Infiniti QX4 (R50). Manual — part 551
SST051C
3.
Remove tie-rod outer sockets and boots.
4.
Loosen tie-rod inner socket by prying up staked portion, and
remove socket.
5.
Remove retainer.
6.
Remove pinion assembly.
7.
Use a 2 to 2.5 mm (0.079 to 0.098 in) diameter drill to com-
pletely remove staked portion of gear housing end.
SST652C
8.
Remove gear housing end cover assembly with a suitable tool.
9.
Draw out rack assembly.
10. Remove rack seal ring.
I
Using a heat gun, heat rack seal to approximately 40°C
(104°F).
I
Remove rack seal ring.
Be careful not to damage rack.
SST644C
11. Remove rack bushing and rack oil seal using tape wrapped
socket and extension bar.
Do not scratch inner surfaces of pinion housing.
Inspection
NBST0029
Thoroughly clean all parts in cleaning solvent or Genuine Nissan
PSF II or equivalent. Blow dry with compressed air, if available.
BOOT
NBST0029S01
I
Check condition of boot. If cracked excessively, replace it.
I
Check boots for accumulation of power steering fluid.
RACK
NBST0029S02
Thoroughly examine rack gear. If damaged, cracked and worn,
replace it.
PINION ASSEMBLY
NBST0029S03
I
Thoroughly examine pinion gear. If pinion gear is damaged,
cracked and worn, replace it.
I
Check that all bearings roll freely. Ensure that balls, rollers and
races are not cracked, pitted and worn.
GEAR HOUSING CYLINDER
NBST0029S04
Check gear housing cylinder bore for scratches and other damage.
Replace if necessary.
POWER STEERING GEAR AND LINKAGE
Disassembly (Cont’d)
ST-20
SST468C
TIE-ROD OUTER AND INNER SOCKETS
NBST0029S05
I
Check ball joints for swinging force.
Tie-rod outer and inner ball joints swinging force “A”:
Refer to SDS, ST-33.
I
Check ball joint for rotating torque.
Tie-rod outer ball joint rotating torque “B”:
Refer to SDS, ST-33.
I
Check ball joints for axial end play.
Tie-rod outer and inner ball joints axial end play “C”:
Refer to SDS, ST-33.
I
Check condition of dust cover. If cracked excessively, replace
outer tie-rod.
SST083B
Assembly
NBST0030
1.
Using a heat gun, heat new teflon rack seal ring to approxi-
mately 40°C (104°F). Then place it onto rack.
SBR132C
2.
Using Tool, compress rack seal ring securely on rack.
Always insert Tool from the rack gear side.
SST201A
3.
Insert new rack oil seal.
I
Place plastic film into rack oil seal to prevent damage by
rack teeth.
I
Do not forget to remove plastic film after rack oil seal is
positioned properly.
I
Make sure lips of rack oil seal face each other.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
RS
BT
HA
SC
EL
IDX
POWER STEERING GEAR AND LINKAGE
Inspection (Cont’d)
ST-21
SST645C
4.
Install rack oil seal and rack bushing with rack assembly.
SST653C
5.
Insert rack oil seal and end cover assembly to rack. Then
tighten end cover assembly.
SST654C
6.
Fasten cylinder end cover assembly to gear housing by stak-
ing.
SST651C
7.
Set rack gear in the neutral position.
Rack stroke “S”:
Refer to SDS, ST-33.
SST381A
8.
Coat seal lip of new pinion oil seal with multi-purpose grease.
Install it into pinion housing of gear with a suitable tool.
Make sure lip of oil seal faces up when installed.
POWER STEERING GEAR AND LINKAGE
Assembly (Cont’d)
ST-22
SST074B
9.
Install pinion bearing adjusting shim(s).
I
Whenever pinion assembly, gear housing and rear housing are
disassembled, replace shim(s) with new ones. Always use the
same number of shim(s) when replacing.
SST085B
10. Install new pinion seal ring (made of Teflon) on pinion gear
assembly.
I
Using a heat gun, heat pinion seal ring to approximately 40°C
(104°F) before installing it onto pinion gear assembly.
I
Make sure pinion seal ring is properly settled in valve groove.
SST075B
11. Apply a coat of multi-purpose grease to needle bearing roller
and oil seal lip.
SST552
12. Install pinion assembly to rear housing.
Be careful not to damage pinion oil seal.
SST133C
13. Apply a coat of multi-purpose grease to new rear oil seal lip
before installing rear housing.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
RS
BT
HA
SC
EL
IDX
POWER STEERING GEAR AND LINKAGE
Assembly (Cont’d)
ST-23
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