2011 INFINITI QX56 oil pump

ST-2
STEERING WHEEL ...........................................33
Exploded View ..................................................... ...33
Removal and Installation ........................................33
STEERING COLUMN ........................................34
Exploded View ..................................................... ...34
Removal and Installation ........................................34
Inspection ...............................................................35
STEERING SHAFT ............................................37
Exploded View ..................................................... ...37
Removal and Installation ........................................37
Inspection ...............................................................39
STEERING GEAR AND LINKAGE ....................41
Exploded View ..................................................... ...41
Removal and Installation ........................................42
Disassembly and Assembly ....................................43
Inspection ...............................................................46
POWER STEERING OIL PUMP ........................48
Exploded View ..................................................... ...48
Removal and Installation ........................................49
Disassembly and Assembly ....................................50
Inspection ...............................................................52
HYDRAULIC LINE .......................................... ...54
Exploded View ..................................................... ...54
HEATED STEERING WHEEL SWITCH ............56
Exploded View ..................................................... ...56
Removal and Installation .........................................56
SERVICE DATA AND SPECIFICATIONS
(SDS) .......... ................................................
57
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ...
57
General Specifications ......................................... ...57
Steering Wheel Axial End Play and Play ................57
Steering Wheel Turning Force ................................57
Steering Angle ........................................................57
Steering Column Length .........................................57
Steering Column Mounting Dimensions ..................57
Steering Column Operating Range .........................57
Steering Shaft Sliding Range ..................................58
Rack Sliding Force ..................................................58
Rack Stroke ............................................................58
Socket Swing Force and Rotating Torque ..............58
Socket Axial End Play .............................................58
Inner Socket Length ................................................58
Relief Oil Pressure ..................................................58
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-6
< PREPARATION >
PREPARATION
Commercial Service Tools
INFOID:0000000006225575
Tool name Description
Power tool Loosening bolts and nuts
Ball joint remover Remove steering outer socket
Drift
a: 35 mm (1.38 in) dia.
b: 21 mm (0.83 in) dia. Installing oil pump oil seal
PBIC0190E
S-NT146
S-NT474
Revision: 2010 May2011 QX56

ST-14
< BASIC INSPECTION >
STEERING WHEEL
STEERING WHEEL
InspectionINFOID:0000000006225584
NEUTRAL POSITION STEERING WHEEL
1. Check that steering gear assembly, steering column assembly and steering wheel are installed in the cor-
rect position.
2. Perform neutral position inspection after wheel alignment. Refer to FSU-7, "
Inspection".
3. Set vehicle to the straight-ahead position and c onfirm steering wheel is in the neutral position.
4. Loosen outer socket lock nut and turn inner socket to left and right equally to make fine adjustments if steering wheel is not in the neutral position.
STEERING WHEEL TURNING FORCE
1. Park vehicle on a level and dry surface, set parking brake.
2. Tires need to be inflated the specified pressure. Refer to WT-69, "
Tire Air Pressure".
3. Start the engine.
4. Bring power steering fluid up to adequate operating temperature.
5. Check steering wheel turning force when steering wheel has been turned 540 ° from neutral position.
NOTE:
Multiply the distance (L) from the hook of spring balance to the
center of steering wheel by the measurement value with a spring
balance.
6. If steering wheel turning force is out of the specification, check
rack sliding force and relief hydraulic pressure of oil pump.
Regarding relief hydraulic pressure of oil pump, refer to ST-52, "
Inspection".
RACK SLIDING FORCE
1. Disconnect lower joint and steering knuckle from steering gear assembly. Refer to ST-41, "Exploded
View".
2. Start and run engine at idle to make sure steer ing fluid has reached normal operating temperature.
3. While pulling outer socket slowly in ±11.5 mm ( ±0.453 in) range
from neutral position, make sure rack sliding force is within
specification.
4. If rack sliding force is not within specification, overhaul steering gear assembly.
FRONT WHEEL TURNING ANGLE
1. Check front wheel turning angle after toe-in inspection. Refer to FSU-7, "Inspection".
Fluid temperature : 50 – 80
°C (122 – 176 °F)
Steering wheel turning
force : Refer to
ST-57, "
Steering
Wheel Turning Force".
JSGIA0027ZZ
Fluid temperature : 50 – 80 °C (122 – 176 °F)
Rack sliding force : Refer to ST-58, "
Rack
Sliding Force".
SST090B
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

POWER STEERING FLUIDST-31
< PERIODIC MAINTENANCE >
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3. Repeat step 2 above several times at approximately 3 seconds intervals. CAUTION:
Never hold the steering wheel in a locked positio n for more than 10 seconds. (There is the possi-
bility that oil pump may be damaged.)
4. Check fluid for bubbles and while contamination.
5. Stop engine if bubbles and white contamination do not drain out. Perform step 2 and 3 above after waiting
until bubbles and white contamination drain out.
6. Stop the engine, and then check fluid level.
Revision: 2010 May2011 QX56

ST-48
< REMOVAL AND INSTALLATION >
POWER STEERING OIL PUMP
POWER STEERING OIL PUMP
Exploded ViewINFOID:0000000006225611
REMOVAL
DISASSEMBLY
1. Power steering oil pump 2. Bracket: Vehicle front
Refer to GI-4, "
Components" for symbols in the figure.
JPGIA0031GB
Revision: 2010 May2011 QX56

POWER STEERING OIL PUMPST-49
< REMOVAL AND INSTALLATION >
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Removal and InstallationINFOID:0000000006225612
REMOVAL
1. Drain power steering fluid from reservoir tank. CAUTION:
 Never reuse drained power steering fluid.
 Always use the specified fluid. Refer to MA-10, "
Fluids and Lubricants".
2. Remove the reservoir tank. Refer to CO-13, "
Removal and Installation".
3. Remove the battery and battery tray from vehicle. Refer to PG-164, "
Removal and Installation".
4. Loosen drive belt. Refer to EM-20, "
Removal and Installation".
5. Remove drive belt from oil pump pulley.
6. Remove copper washers and eye bolt (drain fluid from their pipings).
7. Remove suction hose (drain fluid from their pipings).
8. Remove oil pump mounting bolts, and then remove oil pump.
INSTALLATION
1. Pulley 2. Snap ring 3. Drive shaft assembly
4. Oil seal 5. Body assembly 6. Suction pipe
7. O-ring 8. Side plate 9. Vane
10. Rotor 11. Cam ring 12. Cartridge
13. Dowel pin 14. Gasket 15. Rear cover
16. Flow control valve spring 17. Flow control valve 18. Connector bolt
19. Bracket
: Replace the parts as a set.
A. Oil seal lip
: Apply power steering fluid.: Apply multi-purpose grease.
Refer to GI-4, "
Components" for symbols not described on the above.
JPGIA0032GB
Revision: 2010 May2011 QX56