service NISSAN ALMERA N15 1995 Service Manual

SST491B
SST090B ON-VEHICLE
SERVICE
Bleeding Hydraulic System

1. Raise frontendofvehicle untilwheels areclear ofthe
ground.
2. Add fluid intooiltank tospecified level.Thenquickly turn
steering wheelfullytoright andleftand lightly touchsteer-
ing stoppers.
Repeat steering wheeloperation untilfluid level nolonger
decreases.
3. Start engine.
Repeat step2.above.
• Incomplete airbleeding willcause thefollowing tooccur.
When thishappens, bleedairagain.
a. Air bubbles inreservoir tank
b. Clicking noiseinoil pump
c. Excessive buzzinginoil pump
Fluid noise mayoccur inthe valve oroil pump. Thisiscommon
when thevehicle isstationary orwhile turning thesteering
wheel slowly. Thisdoes notaffect theperformance ordurabil-
ity ofthe system.

Checking SteeringWheelTurning Force(For
power steering)

1. Park vehicle onalevel, drysurface andsetparking brake.
2. Start engine.
3. Bring power steering fluiduptoadequate operating temper-
ature. [Make suretemperature offluid isapproximately 60
to 80°C (140to176°F).]

Tires needtobe inflated tonormal pressure.

4. Check steering wheelturning forcewhen steering wheel
has been turned 360°from theneutral position.

Steering wheelturning force: •
39 N(4 kg, 9Ib) orless

5.
If
steering wheelturning forceisout ofspecification, check
rack sliding force.
a. Disconnect steeringcolumnlowerjointandknuckle arms
from thegear.
b. Start andrunengine atidle tomake suresteering fluidhas
reached normaloperating temperature.
c. Pull tie-rod slowlytomove itfrom neutral position to
::l::
11.5
mm
(::l::
0.453 in)atspeed of3.5 mm (0.138 in)/s.Check that
rack sliding forceiswithin specification.

Average racksliding force:
152.0 -240.3 N(15.5 -24.5 kg,34.2 -54.0 Ib)
Maximum forcedeviation:
98 N(10 kg, 22Ib)

6.
If
rack sliding forceisnot within specification, overhaul
steering gearassembly.
7. Ifrack sliding forceisOK, inspect steering column.Referto
ST-13.

ST-7

ST27091000

.. :Direction ofoil flow Low-pressure
hose SST834-AON-VEHICLE
SERVICE
Checking Hydraulic System

Before starting, checkbelttension, drivingpulleyandtirepres-
sure. 1. Set Tool. Open shut-off valve.Thenbleed air.(See "Bleed-
ing Hydraulic System"ST-7.)
2. Run engine.

Make suretemperature offluid intank rises to60 to80°C (140
to 176°F).
WARNING:
Warm upengine withshut-off valvefullyopened. Ifengine is
started withshut-off valveclosed, fluidpressure inoil pump
increases tomaximum. Thiswillraise oiltemperature abnor-
mally.

3. Check pressure withsteering wheelfullyturned toleft and
right positions withengine idlingat1,000 rpm.

CAUTION:
Do not hold thesteering wheelinalocked position formore
than 15seconds.
Oil pump maximum standardpressure:
7,649 -8,238 kPa(76.5 .82.4 bar,
78 -84 kg/cm
2,
1,109-1,194 psi)

4.
If
oil pressure isbelow thestandard pressure, slowlyclose
shut-off valveandcheck pressure.
• When pressure reachesstandard pressure, gearisdam-
aged.
• When pressure remainsbelowstandard pressure, pumpis
damaged.

CAUTION: Do not close shut-off valveformore than15seconds.

5.
If
oil pressure ishigher thanstandard pressure, checkoil
pump flowcontrol valve.
6. After checking hydraulic system,removeToolandaddfluid
as necessary. Thencompletely bleedairout ofsystem.

S1-8

POWERSTEERING OILPUMP
Pre-disassembly Inspection

Disassemble thepower steering oilpump onlyifthe following
items arefound.
• Oilleak from anypoint shown inthe figure
• Deformed ordamaged pulley
• Poor performance

SST984A Disassembly
CAUTION: • Parts which canbedisassembled arestrictly limited. Never
disassemble partsother thanthose specified.
• Disassemble inas clean aplace aspossible.
• Clean yourhands before disassembly.
• Donot use rags; usenylon cloths orpaper towels.
• Follow theprocedures andcautions inthe Service Manual.
• When disassembling andreassembling, donot letforeign
matter enterorcontact theparts.
Front housing Extension
bar
•
Remove snapring,thendraw drive shaftout.

Be careful nottodrop drive shaft.
SST010B
•Remove oilseal.

Be careful nottodamage fronthousing.

• Remove connector andflow control valvewithspring.

Be careful nottodrop flowcontrol valve.
SST036A 5T-30

SERVICEDATAANDSPECIFICATIONS (SOS)
General Specifications

CD and SR
Applied model GAengine model engine
models
Steering model Manual
Powersteering
steering
Steering geartype R24N PR24AC
Steering overallgear
23.2 17.1
ratio
Turns ofsteering wheel
4.21 3.172.95
(Lock tolock)
Steering columntype Collapsible,tilt

Inspection andAdjustment
GENERAL

Steering wheelaxialplay

mm (in)

Steering wheelplay mm(in)
Movement ofgear housing
mm (in)

STEERING COLUMN

Applied model
Steering columnlength"L"

mm (in)

L

'"
'- Center ofjoint 0(0)
35 (1.38) orless

:!:
2 (
:!:
0.08) orless
All
533.0 -535.0
(20.98 -21.06)

SST334C

ST-34

SERVICEDATAANDSPECIFICATIONS (50S)
Inspection andAdjustment (Cont'd)
STEERING GEARANDLINKAGE

CDand
Applied model GA
engine model SRengine
models
Steering geartype R24NPR24AC
Tie-rod outerballjoint
Swinging forceat
6.9-64.7
cotter pinhole: "A"
(0.7-6.6, 1.5-14.6)
N (kg, Ib)
Rotating torque:"B" 0.29
-294
N'm (kg-em, in-Ib) (30
-30.0, 26-260)
Axial endplay: "C"
0.5(0.020) orless
mm (in)
Tie-rod innerballjoint

.

Swinging force":"A" 3.9
-53.0
6.9-569
(0.4 -5.4,
N (kg, Ib)
0.9-11.9) (07
-58,1.5 -12.8)
Axial endplay: "C"
0.4(0.016)
a
(0)
mm (in)
Tie-rod standard length"L"
187(7.36)
mm (in)
". Measuring point
[f:
137 mm (5.39 in)]

SST488C

Retainer adjustment
Adjusting screw
Initial tightening
984.9
-5.9
torque (100,87)(50-60, 43-52)
Nm (kg-em, in-Ib)
Retightening torque
after loosening
-
02
(2,1.7)
N'm (kg-em, in-Ib)
Tightening torque
after gear has

-
49(50, 43)
settled
N'm (kg-em, in-Ib)
Lessthan
60'
[Within
Returning angle play
of0.1
70'-110'
degree mm
(0.004
in)/15 N'm
(1.5 kg-m,
11 ft-Ib)] CD
and
Applied model GAengine model SRengine
models
Steering geartype R24N
PR24AC
Rack stroke "S" mm(in) 70(2.76) 65(2.56)

POWER STEERING

Applied model All
Steering geartype PR24AC
Rack sliding force
N(kg, Ib)
Under normal operating oil
pressure
Range within ~.115 mm
(:1:0.453 in)
from theneutral
position atrack speed of
3.5 mm (0.138 in)/s
Average force 1520
-2403
(15.5 -24.5, 34.2-54.0)
Maximum forcedeviation 98(10, 22)
Except forthe above range
Maximum slidingforce 294(30, 66)
Maximum forcedeviation 147
(15, 33)
Steering wheelturning force
(Measured atone fullturn from the
39(4, 9)or less
neutral position)
N(kg, Ib)
Fluid capacity (Approximate)
0.9(3/4)

f
(Imp qt)
7,649-8,238
Oil pump maximum pressure (76.5
-82.4,
kPa (bar, kg/em?, psi) 78-84,
1,109 -1,194)
•

ST-35