power steering fluid NISSAN 300ZX 1984 Z31 Steering System Workshop Manual

POWER STEERING SYSTEM -Checking
Fluid Level Check
Check the fluid level when the fluid IS cold.
Refer to MA section
Power Steering Pump
Belt Tension
Refer to MA section
Fluid Leakage Check
1 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).
2 Turn steering wheel to right-to-left several
times
3 Hold steering wheel at each "lock" position for
five seconds
and carefully check for fluid
leakage
CAUTION :
0 Do not hold steering wheel at "lock" position
for more than 15 seconds at a time.
0 If fluid leaks at connectors, replace O-ring (if
equipped) Do not overtighten connector as
this can damage O-ring and connector.
- Bleeding Hydraulic System -
1. Raise front end of vehicle until wheels clear
ground
2 While adding fluid, quickly turn steering wheel
fully to right and
left and lightly touch steering
stoppers.
Repeat steering wheel operation until fluid
level no
longer decreases
Repeat step 2 above
3. Start engine.
Hydraulic System Check
Before starting, check belt tension, driving pulley
and tire pressure. (Refer to MA section )
1 Set Tool Open shut off valve Then bled air
(See "Bleeding Hydraulic System" )
ST27091000 lJ263571
L 1 ow pressure
& Direction of 011 flow hose
ET834
2 Run engine.
Make sure temperature of fluid in tank rises to
60 to 80°C
(140 to 176°F).
3 Check pressure with steering wheel fully turned
in left and right
CAUTION:
Do not hold steering wheel at lock position for
more than fifteen seconds.
Standard pressure:
6,669 - 7,257 kPa
(68
- 74 kglcm' ,967 - 1,052 psi at idling)
4
0
0
If oil pressure is below the standard, slowly
close shut-off valve and check pressure
If pressure raises to standard, gear is damaged
If pressure remains below standard, pump
IS
damaged.
Gear may be damaged
If oil pressure is above the standard, pump may
be damaged 5
CAUTION:
Do not close shutoff valve for more than fifteen
seconds.
6 After checking hydraulic system, remove Tool
and add fluid as necessary, then completely
bleed
air out of system
ST-6

POWER STEERING SYSTEM -Checking
Turning Force Check
1. Park vehicle on a level, dry surface and set
parking brake
2 Bring power steering fluid up to adequate
operating temperature. [Make sure temperature
of fluid
is approximately 60 to 80°C (140 to
176"F)l
Tires must be inflated to normal pressure.
3 Check steering wheel turning force when
steering wheel has been turned 360" from
neutral position
Steering wheel turning force.
Less than 39 N (4 kg, 9 Ib)
SST474
-Steering Wheel Play Adjustment -
Steering wheel axial play:
0 mm (0 in)
Steering wheel play.
Less than 35 mm (1.38 in)
If steering wheel play is not within specifica-
tions, check condition of column shaft and
tie-
rod ball points If they are in good order, ad-
just rack retainer
Rack retainer adjustment:
a) Adjust only when steering wheel play is
outside specifications
b) Prior to adjustment, completely loosen ad-
justment screw, clean old locking sealer
and apply new locking sealer.
Tighten the screw to approximately
3 N.m (0.3 kg-m, 22 ft-lb) and back off
by
20 to 25" Measure steering wheel
play to make sure
it is within specifi-
cations. Then tighten lock nut
"1
kg-m. 29 - 43 ft-lbl
c) After adjustment, drive vehicle at low speeds to
check for proper operation
of steering system
ST-7

POWER STEERING GEAR AND LINKAGE
Disassembly and Assembly
0 Do not disassemble unless repairing to stop oil leak, replacing tie-rod and tie-rod inner rocket ball joint, or for various
adjustments.
0 Do not reuse O-rings or oil seals.
0 When assembling, apply a coat of oil to mating surfaces of O-rings and 011 seals
0 When assembling, be careful not to damage oil seals
0 Before starting work, thoroughly clean all parts in cleaning solvent or automatic transmission fluid "Dexron Type" and
blow dry with compressed air, if available.
0 After assembling tie-rod inner socket to rack & housing ASSY, check rack stroke (refer to "Rack stroke")
Lock nut
Refer to "Cylinder end housing and Refer to 'Tie-md inner Locket mtallation"
7 .... . . , . pmon housing lock nuts tight !e","." -
&?; '(80 100.58-72)
78.108
[Using tool KV48101800
when assembling ram ana cylinder end housing ASSY, becareful not to damage 011 seal
"18 0.11 0,58.80)
e]'
/ I
Refer to
'Tne-rod ,"stallatlo""
, collar
' @,e3
14.20)
be careful not to damage rack packing inner tube anernblong" (91 (2.0.2.7.
I.
Rad. and inner tubearrrnblmg
pjl N m (kgm. ft-lb)
Greaseup winti
e] Lubrication points
@ Donot reuse a
ST-8

POWER STEERING GEAR AND LINKAGE
Disassembly and Assembly (Cont'd)
0 Refer to "Tie-rod inner socket installation",
"Tie-rod installation", and "Rack stroke"
-
ASSEMBLY
Before starting work, thoroughly clean all parts
in cleaning solvent or automatic transmission
fluid "Dexron Type" and blow dry with com-
pressed air,
if available
Do not reuse old oil seal, packing and O-ring
Always
install new ones
When installing oil
seals, use suitable tool
SST548
When installing cylinder end housing or rear
housing cover, wrap cellophane tape around
rack end
or pinion serrations to prevent oil seal
from being damaged
Cylmder end housing (Apply a coat of automatrc transmission fluid "Oexron Type" to 081 seal mating surface I
rCellophane tape
a- - Rack
Rear housng cover IA~ply a coat of automatic transmission fluid "Dexron Type" to 011 seal mating
SSTZlOA
Apply oil to O-rings as well as frictional sur.
faces of oil
seals and packings
Refer to "Rack and inner tube assembling" v
2. Assemble rack & inner tube assembly,
cylinder, cylinder end housing and pinion
housina.
I 0 Be careful not to damage oil seal
0 Pay attention to dlrection for the cylinder end
housing and pinion housing to prevent undue
stress from being applied to hydraulic pipes
0 Cylinder end housing and pinion housing lock
nut
p1 78-108Nm
(8 0 . 11.0 kg-m, 58 - 80 ft-lb)
Refer to "Cylinder end housing and pinion
housing lock nut tightening"
4. Install pinion complete and rear housing
complete.
I
0 Be careful not to damage oil seal
0 After adjusting pinion preload, tighten real
housing cover lock nut
p1 78 - 137 N.m
(8 - 14 kg-m, 58. 101 ft-lbl
Rear housing cover lock nut.
Refer to "Pinion preload adjustment"
5. Install retainer assembly.
force adjusted to specifications
Refer to "Retainer adjustment"
6. Check rack for smooth movement over its
entire stroke, without binding and noise. I
7. Install hydraulic piping and breather hose.
ST- 1 0

POWER STEERING GEAR AND LINKAGE
1701.
I601
I501
Disassembly and
Rack and inner tube assembling
-
1
Insert rack packing into rack
damage by rack teeth Attach back-up
oat of automatic 80" fluid "Dexion * 1 - n '6 Type" to matlng surface of rack packing 1 ack
k pnrton
KV48103100 lJ342641
ackup collar and rack
1
Insert rack packing into mer tube with tool
SST211A
Tie-rod inner socket installation
After tightening inner socket, bend
lock plate securely and remove burrs

7 Lock plate
Inner socket
Apply locking sealer
78-98Nm ' I8 0 - 10 0 kern. 58.72 h-lbl / I Be sure lock plate ratchet gets into groove at rack end SST213A
Rack stroke
sembly (Cont'd)
Cylinder end housing and pinion housing lock nut
tightening
n : Locknut:
78 - 108 N m
(8.0 - 11.0 kg-m, 58 - 80 ft-lb)
Torque wrench
lJ288201 vc'
98 I101
88 I91
-
04050607 08 m
4' I1 51 I2 01 (2 51 Iff1
Effective length of torque wrench L ssT212A
Tie-rod installation
Lack nut Lock plate
Inner socket
Standard dimension L = 31 5 mm I1 476 In1 When installing tie-rod or adiustmg toe-,".
be careful not to twist boots Toe-," Refer to MA section
Pl"l.3"
Rear housing
I?-
- 62 lz.441 'Cylmder end housing /
SST'214A
iTie-rad inner socket
ICylmder
end hourlng sidel SSTZlBA IPinion sidel
ST-I 1

POWER STEERING GEAR AND LINKAGE
Inspection and Adjustment
PINION PRELOAD AND RACK STARTING
FORCE
After disconnecting hydraulic line and draining
fluid, measure them
Pmon preload Less than 1 2 N m I12 kg-cm, 10 In-lbl
Turn shaft by wrappi towel or wnvl tape ar serrated portion
102100 (J288171
SST216A
Rack starting force 122 6.1863 N I12 5- 19 kg.276 -41 9 Ibl at Steernng Ce"t.3,
SST217A
If they are not within specifications, adjust
retainer adjusting screw
If retainer adjustment cannot be made proper-
ly, fully loosen retainer adjusting screw, and
then adjust pinion preload
Then readjust retainer adjusting screw
If pinion preload adjustment cannot be made
properly, replace steering gear assembly
Retainer adjustment
1
2
3
R
Remove retainer adjusting screw and clean old
locking
sealer off the threads
Apply new locking sealer to the threads
Tighten
the screw to approximately 3 N rn (0.3
kg-m, 2 2 h-lb) and back it off by 20 to 25"
If preload and starting force are within speci-
fied ranges, tighten lock nut securely (Check
rack for smooth movement over
its entire
stroke.)
Pinion preload:
Less than 1.2 Nm 112 kgcm, 10 in-lb)
Rack starting force:
122.6
- 186.3 N
(12.5-19kg,276 -41.9lb)
. Retainer adjusting screw lock nut
39 - 59 Nm
(4.0 - 6.0 kgm, 29 - 43 ft-lb)
Pinion preload adjustment
Before making pinion preload adjustment, make
sure retainer adjusting screw
is loosened com-
pletely
1 Screw in rear housing cover completely and
back it off by 180 to 360". Then turn pinion
a few rotations and then measure pinion
starting torque
KV48101700
I or
SST218A
Pinion starting torque T, :
Free play should not be allowed for pinion
Less than 0.7 Nm (7 kg-cm, 6.1 in-lb)
ST-1 2

POWER STEERING OIL PUMP
Connector Ispool cover1 Flexible hose
69-78
38.52 mi7'0-80'51 1 A Washe2 Connector bolt
7 . I 0 9- 12 (09.12.65 -871 13 9.5 3,28 - 381
s,,rr,nn ",no.... I
36-51] --I ..I.. r,r_
re switch (Non-turbocharged model)
Htgh-pressure ride
hydraultc
line pressure
1,961
- 2,942 kPa
(20.30 kg/cm' ,
Decreasing to aPProx
Turn ON
981 -2,942 kPa
(10 - 30 kg/cm' ,
142-427~511 1
42 I3 2 -43.23- 31)
L Pulley shaft (When assembling pulley shaft. be careful
not to damage oil seal lip1 seal
am
(41 31 -42 13.2 - 4.3, 23 - 311 (41 N m (kg-m. ft-lb)
fl Lubricatzon points (with automatic transmission fluid "Dexron Type") @ ~onotreu~
- Pre-disassembly Inspection
The power steering oil pump should be disassem-
bled only
d any of the following conditions are
ObSWVed.
Oil leak at the following points
SST126A
Deformed or damaged pulley
SST220A
Oil Pump Installation
mounting bracket
steering pump
(41 N m (kgm, ft-lbl
SST221A
m16-21 (1.6-21,
12.15)
After installing oil pump, adjust belt tension.
Refer to MA section.
ST-1 4

POWER STEERlNG OIL PUMP
Inspection
Wash clean all disassembled parts (inside pump) in
suitable cleaning solvent.
PULLEY AND PULLEY SHAFT
0
0
If pulley is cracked or deformed, replace it.
If an oil leak IS observed around pulley shaft oil
seal, replace it.
If serration of pulley or pulley shaft IS de-
formed
or worn, replace it.
0
OIL PRESSURE SWITCH
(Non-turbocharged model)
Operation High-pressure side hydraulic
line pressure kPa (kglcm', psi) ~~
I Turn ON Increasing to 1,961 - 2,942
(20- 30,284 ~ 4271
Turn OFF Decreasing to Approx
981 .2,942 (10 - 30,142 - 427)
Refer to "Hydraulic
System Check" in "POWER
STEERING SYSTEM
- Checking"
Assembly
Assemble 011 pump in the reverse order of dts-
assembly, noting the following instructions
Before installing O-rings and oil seal, apply a
thin coat of power steering fluid to them.
Make certain that O-rings and oil
seal are
installed properly.
Discard old O-ring and oil
seal and install new
ones Be careful of
oil seal direction.
Wiring Diagram -Oil Pressure Switch
FUSE BLOCK
IGNITION SWITCH
I a
Y
Ln v)
E
ENGINE ROOM E I R HARNESS HARNESS
IWhnsl d'
POWER STEERING OIL PRESSURE
SST222A
ST-1 6

SERVICE DATA AND SPECIFICATIONS (S.D.S.)
Turn of steering wheel (Lock to lock1
General Specifications
28
Steering gear type I [Power PR24S rteerlngl
I Collapsible
Column length L mm lcnl
Non4ilt type
Column lensth "L"
steermg column set
L = 478 7.4803 mm
SST207A
Tilt type Jumping UP
,' Tilt UP
L=4787-4803mml1885 1891 ~nl SSTZ08A at steering column Neutral position
Steering o~erall gear ratio I 17 1
Power steering fluid
Automatic transmission fluid "DEXRON type"
P IUS pt. Imp ptl ApProx 0 9 (1-718. 1-5/81
TVpe 1
Capacity
Normal operating temperature 60-80 (140.1761 "C (OF1
-Inspection and Adjustment-
GENERAL
Steering wheel axial play mm Im1 I 0 IO1
Steering wheel play mm (in1 I Less than 35 (1 38)
Power steering system Steering wheel turning force at
360* Position from Neutral
N lkg,Ibl
011 pump belt deflection
(Measured when engine 16 cold1 mm (in1198 N 110 kg.22 Ibl
Less than 39 2 14 0,8 81
New 10.13
(0 39.0 511 Used 13-16
I051 -0631 Limit 21 (0 831 -
Replace belt to new one
6.669.7257 kPa Ikglcm', PSI) I 168.74,967.1 p521
011 pump maximum pressure
011 pressure switch operation
Hydraulnc he pressure Operation kPa 1kglcm'. pro1 I
Increasing to 1,961 .2>42
l20.30,284 - 4271 Turn ON I
I TurnOFF I Decreasing to 981 .2,942 110-30.142-4271 I
ST-1 7