Infiniti Q45. Manual — part 750
POWER STEERING GEAR
PS-17
C
D
E
F
H
I
J
K
L
M
A
B
PS
Disassembly and Assembly
NGS0002W
COMPONENT
1.
Power steering solenoid valve
2.
O-ring
3.
Rear cover cap
4.
Gear sub-assembly
5.
O-ring
6.
Retainer
7.
Spring
8.
Adjusting screw
9.
Lock nut
10. Copper washer
11.
Cylinder tube
12. Gear housing assembly
13. Rack oil seal
14. Rack assembly
15. Rack Teflon ring
16. O-ring
17. End cover assembly
18. Spacer ring
19. Lock plate
20. Inner socket
21. Boot clamp
22. Boot
23. Boot clamp
24. Outer socket
Refer to
and the followings for the symbols in the figure.
: Apply Genuine Nissan PSF or equivalent.
1: Apply Genuine High Strength Thread Locking Sealant or equivalent. Refer to
GI-45, "Recommended Chemical Products
2: Apply Genuine Silicone RTV or equivalent. Refer to
GI-45, "Recommended Chemical Products and Sealants"
SGIA1591E
PS-18
POWER STEERING GEAR
DISASSEMBLY
CAUTION:
●
Disassemble and assemble steering gear by securing the mounting area in a vise using copper
plates.
●
Clean steering gear with kerosene before disassembling. Be careful to avoid splashing or apply-
ing any kerosene over connector of discharge port or return port.
1.
Remove power steering solenoid valve.
CAUTION:
Never attempt to disassemble power steering solenoid valve.
2.
Remove cylinder tubes from gear housing assembly.
3.
Remove rear cover cap from gear sub-assembly.
4.
Measure adjusting screw (1) of height “H” from gear housing
assembly (2), then loosen lock nut.
5.
Remove adjust screw (1), spring (3) and retainer (4) from gear
housing assembly (2).
6.
Remove mounting bolts of gear sub-assembly, then remove
gear sub-assembly from gear housing assembly.
CAUTION:
Never overhaul gear sub-assembly because it is non over-
haul part. If there is something wrong with gear sub-assem-
bly, change it to new one.
7.
Remove O-ring from gear housing assembly.
8.
Loosen lock nut of outer socket, and remove outer socket.
9.
Remove boot clamps of the small side and the large side, then
remove boots.
CAUTION:
When removing boots, be careful not to damage inner
socket and gear housing assembly. If they are damaged,
change them to avoid oil leaks.
10. Move spacer ring to rack assembly side, raise clinching part (at
two points of part A) of lock plate and loosen inner socket, then
remove inner socket from rack assembly.
CAUTION:
When removing lock plate, be careful not to damage the
surface of rack assembly. If damaged rack assembly sur-
face will cause an oil leak. Therefore, if the rack assembly surface is damaged, replace rack
assembly.
11. Drill out the clinching part of gear housing assembly (end cover
assembly side) outer rim with a 3 mm (0.12 in) drill bit. [Drill for
approximately 1.5 mm (0.059 in) depth.]
SGIA1378E
SGIA0363E
STC0013D
POWER STEERING GEAR
PS-19
C
D
E
F
H
I
J
K
L
M
A
B
PS
12. Remove end cover assembly with a 45 mm (1.77 in) open head
(suitable tool).
CAUTION:
●
Never damage the rack assembly surface when remov-
ing.
●
Rack assembly must be replaced if damaged because it
may cause fluid leakage.
13. Pull rack assembly together with rack oil seal (outer side) out
from gear housing assembly.
CAUTION:
●
Never damage the cylinder inner wall when removing the
rack assembly.
●
Gear housing assembly must be replaced if damaged because it may cause fluid leakage.
14. Heat rack Teflon ring to approximately 40
°
C (104
°
F) with a
dryer, then remove it and O-ring from rack.
CAUTION:
Never damage the rack assembly. Rack assembly must be
replaced if damaged because it may cause fluid leakage.
15. Push rack oil seal inside with a 29 mm (1.14 in) socket and an
extension bar to push out rack oil seal (inner side) from gear
housing assembly.
CAUTION:
●
Never damage the gear housing assembly and cylinder
inner wall.
●
Gear housing assembly must be replaced if damaged
because it may cause fluid leakage.
INSPECTION AFTER DISASSEMBLY
Boot
Check boot for cracks and deformation. Replace it, if there are.
Rack
Check rack for damage and wear. Replace it, if there are.
Gear Sub-Assembly
●
Check pinion gear for damage and wear. Replace gear sub-assembly, if necessary.
●
Check bearing while rotating it. Replace gear sub-assembly if bearing ball race was dented, worn, or dam-
aged.
Gear Housing Assembly
Check gear housing assembly for damage and scratches (inner wall). Replace it, if necessary.
SST081B
SGIA0151E
SGIA0179E
PS-20
POWER STEERING GEAR
Outer Socket and Inner Socket
Swing torque
●
Hook a spring balance at the point shown in the figure and pull
the spring balance. Make sure that the spring balance reads the
specified value when ball stud and inner socket start to move.
Replace outer socket and steering gear assembly if they are
outside the standard.
Rotating torque
●
Make sure that the reading is within the following specified
range using Tool. Replace outer socket if the reading is outside
the specified value.
Axial end play
●
Apply an axial load of 490 N (50 kg, 111 lb) to ball stud using a
dial gauge. Measure amount of stud movement, and then make
sure that the value is within the following specified range.
Replace outer socket and inner socket if the measured value is
outside the standard.
ASSEMBLY
CAUTION:
Assemble steering gear assembly by securing the mounting area in a vise using copper plates.
1.
Apply Genuine Nissan PSF or equivalent to O-ring. Put an O-ring into rack Teflon ring.
CAUTION:
Never reuse the O-ring.
2.
Heat rack Teflon ring to approximately 40
°
C (104
°
F) with a
dryer. Assemble it to mounting groove of rack assembly.
CAUTION:
Never reuse the rack Teflon ring.
Outer socket:
4.81 – 45.7 N (0.50 – 4.6 kg, 1.09 – 10.2 lb)
Inner socket:
8.9 – 64 N (0.91 – 6.5 kg, 2.00 – 14.3 lb)
Tool number
A: ST3127S000 (
—
)
Outer socket:
0.3 – 2.9 N·m (0.03 – 0.29 kg-m, 3 - 25 in-lb)
SST333B
SGIA1382E
Outer socket
: 0.5 mm (0.02 in) or less
Inner socket
: 0.2 mm (0.008 in) or less
SGIA0057E
SGIA0153E
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст