil pressure check port, and remove
clutch piston from center case.
SMT914C
WDIA0101E
SDIA2 115 E
SDIA2 116 E

FRONT CASE
TF-125
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: August 20072004 QX56
FRONT CASEPFP:33107
DisassemblyEDS00190
1. Remove rear case from center case. Refer to TF-112, "Disassembly" .
2. Remove the lock pin nut from the lock pin, using suitable tool.
a. Remove the lock pin.
3. Remove the oil seal from the front case, using suitable tool.
CAUTION:
Be careful not to damage the front case and shift cross.
4. Remove front case from center case.
SHIFT ROD COMPONENTS
1. Remove check plug, then check spring and check ball.
a. Remove wait detection switch.
SDIA2150E
SDIA2166E
SDIA2138E
SDIA2139E

FRONT CASE
TF-131
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: August 20072004 QX56
FRONT CASEPFP:33107
InspectionEDS00191
PLANETARY CARRIER

Measure end play of each pinion gear, and make sure the mea-
surement is within specification shown below. If out of specifica-
tion, replace planetary carrier assembly with new one.

Check working face of each gear, bearing and others for dam-
age, burrs, partial wear, dents and other abnormality. If any is
found, replace planetary carrier assembly with new one.
SUN GEAR

Check if oil passage of sun gear assembly is clogged. For this,
try to pass a 3.6 mm (0.142 in) dia. wire through oil passage as
shown.

Check sliding/contact surface of each gear, bearing and others
for damage, burrs, partial wear, dents, and other abnormality. If
any is found, replace sun gear assembly with new one.
INTERNAL GEAR

Check internal gear teeth for damage, partial wear, dents and
other abnormality. If any is found, replace internal gear with new
one.
SHIFT ROD COMPONENTS

Check working face of shift rod and fork for wear, partial wear,
bending and other abnormality. If any is found, replace with new
one.Pinion gear end play : 0.1 - 0.7 mm (0.004 - 0.028 in)
PDIA0185E
PDIA0186E
SMT008D
SMT009D

CENTER CASE
TF-133
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: August 20072004 QX56
CENTER CASEPFP:33105
InspectionEDS00192
BEARINGS
1. Make sure bearings roll freely and are free from noise, pitting
and cracks.
SUB-OIL PUMP
1. Check inner and outer circumference, tooth face, and side-face
of inner and outer gears for damage or abnormal wear.
2. Measure side clearance between sub oil pump housing edge
and inner gear/outer gear.
3. Make sure side clearance is within specification. If the measure-
ment is out of specification, replace inner and outer gears
together with new ones as a set.
MAIN OIL PUMP
1. Check inner and outer circumference, tooth face, and side-face
of inner and outer gears for damage or abnormal wear.
2. Measure side clearance between main oil pump housing edge
and inner gear/outer gear.
3. Make sure side clearance is within specification. If the measure-
ment is out of specification, replace inner and outer gears with
new ones as a set.
MAINSHAFT

Check surfaces which contact sun gear, clutch drum, clutch hub,
press flange, clutch piston, each bearing, etc. for damage, peel,
partial wear, dents, bending, or other abnormal damage. If any is
found, replace with new one.
SDIA2175E
Specification : 0.015 - 0.035 mm (0.0006 - 0.0014 in)
SDIA2173E
Specification : 0.015 - 0.035 mm (0.0006 - 0.0014 in)
SDIA2174E
SMT944C

CENTER CASE
TF-145
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: August 20072004 QX56
4. Remove all the liquid gasket from oil pressure check port and
inside center case. With the new oil pressure check plug
threaded in 1 or 2 pitches, apply specified sealant or equivalent,
to the oil pressure check plug thread of plug, and tighten. Refer
to GI-45, "
Recommended Chemical Products and Sealants" .
NOTE:
Do not reuse oil pressure check plug.
5. Install mainshaft and clutch drum. Refer to TF-145, "
MAIN-
SHAFT AND CLUTCH DRUM" .
MAINSHAFT AND CLUTCH DRUM
1. Apply ATF or petroleum jelly to needle bearing, and install nee-
dle bearing, clutch drum, clutch hub and new snap ring to main-
shaft.
2. Install new snap ring to the clutch hub, using suitable tool.
NOTE:
Do not reuse snap ring.
3. Install new snap ring to clutch hub from clutch hub to mainshaft,
and secure them with snap rings.
NOTE:
Do not reuse snap rings.Oil pressure check plug : 15 N·m (1.5 kg-m, 11 in-lb)
SMT915C
SMT974C
WDIA0101E
SDIA2192E