2011 INFINITI QX56 boot

SUSPENSION ARMRSU-13
< REMOVAL AND INSTALLATION >
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SUSPENSION ARM
Exploded ViewINFOID:0000000006225670
Removal and InstallationINFOID:0000000006225671
REMOVAL
1. Remove tires with power tool. Refer to WT-64, "Removal and Installation".
2. Remove rear suspension member assembly. Refer to RSU-18, "
Removal and Installation".
3. Remove bumper rubber from frame, usi ng a socket (commercial service tool).
4. Remove suspension arm from axle housing. Refer to RAX-7, "
Removal and Installation".
5. Remove suspension arm mounting bolts, nuts, and stopper rubber from rear suspension member.
6. Remove suspension arm.
7. Perform inspection after removal. Refer to RSU-13, "
Inspection and Adjustment".
INSTALLATION
Note the following and, install in the reverse order of removal.
 Perform final tightening of rear suspension mem ber installation position (rubber bussing), under unladen
conditions with tires on level ground.
 Perform inspection after installation. Refer to RSU-13, "
Inspection and Adjustment".
 Perform adjustment after installation. (With HBMC) Refer to RSU-13, "
Inspection and Adjustment".
Inspection and AdjustmentINFOID:0000000006225672
INSPECTION AFTER REMOVAL
Appearance
Check the following items, and replace the part if necessary.
 Suspension arm and bushing for deformation, cracks or damage.
 Boot of ball joint for cracks or damage, and also for grease leakage.
Ball Joint Inspection
Manually move ball stud to confirm it moves smoothly with no binding.
Swing Torque Inspection
1. Rear suspension member 2. Stopper rubber 3. Suspension arm
4. Bumper rubber
A. To frame
Refer to GI-4, "
Components" for symbols in the figure.
JPEIB0230GB
Revision: 2010 May2011 QX56

FRONT LOWER LINKRSU-15
< REMOVAL AND INSTALLATION >
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FRONT LOWER LINK
Exploded ViewINFOID:0000000006225673
Removal and InstallationINFOID:0000000006225674
REMOVAL
1. Remove tires with power tool. Refer to WT-64, "Removal and Installation".
2. Set suitable jack under rear lower link.
3. Remove shock absorber mounting bolts from front lower link. Refer to RSU-10, "
Exploded View".
4. Remove stabilizer connecting rod. (Without HBMC) Refer to RSU-17, "
Removal and Installation".
5. Remove front lower link mounting bolts and nuts from axle housing.
6. Remove front lower link mounting bolt, nuts, stopper rubbers, eccentric disc, and adjusting bolt from rear
suspension member, and remove front lower link.
7. Perform inspection after removal. Refer to RSU-15, "
Inspection".
INSTALLATION
Note the following, and install in the reverse order of removal.
 Perform final tightening of rear suspension mem ber and axle installation position (rubber bushing), under
unladen conditions with tires on level ground.
 Perform inspection after installation. Refer to RSU-15, "
Inspection".
InspectionINFOID:0000000006225675
INSPECTION AFTER REMOVAL
Appearance
Check the following items, and replace the part if necessary.
 Front lower link and bushing for deformation, cracks or damage.
 Boot of ball joint for cracks or damage, and also for grease leakage.
Ball Joint Inspection
Manually move ball stud to confirm it moves smoothly with no binding.
Swing Torque Inspection
1. Move the ball joint at least ten times by hand to check for smooth movement.
1. Rear suspension member 2. Adjusting bolt 3. Stopper rubber
4. Front lower link 5. Eccentric disc
Refer to GI-4, "
Components" for symbols in the figure.
JPEIB0231GB
Revision: 2010 May2011 QX56

PREPARATIONST-5
< PREPARATION >
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PREPARATION
PREPARATION
Special Service ToolsINFOID:0000000006225574
The actual shapes of Kent-Moore t ools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name Description
ST27180001
(J-25726-A)
Steering wheel puller Removing steering wheel
ST3127S000
(J-25765-A)
Preload gauge Inspecting sliding torque, steering torque, and
rotating torque for ball joint
KV48103400
(—)
Preload adapter Inspecting rotating torque
KV40107300
(—)
Boot band crimping tool Installing boot band
KV48103500
(J-26357)
Oil pressure gauge Measuring oil pump relief pressure
KV48102500
(J-33914)
Oil pressure gauge adapter Measuring oil pump relief pressure
ZZA0819D
ZZA0806D
ZZA0824D
ZZA1229D
S-NT547
S-NT542
Revision: 2010 May2011 QX56

ST-30
< PERIODIC MAINTENANCE >
POWER STEERING FLUID
PERIODIC MAINTENANCE
POWER STEERING FLUID
InspectionINFOID:0000000006225597
FLUID LEVEL
1. Check fluid level with engine stopped.
2. Ensure that fluid level is between MIN and MAX.
3. Fluid levels at HOT and COLD are different. Do not confuse
them.
CAUTION:
 The fluid level should not exceed the MAX line. Excessive flui d causes fluid leakage from the
cap.
 Never reuse drained power steering fluid.
 Always use the specified fluid. Refer to MA-10, "
Fluids and Lubricants".
FLUID LEAKAGE
Check hydraulic connections for fluid leakage, cracks, damage,
looseness, or wear.
1. Run engine until the fluid temperature reaches 50 to 80 °C (122
to 176 °F) in reservoir tank, and keep engine speed idle.
2. Turn steering wheel several times from full left stop to full right stop.
3. Hold steering wheel at each lock position for five seconds and carefully, check for fluid leakage.
CAUTION:
Never hold the steering wheel in a locked position for more
than 10 seconds. (There is the possibility that power steer-
ing oil pump assembly may be damaged.)
4. If fluid leakage at connections is noticed, then loos en flare nut and then retighten. Do not overtighten con-
nector as this can damage O-ring, washer and connector.
5. If fluid leakage from oil pump is noticed, check oil pump. Refer to ST-52, "
Inspection".
6. Check steering gear boots for accumulation of fluid indicating from steering gear.
AIR BLEEDING HYDRAULIC SYSTEM
If air bleeding is not complete, the following symptoms can be observed.
 Bubbles are created in reservoir tank.
 Clicking noise can be heard from oil pump.
 Excessive buzzing in the oil pump. NOTE:
Fluid noise may occur in the steering gear or oil pump. This does not affect performance or durability of the
system.
1. Turn steering wheel several times from full left stop to full right stop with engine off. CAUTION:
Fill reservoir tank with a sufficien t amount of fluid so that fluid level is not below the MIN line while
turning steering wheel.
2. Start engine and hold steering wheel at each lock position for 3 seconds at idle to check for fluid leakage.
HOT : Fluid temperature 50 – 80
°C (122 – 176 °F)
COLD : Fluid temperature 0 – 30 °C (32 – 86 °F)
Recommended fluid : Refer to MA-10, "
Fluids
and Lubricants".
Fluid capacity : Refer to ST-57, "
General
Specifications".
SGIA0232J
SGIA0506E
Revision: 2010 May2011 QX56

STEERING SHAFTST-39
< REMOVAL AND INSTALLATION >
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- Align rear cover cap projection (A) with the marking position of gear housing assembly (B).
- Install slit part of lower joint (C) aligning with the rear cover cap projection (A). Make sure that the slit part of lower joint (C) is
aligned with rear cover cap projection (A) and the marking position
of gear housing assembly (B).
 When installing lower joint (1) to steering shaft (2), check the fixing length (A).
 Perform inspection after installation. Refer to ST-39, "
Inspection".
InspectionINFOID:0000000006225606
INSPECTION AFTER REMOVAL
Lower Joint
 Check dust boot clamp (looseness and disconnection) and dust boot (scratches, cracks, and holes).
Replace the lower joint, as necessary.
 Check each part of lower joint for damage and other malfunctions. Replace if there is a malfunction.
Steering Shaft
 Check steering shaft and hole cover seal for scratches, cracks, and holes. Replace the stee\
ring shaft or hole
cover seal, as necessary.
 Check the sliding range of the steering shaft.
CAUTION:
Check the sliding range (A) (b etween the extended position
and the contracted position) of the steering shaft.
 Check the length (L) (extended posit ion) of the steering shaft.
: Bolt
JPGIA0038ZZ
A : 15.3 mm (0.602 in)
JPGIA0068ZZ
A : Refer to ST-58, "Steering Shaft Sliding Range".
JPGIA0070ZZ
L : Refer to ST-58, "Steering Shaft Sliding Range".
JPGIA0069ZZ
Revision: 2010 May2011 QX56

ST-40
< REMOVAL AND INSTALLATION >
STEERING SHAFT
 Rotate the steering shaft to check runout of the steering shaft atthe runout measuring point ( ) by using dial indicator and V-block.
 Check each part of steering shaft for damage and other malfunc- tions. Replace if there is a malfunction.
INSPECTION AFTER INSTALLATION
 Check dust boot bellows (deformation, such as dent s). Manually rework the bellows, as necessary.
 Check if steering wheel turns smoothly when it is tur ned several times fully to the end of the left and right.
 Check the steering wheel play, neutral position steeri ng wheel, steering wheel turning force, and front wheel
turning angle. Refer to ST-32, "
Inspection".
 Adjust neutral position of steering angle sensor. Refer to BRC-64, "
Work Procedure".
Runout : Refer to
ST-58, "
Steering Shaft Sliding
Range".
A : 120 mm (4.72 in)
B : 240 mm (9.45 in)
JPGIA0075ZZ
Revision: 2010 May2011 QX56

STEERING GEAR AND LINKAGEST-41
< REMOVAL AND INSTALLATION >
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STEERING GEAR AND LINKAGE
Exploded ViewINFOID:0000000006225607
REMOVAL
DISASSEMBLY
Engine speed sensitive type
1. Steering gear assembly 2. Cotter pin
Refer to GI-4, "
Components" for symbols in the figure.
JPGIA0072GB
JPGIA0095GB
1. Outer socket 2. Boot clamp 3. Boot
4. Inner socket 5. Boot clamp 6. Gear housing assembly
7. Adjusting screw 8. Adjusting screw lock nut 9. Spring
Revision: 2010 May2011 QX56

ST-42
< REMOVAL AND INSTALLATION >
STEERING GEAR AND LINKAGE
Vehicle speed sensitive type
Removal and InstallationINFOID:0000000006225608
REMOVAL
1. Set vehicle to the straight-ahead position.
2. Remove tires.
3. Remove front final drive assembly. Refer to DLN-162, "
Removal and Installation".
10. Retainer 11. O-ring 12. Low pressure piping
13. Gear-sub assembly 14. Rear cover cap 15. Cylinder tubes
: Apply power steering fluid.
: Apply Genuine High Strength Thread Locking Sealant or equivalent. Refer to GI-22, "
Recommended Chemical Products
and Sealants".
: A p p l y G e n u i n e L i q u i d G a s k e t , T h r e e B o n d 1111 B o r e q u i v a l e n t . : Apply multi-purpose grease.
Refer to GI-4, "
Components" for symbols not described on the above.
JPGIA0073GB
1. Outer socket 2. Boot clamp 3. Boot
4. Inner socket 5. Boot clamp 6. Gear housing assembly
7. Adjusting screw 8. Adjusting screw lock nut 9. Spring
10. Retainer 11. O-ring 12. Low pressure piping
13. Power steering solenoid valve 14. Gear-sub assembly 15. Rear cover cap
16. Cylinder tubes
: Apply power steering fluid.
: Apply Genuine High Strength Thread Locking Sealant or equivalent. Refer to GI-22, "
Recommended Chemical Products
and Sealants".
: A p p l y G e n u i n e L i q u i d G a s k e t , T h r e e B o n d 1111 B o r e q u i v a l e n t . : Apply multi-purpose grease.
Refer to GI-4, "
Components" for symbols not described on the above.
Revision: 2010 May2011 QX56