2011 INFINITI QX56 Factory Service Manual

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Page 5025 of 5598

INFINITI QX56 2011 Factory Service Manual
ST-38
< REMOVAL AND INSTALLATION >
STEERING SHAFT
8. Remove the steering shaft from upper joint by sliding the steer-ing shaft (A: sliding range).
9. Remove the steering shaft and hole cover.
10. Rem

Page 5026 of 5598

INFINITI QX56 2011 Factory Service Manual
STEERING SHAFTST-39
< REMOVAL AND INSTALLATION >
C
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M A
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ST
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- Align rear cover cap projection (A) with the marking position of gear housing assembly (B).
- Install slit part of l

Page 5027 of 5598

INFINITI QX56 2011 Factory Service Manual
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

Page 5028 of 5598

INFINITI QX56 2011 Factory Service Manual
STEERING GEAR AND LINKAGEST-41
< REMOVAL AND INSTALLATION >
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STEERING GEAR AND LINKAGE
Exploded ViewINFOID:0000000006225607
REMOVAL
DISASSEMBLY
Engine speed sensitive t

Page 5029 of 5598

INFINITI QX56 2011 Factory Service Manual
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. Rem

Page 5030 of 5598

INFINITI QX56 2011 Factory Service Manual
STEERING GEAR AND LINKAGEST-43
< REMOVAL AND INSTALLATION >
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4. Remove cotter pin (1), and then loosen the nut.
5. Remove steering outer socket (2) from steering knuckl

STEERING GEAR AND LINKAGEST-43
< REMOVAL AND INSTALLATION >
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4. Remove cotter pin (1), and then loosen the nut.
5. Remove steering outer socket (2) from steering knuckle (3) so as not to damage ball joint boot (4) using suitable ball joint
remover (commercial service tool).
CAUTION:
Temporarily tighten the nut to prevent damage to threads
and to prevent the ball joint remover from suddenly coming
off.
6. Remove high pressure piping and low pressure piping of hydraulic piping, and then drain power steering fluid.
7. Remove power steering solenoid valve harness connector.
8. Remove lower joint fixing bolt (steering gear side).
9. Separate the lower joint from the steering gear assembly. Refer to ST-37, "
Exploded View".
CAUTION:
When removing lower joint, n ever insert a tool, such as a screw driver, into the yoke groove to
pull out the lower joint. In case of the violation of the above, replace lower joint with a new one.
Spiral cable may be cut if steering wheel tu rns while separating steering column assembly and
steering gear assembly. Be sure to secure st eering wheel using string to avoid turning.
10. Remove steering gear assembly.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
Spiral cable may be cut if steering wheel turns while separating steering column assembly and steer-
ing gear assembly. Be sure to secure steer ing wheel using string to avoid turning.
When installing lower joint to steering gear assembly, follow the procedure listed below.
- Set rack of steering gear in the neutral position.
NOTE:
To get the neutral position of rack, turn gear-sub a ssembly and measure the distance of inner socket, and
then measure the intermediat e position of the distance.
- 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).
Never reuse cotter pin and steering gear mounting nut.
Perform inspection after installation. Refer to ST-46, "
Inspection".
Disassembly and AssemblyINFOID:0000000006225609
DISASSEMBLY
CAUTION:
Disassemble and assemble steering gear assembly by fixing the mounting area with a vise using
copper plates.
Clean steering gear assembly with kerosene before disassembling. Be careful to avoid splashing or
applying any kerosene over connector of discharge port or return port.
1. Remove cylinder tubes from gear housing assembly.
2. Remove rear cover cap from gear-sub assembly.
PGIA0063E
: Bolt
JPGIA0038ZZ
Revision: 2010 May2011 QX56

Page 5031 of 5598

INFINITI QX56 2011 Factory Service Manual
ST-44
< REMOVAL AND INSTALLATION >
STEERING GEAR AND LINKAGE
3. Measure adjusting screw height (H), and loosen adjusting screwlock nut (1) and adjusting screw (2).
CAUTION:
Never loosen adjusting

ST-44
< REMOVAL AND INSTALLATION >
STEERING GEAR AND LINKAGE
3. Measure adjusting screw height (H), and loosen adjusting screwlock nut (1) and adjusting screw (2).
CAUTION:
Never loosen adjusting screw 2 turns or more.
Replace steering gear assembly if adjusting screw is
loosened 2 turns or more and it is removed.
4. Remove gear-sub assembly from gear housing assembly.
5. Remove O-ring from gear housing assembly.
6. Loosen outer socket lock nut, and remove outer socket.
7. Remove boot clamps, and then remove boot from inner socket. CAUTION:
Never damage inner socket and gear housing assembly when removing boot. Inner socket and
gear housing assembly must be replaced if inne r socket and gear housing assembly are damaged
because it may cause foreign material interfusion.
8. Remove inner socket from gear housing assembly.
ASSEMBLY
1. Apply recommended fluid to O-ring, and then install O-ring to gear housing assembly. CAUTION:
Never reuse O-ring.
2. Install gear-sub assembly to gear housing assembly. CAUTION:
In order to protect oil seal from any da mage, insert gear-sub assembly straightly.
3. Install inner socket to gear housing assembly with the following procedure.
a. Apply thread locking sealant into the thread of inner socket. Use Genuine High Strength Thread Locking Sealant or equivalent. Refer to GI-22, "
Recommended
Chemical Products and Sealants".
4. Screw inner socket into rack part and tighten at the specified torque.
5. Decide on the neutral position of the rack stroke (L).
6. Install rear cover cap to gear sub-assembly. CAUTION:
Make sure that the projection of rear cover cap is aligned
with the marking position of gear housing assembly.
7. Install adjusting screw with the following procedure.
a. Apply recommended sealant into the thread of adjusting screw (2) (2 turns thread), and then screw in the adjusting screw until it
reaches height (H) from gear housing assembly (3) measured
before disassembling.
Use Genuine Liquid Gasket Gasket, Three Bond 1111B or
equivalent.
b. Tighten the adjusting screw lock nut (1) to the specified torque.
8. Move rack assembly 10 strokes throughout the full stroke so that the parts can fit with each other.
9. Adjust pinion rotating torque with the following procedure.
3 : Gear housing assembly
JPGIA0065ZZ
L : Refer to ST-58, "Rack Stroke".
SGIA0877E
JPGIA0065ZZ
Revision: 2010 May2011 QX56

Page 5032 of 5598

INFINITI QX56 2011 Factory Service Manual
STEERING GEAR AND LINKAGEST-45
< REMOVAL AND INSTALLATION >
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a. Measure pinion rotating torque within ±180 ° of neutral position
of the rack assembly using Tools. St

STEERING GEAR AND LINKAGEST-45
< REMOVAL AND INSTALLATION >
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a. Measure pinion rotating torque within ±180 ° of neutral position
of the rack assembly using Tools. Stop the gear at the point
where highest torque is read.
b. Loosen adjusting screw lock nut and adjusting screw and then retighten to 5.4 N·m (0.55 kg-m, 48 in-lb), and then loosen by 20
to 40 °.
c. Measure pinion rotating torque using tools to make sure that the measured value is within the standard. Readjust if the value is
outside the standard. Replace steering gear assembly, if the
value is outside the standard after readjusting, or adjusting
screw rotating torque is 5 N·m (0.51 kg-m, 44 in-lb) or less.
d. Apply thread locking sealant to inner socket and turn pinion fully to left with inner socket installed to gear housing assembly.
e. Install dial gauge at 5 mm (0.20 in) (L) from the edge of gear housing assembly (1), and tooth point.
f. Measure vertical movement of rack assembly when pinion is turned clockwise with torque of 19.6 N·m (2.0 kg-m, 14 ft-lb).
Readjust adjusting screw angle if the measured value is outside
the standard.
If reading is outside of the specification, readjust screw angle
with adjusting screw.
CAUTION:
If reading is still outside of sp ecification, or if the rotating torque of adjusting screw is less
than 5 N·m (0.51 kg-m, 44 in-lb), replace steering gear assembly.
Never turn adjusting scr ew more than twice.
Replace steering gear assembly when adjusting screw is removed or turned more than twice.
A: Preload gauge [SST: ST3127S000 (J-25765-A)]
B: Preload adapter [SST: KV48103400 ( — )]
SGIA1383E
Pinion rotating torque (engine speed sensitive type)
Around neutral position
(within ±100 °) average “A” : 1.16 – 1.31 N·m (0.12 –
0.13 kg-m, 10.3 – 11.5 in-lb)
Maximum variation “B” : 1.43 N·m (0.15 kg-m, 13 in-lb)
Pinion rotating torque (veh icle speed sensitive type)
Around neutral position
(within ±100 °) average “A” : 1.10 – 1.41 N·m (0.12 –
0.14 kg-m, 10 – 12 in-lb)
Maximum variation “B” : 1.43 N·m (0.15 kg-m, 13 in-lb)
Vertical movement : 0.265 mm (0.0104 in)
PGIA0084E
JSGIA0104ZZ
Revision: 2010 May2011 QX56

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