1998 NISSAN PATROL oil pressure

Tool number
Tool nameDescription
ST29020001
Ball joint remover
NT551
Removing ball joint
a: 34 mm (1.34 in)
b: 6.5 mm (0.256 in)
c: 61.5 mm (2.421 in)
ST27091000
Pressure gauge
NT547
Measuring oil pressure
KV48102500
Pressure gauge adapter
NT542
Measuring oil pressure
ST3127S000
V1GG91030000
Torque wrench
V2HT62940000
Socket adapter
V3HT62900000
Socket adapter
NT541
Measuring turning torque
KV48100301
Strut and steering gear box
attachment
NT688
Disassembling and assembling steering gear
a: 162 mm (6.38 in)
b: 110 mm (4.33 in)
c: 190 mm (7.48 in)
d: 9 mm (0.35 in)
PRECAUTIONS AND PREPARATION
Special Service Tools (Cont'd)
ST-2

Bleeding Hydraulic System
1. Raise front end of vehicle until wheels are clear of the ground.
2. Add ¯uid into oil tank to speci®ed level. Then, quickly turn steer-
ing wheel fully to right and left and lightly touch steering stop-
pers.
Repeat steering wheel operation until ¯uid level no longer
decreases.
3. Start engine.
Repeat step 2 above.
+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 steering wheel
slowly. This does not affect performance or durability of the system.
Checking Steering Wheel Turning Force
1. Park vehicle on a level, dry surface and set parking brake.
2. Start engine.
3. Bring power steering ¯uid up to adequate operating tempera-
ture. [Make sure temperature of ¯uid is approximately 60 to
80ÉC (140 to 176ÉF).]
Tires need to be in¯ated to normal pressure.
4. Check steering wheel turning force when steering wheel has
been turned 360É from the neutral position.
Steering wheel turning force:
39 N (4 kg, 9 lb) or less
Checking Hydraulic System
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-6.
2. Run engine at idle speed or 1,000 rpm.
Make sure ¯uid temperature in reservoir tank rises to 60 to
80ÉC (140 to 176ÉF).
WARNING:
Warm up engine with shut-off valve fully opened. If engine is
started with shut-off valve closed, ¯uid pressure in the power
steering pump increases to maximum. This will raise ¯uid tem-
perature abnormally.
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.
Power steering pump maximum operating pressure:
8,140 - 8,728 kPa (81.4 - 87.3 bar, 83 - 89 kg/cm
2,
1,180 - 1,266 psi)
+If pressure reaches maximum operating pressure, system is
OK.
+If pressure increases above maximum operating pressure,
check power steering pump ¯ow control valve. Refer to ST-16.
SST491B
SST834-E
ON-VEHICLE SERVICE
ST-6

POWER STEERING SYSTEM
(Model: PB69K)
Steering wheel turning force
(at 360É from neutral posi-
tion and circumference of
steering wheel) N (kg, lb)39 (4, 9) or less
Oil pump pressure
kPa (bar, kg/cm
2, psi)8,140 - 8,728
(81.4 - 87.3, 83 - 89, 1,180 - 1,266)
at idling
Fluid capacity
m!(Imp ¯ oz)Approximately 1,000 (35.2)
Normal operating tempera-
ture ÉC (ÉF)60 - 80 (140 - 176)
Steering gear turning torque
Nzm (kg-cm, in-lb)
360É position from
straight-ahead position0.15 - 0.78 (1.5 - 8.0, 1.3 - 6.9)
Straight-ahead position
(As compared with steer-
ing wheel turned 360É)0.2 - 0.5 (2 - 5, 1.7 - 4.3) higher
Maximum turning torque 0.44 - 1.18 (4.5 - 12, 3.9 - 10.4)
Backlash at pitman arm top
end (in a straight-
ahead position) mm (in)0 - 0.1 (0 - 0.004)
End play (at sector shaft
end in neutral position)
mm (in)0.1 (0.004) or less
SERVICE DATA AND SPECIFICATIONS (SDS)
Inspection and Adjustment (Cont'd)
ST-23