Nissan Silvia. Instruction — part 336
SST489B
Checking Steering Wheel Play
NMST0007
I
With wheels in a straight-ahead position, check steering wheel
play.
Steering wheel play:
35 mm (1.38 in) or less
I
If it is not within specification, check the following for loose or
worn components.
Steering gear assembly
Steering column
Front suspension and axle
SST490BA
Checking Neutral Position on Steering Wheel
NMST0008
PRE-CHECKING
NMST0008S01
I
Make sure that wheel alignment is correct.
Wheel alignment:
Refer to SU-13, SDS.
I
Verify that the steering gear is centered before removing the
steering wheel.
CHECKING
NMST0008S02
1.
Check that the steering wheel is in the neutral position when
driving straight ahead.
2.
If it is not in the neutral position, remove the steering wheel and
reinstall it correctly.
3.
If the neutral position is between two teeth, loosen tie-rod lock
nuts. Turn the tie-rods by the same amount in opposite direc-
tions on both left and right sides.
SMA127
Front Wheel Turning Angle
NMST0009
1.
Rotate steering wheel all the way right and left; measure turn-
ing angle.
Turning angle of full turns:
Refer to SU-13, SDS.
2.
If it is not within specification, check rack stroke.
Rack stroke “S”:
Refer to SDS, ST-30.
SST952C
Checking Gear Housing Movement
NMST0010
1.
Check the movement of steering gear housing during station-
ary steering on a dry paved surface.
I
Apply a force of 49 N (5 kg, 11 lb) to steering wheel to check
the gear housing movement.
Turn off ignition key while checking.
Movement of gear housing:
±
2 mm (
±
0.08 in) or less
2.
If movement exceeds the limit, replace mount insulator after
confirming proper installation of gear housing clamps.
ON-VEHICLE SERVICE
Checking Steering Wheel Play
ST-6
SST953C
Adjusting Rack Retainer
NMST0039
I
Perform this driving test on a flat road.
1.
Check whether vehicle moves in a straight line when steering
wheel is released.
2.
Check whether steering wheel returns to neutral position when
steering wheel is released from a slightly turned (approx. 20°)
position.
I
If any abnormality is found, correct it by resetting adjusting
screw.
Checking and Adjusting Drive Belts
NMST0011
Refer to EM-16, “Checking Drive Belts”.
SMA654C
Checking Steering Gear and Linkage
NMST0040
STEERING GEAR
NMST0040S01
I
Check gear housing and boots for looseness, damage or
grease leakage.
I
Check connection with steering column for looseness.
STEERING LINKAGE
NMST0040S02
I
Check ball joint, dust cover and other component parts for
looseness, wear, damage or grease leakage.
SST457C
Checking Fluid Level
NMST0012
Check fluid level, referring to the scale on reservoir tank.
Use “HOT” range for fluid temperatures of 50 to 80°C (122 to
176°F).
Use “COLD” range for fluid temperatures of 0 to 30°C (32 to 86°F).
CAUTION:
I
Do not overfill.
I
Recommended fluid is Type Dexron
TM
III or equivalent.
Refer to MA-8, “Fluids and Lubricants”.
SST954C
Checking Fluid Leakage
NMST0013
Check the lines for improper attachment and for leaks, cracks,
damage, loose connections, chafing and deterioration.
1.
Run engine between idle speed and 1,000 rpm.
Make sure temperature of fluid in oil tank rises to 50 to 80°C
(122 to 176°F).
2.
Turn steering wheel right-to-left several times.
3.
Hold steering wheel at each “lock” position for five seconds
and carefully check for fluid leakage.
GI
MA
EM
LC
EC
FE
CL
MT
AT
PD
AX
SU
BR
RS
BT
HA
SC
EL
IDX
ON-VEHICLE SERVICE
Adjusting Rack Retainer
ST-7
CAUTION:
Do not hold the steering wheel in a locked position for more
than 15 seconds.
4.
If fluid leakage at connectors is noticed, loosen flare nut and
then retighten.
Do not overtighten connector as this can damage O-ring,
washer and connector.
5.
If fluid leakage from power steering pump is noticed, check
power steering pump. Refer to ST-25.
6.
Check rack boots for accumulation of power steering fluid.
Bleeding Hydraulic System
NMST0014
1.
Raise front end of vehicle until wheels are clear of the ground.
2.
Add fluid into oil tank to specified level. Then quickly turn steer-
ing wheel fully to right and left and lightly touch steering stop-
pers.
Repeat steering wheel operation until fluid level no longer
decreases.
3.
Start engine.
Repeat step 2. above.
I
Incomplete air bleeding will cause the following to occur. When
this happens, bleed air again.
a)
Air bubbles in reservoir tank
b)
Clicking noise in oil pump
c)
Excessive buzzing in oil pump
Fluid noise may occur in the valve or oil pump. This is common
when the vehicle is stationary or while turning the steering wheel
slowly. This does not affect the performance or durability of the
system.
SST491B
SST090B
Checking Steering Wheel Turning Force
NMST0015
1.
Park vehicle on a level, dry surface and set parking brake.
2.
Start engine.
3.
Bring power steering fluid up to adequate operating tempera-
ture. [Make sure temperature of fluid is approximately 50 to
80°C (122 to 176°F).]
Tires need to be inflated to normal pressure.
4.
Check steering wheel turning force when steering wheel has
been turned 360° from the neutral position.
Steering wheel turning force:
39 N (4 kg, 9 lb) or less
5.
If steering wheel turning force is out of specification, check
rack sliding force.
a.
Disconnect steering column lower joint and knuckle arms from
the gear.
b.
Start and run engine at idle to make sure steering fluid has
reached normal operating temperature.
c.
Pull tie-rod slowly to move it from neutral position to
±
11.5 mm
(
±
0.453 in) at speed of 3.5 mm (0.138 in)/s. Check that rack
sliding force is within specification.
Average rack sliding force:
186 - 245 N (19 - 25 kg, 42 - 55 lb)
ON-VEHICLE SERVICE
Checking Fluid Leakage (Cont’d)
ST-8
Maximum force deviation:
98 N (10 kg, 22 lb)
d.
Check sliding force outside the above range at rack speed of
40 mm (1.75 in)/s.
Rack sliding force:
Not more than 294 N (30 kg, 66 lb)
Maximum force deviation:
147 N (15 kg, 33 lb)
6.
If rack sliding force is not within specification, overhaul steer-
ing gear assembly.
7.
If rack sliding force is OK, inspect steering column. Refer to
ST-13.
SST834-H
Checking Hydraulic System
NMST0016
Before starting, check belt tension, driving pulley and tire pressure.
1.
Set Tool. Open shut-off valve. Then bleed air. Refer to “Bleed-
ing Hydraulic System”, ST-8.
2.
Run engine at idle speed or 1,000 rpm.
Make sure temperature of fluid in tank rises to 50 to 80°C (122
to 176°F).
WARNING:
Warm up engine with shut-off valve fully opened. If engine is
started with shut-off valve closed, fluid pressure in oil pump
increases to maximum. This will raise oil temperature abnor-
mally.
3.
Check pressure with steering wheel fully turned to left and right
positions with engine idling at 1,000 rpm.
CAUTION:
Do not hold the steering wheel in a locked position for more
than 15 seconds.
Oil pump maximum standard pressure:
8,630 - 9,219 kPa (88 - 94 kg/cm
2
, 1,251 - 1,337 psi)
I
If pressure reaches maximum operating pressure, system is
OK.
I
If pressure increases above maximum operating pressure,
check power steering pump flow control valve. Refer to ST-25.
4.
If power steering pressure is below the maximum operating
pressure, slowly close shut-off valve and check pressure
again.
CAUTION:
Do not close shut-off valve for more than 15 seconds.
I
If pressure increases to maximum operating pressure, gear is
damaged. Refer to “Removal and Installation”, ST-16.
I
If pressure remains below maximum operating pressure, pump
is damaged. Refer to “Disassembly”, ST-26.
5.
After checking hydraulic system, remove Tool and add fluid as
GI
MA
EM
LC
EC
FE
CL
MT
AT
PD
AX
SU
BR
RS
BT
HA
SC
EL
IDX
ON-VEHICLE SERVICE
Checking Steering Wheel Turning Force (Cont’d)
ST-9
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