SST834-I
Checking Hydraulic SystemNLST0016Before 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 60 to 80°C (140
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:
SR engine
8,600 - 9,200 kPa (86.0 - 92.0 bar, 87.7 - 93.8
kg/cm
2, 1,247 - 1,334 psi)
QG engine
8,600 - 9,200 kPa (86.0 - 92.0 bar, 87.7 - 93.8
kg/cm
2, 1,247 - 1,334 psi)
YD engine
8,800 - 9,400 kPa (88.0 - 94.0 bar, 88.7 - 95.8
kg/cm
2, 1,261 - 1,362 psi)
+If pressure reaches maximum operating pressure, system is
OK.
+If pressure increases above maximum operating pressure,
check power steering pump flow control valve. Refer to ST-21.
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.
+If pressure increases to maximum operating pressure, gear is
damaged. Refer to“Removal and Installation”, ST-16.
+If pressure remains below maximum operating pressure, pump
is damaged. Refer to“Disassembly”, ST-24.
5. After checking hydraulic system, remove Tool and add fluid as
necessary. Then completely bleed air out of system. Refer to
ST-8.
ON-VEHICLE SERVICE
Checking Hydraulic System
ST-9
Steering Gear and LinkageNLST0035
Steering gear typePR25T
Tie-rod outer ball
jointSwinging force at cotter pin hole:
“A”N (kg, lb)6.9 - 65.7 (0.66 - 6.59, 1.5 - 14.8)
Rotating torque:“B”N·m (kg-cm,
in-lb)0.29 - 2.94 (3.0 - 30.0, 2.6 - 26.0)
Axial end play:“C”mm (in) 0.4 (0.016) or less
Tie-rod inner ball
jointSwinging force*:“A”N (kg, lb) 5.9 - 46.1 (0.58 - 4.65, 1.3 - 10.4)
Axial end play:“C”mm (in) 0.2 (0.004) or less
Tie-rod standard length“L”mm (in) 185 (7.28)
*: Measuring point [!: 172 mm (6.77 in)]
SST867C
Rack stroke“S”mm (in)70 (2.76)
SST086BA
Power SteeringNLST0036
Steering gear typePR25T
Rack sliding
force N (kg, lb)
Under normal oper-
ating oil pressureRange within±11.5 mm (±0.453 in)
from the neutral position at rack
speed of 3.5 mm (0.138 in)/sAverage force 197 - 255 (20.1 - 26.0, 44.3 - 57.3)
Steering wheel turning force
(Measured at one full turn from the neutral position) N (kg, lb)26 - 32 (2.7 - 3.2, 5.8 - 7.2)
Fluid capacity (Approximate)!(Imp qt)1.0 (7/8)
Oil pump maximum pressure kPa (bar, kg/cm
2, psi)QG 8,600 - 9,200 (86.0 - 92.0, 87.7 - 93.8, 1,247 - 1,334)
SR 8,600 - 9,200 (86.0 - 92.0, 87.7 - 93.8, 1,247 - 1,334)
YD 8,800 - 9,400 (88.0 - 94.0, 88.7 - 95.8, 1,261 - 1,362)
SERVICE DATA AND SPECIFICATIONS (SDS)
Steering Gear and Linkage
ST-28
