Infiniti QX56 (Z62). Manual - part 1260

 

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Infiniti QX56 (Z62). Manual - part 1260

 

 

ST-50

< REMOVAL AND INSTALLATION >

POWER STEERING OIL PUMP

Note the following, and install in the reverse order of removal.
• When installing suction hoses (1), refer to the figure.

CAUTION:

• Never apply fluid to the hose (1) and tube (2).
• Insert hose securely until it contacts spool (A) of tube.
• Leave clearance (L) when installing clamp (3).

• When installing eye bolt (1) and copper washer (2) to oil pump (3),

refer to the figure.

CAUTION:

• Never reuse copper washer.
• Apply power steering fluid to around copper washers, then

install eye bolt.

• Install eye bolt with eye joint (assembled to high pressure

hose) (B) protrusion (A) facing with pump side cutout, and
then tighten it to the specified torque after tightening by
hand. Refer to 

ST-54, "Exploded View"

.

• Securely insert harness connector to pressure sensor.

• About the installation of drive belt. Refer to 

EM-20,

"Tension Adjustment"

.

• Check fluid level, fluid leakage and air bleeding hydraulic system after the installation. Refer to 

ST-30,

"Inspection"

.

Disassembly and Assembly

INFOID:0000000006225613

DISASSEMBLY

CAUTION:

• Fix oil pump with a vise if necessary.
• Use copper plates when fixing with a vise.

1.

Perform inspection before disassembly. Refer to 

ST-52, "Inspection"

.

2.

Remove rear cover mounting bolts, and then remove rear cover from body assembly.

3.

Remove gasket from body assembly.

4.

Remove dowel pin, cartridge and side plate from body assembly.

5.

Remove pulley mounting nut and washer, then remove pulley from drive shaft.

6.

Remove snap ring from drive shaft and press out it.

CAUTION:

When removing snap ring, be careful not to damage drive
shaft.

7.

Remove oil seal from body assembly using a suitable tool.

8.

Remove O-ring from body assembly.

9.

Remove mounting bolts of suction pipe, and then remove suc-
tion pipe and bracket from body assembly.

10. Remove connector bolt, and then remove O-ring, flow control

valve and spring from body assembly

11. Perform inspection after disassembly. Refer to 

ST-52, "Inspec-

tion"

.

ASSEMBLY

CAUTION:

• Fix oil pump with a vise if necessary.
• Use copper plates when fixing with a vise.

L

: 3 – 8 mm (0.12 – 0.31 in)

JSGIA0118ZZ

JSGIA0452ZZ

SST010B

POWER STEERING OIL PUMP

ST-51

< REMOVAL AND INSTALLATION >

C

D

E

F

H

I

J

K

L

M

A

B

ST

N

O

P

1.

Apply recommended grease to oil seal lips (1). Apply recom-
mended fluid to around oil seal. Install oil seal to body assembly,
using a drift. 

CAUTION:

Never reuse oil seal.

2.

Apply recommended fluid to drive shaft, and press drive shaft
into body assembly, then install snap ring.

CAUTION:

Never reuse snap ring.

3.

Apply recommended fluid to O-ring, and then install O-ring into
body assembly.

CAUTION:

Never reuse O-ring.

4.

Install side plate to body assembly.

5.

Install dowel pin (1) into dowel pin hole (A), and then install cam
ring (2) pointing it's D

side toward the body assembly (3) side

as shown in the figure.
• When installing cam ring, turn carved face with a letter E (B) of

it to rear cover.

CAUTION:

Do not confuse the assembling direction of cam ring. If
cam ring is installed facing the incorrect direction, it may
cause oil pump operation malfunction.

SGIA1150E

SGIA0422E

JSGIA0110ZZ

ST-52

< REMOVAL AND INSTALLATION >

POWER STEERING OIL PUMP

6.

Install rotor to body assembly.

CAUTION:

When installing rotor, turn mark face on rotor to body
assembly.

7.

Install vane to rotor so that arc of vane faces cam ring side.

8.

Check if drive shaft assembly turns smoothly.

9.

Install gasket to body assembly.

CAUTION:

Never reuse gasket.

10. Install rear cover to body assembly, and then tighten mounting

bolts to the specified torque.

11. Install pulley and washer to drive shaft, and then tighten lock nut

at the specified torque.

12. Apply recommended fluid to O-ring. Install flow control valve

spring, flow control valve and O-ring to body assembly, and then
tighten connector bolt to the specified torque.

CAUTION:

Never reuse O-ring.

13. Apply recommended fluid to O-ring, and then install O-ring to body assembly.

CAUTION:

Never reuse O-ring.

14. Install suction pipe and bracket to body assembly.

15. Perform inspection after assembly. Refer to 

ST-52, "Inspection"

.

Inspection

INFOID:0000000006225614

INSPECTION BEFORE DISASSEMBLY

Disassemble oil pump only when the following malfunctions occur.
• If oil leakage is found on oil pump.
• Oil pump pulley is damaged or deformed.
• Performance of oil pump is low. 

INSPECTION AFTER DISASSEMBLY

Body Assembly and Rear Cover Inspection

Check body assembly and rear cover for internal damage. Replace oil pump assembly if necessary.

Cartridge Assembly Inspection

Check cam ring, rotor and vane for damage. Replace oil pump assembly if necessary.

Side Plate Inspection

Check side plate for damage. Replace oil pump assembly if necessary.

Flow Control Valve Inspection

Check flow control valve and spring for damage. Replace oil pump assembly if necessary.

INSPECTION AFTER ASSEMBLY

Relief Oil Pressure

CAUTION:

Make sure that belt tension is normal before starting the following procedure.

SGIA0989E

SST843A

POWER STEERING OIL PUMP

ST-53

< REMOVAL AND INSTALLATION >

C

D

E

F

H

I

J

K

L

M

A

B

ST

N

O

P

1.

Connect the oil pressure gauge [SST: KV48103500 (J-26357)]
and the oil pressure gauge adapter [SST: KV48102500 (J-
33914)] between oil pump discharge connector and high-pres-
sure hose. Bleed air from the hydraulic circuit while opening
valve fully. Refer to 

ST-30, "Inspection"

.

2.

Start engine. Run engine until oil temperature reaches 50 to
80

°

C (122 to 176

°

F).

CAUTION:

• Leave the valve of the oil pressure gauge fully open while

starting and running engine. If engine is started with the
valve closed, the hydraulic pressure in oil pump goes up
to the relief pressure along with unusual increase of oil
temperature.

• Be sure to keep hose clear of belts and other parts when

engine is started.

3.

Fully close the oil pressure gauge valve with engine at idle and
measure the relief oil pressure.

CAUTION:

Never keep valve closed for 10 seconds or longer.

4.

Open the valve slowly after measuring. Repair oil pump if the
relief oil pressure is outside the standard. Refer to 

ST-50, "Disassembly and Assembly"

.

5.

Disconnect the oil pressure gauge from hydraulic circuit.

6.

When installing eye bolt (1) and copper washer (2) to oil pump
(3), refer to the figure.

CAUTION:

• Never reuse copper washers.
• Apply power steering fluid to around copper washer, then

install eye bolt.

• Install eye bolt with eye joint (assembled to high pressure

hose) (B) protrusion (A) facing with pump side cutout, and
then tighten it to the specified torque after tightening by
hand. Refer to 

ST-54, "Exploded View"

.

• Securely insert harness connector to pressure sensor.

7.

Check fluid level, fluid leakage and air bleeding hydraulic sys-
tem after the installation. Refer to 

ST-30, "Inspection"

.

Relief oil pressure

: Refer to 

ST-58, "Relief Oil Pres-

sure"

.

SGIA1225E

JSGIA0452ZZ

 

 

 

 

 

 

 

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