oil NISSAN 300ZX 1984 Z31 Steering System Workshop Manual

STEERING SYSTEM
I---
SECTION ST
CONTENTS
STEERING SYSTEM . . . ... ..
STEERING COLUMN . . . .... ..
POWER STEERING SYSTEM -Checking - . ..
POWER STEERING GEAR AND LINKAGE
POWER STEERING
OIL PUMP . .. ... ..
SERVICE DATA AND SPECIFICATIONS (S D S ) . . . . . . . .
SPECIAL SERVICE TOOLS . .. .. ..
Refer to section MA for:
CHECKING WHEEL ALIGNMENT
Toe-in
Front wheel turning angle
BASIC MECHANICAL SYSTEM
Checking drive belts
. ST- 2
ST- 4
.. ST- 6
. . ST- 8
ST-14
. .. .. ST-17
. . . ST-20

STEERING SYSTEM
a Fully turn steering wheel to the right and disconnect whole hydraulic line to steering gear ASSY. then remove steering gear
Whenever dirconnecitng hydraulic lines, cover openings to prevent foreign material from entering
a Be careful not to damage hydraulic line connection
a Do not reuse O-ring in hydraulic system.
a When conecting hydraulic line, apply a coat of oil (Automatic transmission fluid "Dexron Type") to O-rings
If disconnecting hydraulic line. always perform leak test and bleed air from line after filling it with oil
a After properly installing steering gear and linkage, check wheel alignment Refer to section MA
ST-2

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 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 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 STEERING OIL PUMP
Diassernbl y
CAUTION:
a The parts which can be disassembled are strict-
ly limited, and never disassemble other parts
than the specified ones.
Disassembly should be performed in
a place as
clean as possible.
Do not use a rag. Be sure to use nylon or paper
cloth.
When disassembling and reassembling, do not
allow any foreign material to enter
or contact
any parts.
a
a
a
1 Make matching marks.
Matchmg marks 4 SSTl27A
2 Remove rear cover
3
CAUTION :
When removing cam case, be sure that the vane
does not come
off the rotor.
Remove O-rings from cam case.
SSTO32A ,
4
a
Remove snap ring, then draw pulley shaft out
Be careful not
to drop pulley shaft.
SST033A
5. Install cam case and rear cover, then remove 011
seal.
Be careful not to damage casing.
0
f
SST034A
6. Remove joint.
0 Be careful not to drop spool.
L spool
SSTOJSA
7. Remove suction pipe, then remove O-ring
ST-1 5

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.)
Tie-rod outer ball joint
Swinging torque N m (kgim. m4b)
- Inspection and Adjustment
(Cont'd)
0 29.2 94
I3 0.30,2 6.26
01 ~~~
Pinion gear
preload
(Ptnlon and rack gear assembly without
fluid1 N m Ikgcm, tn-lbl
Tie-rod inner ball joint 10-78 Swinging torque N m (kgem, in-lb) 110 - 80.8 7 .69 41
__~ ~
Less than 1 2 (12.10)
Axial Dlay mm (in) I 0 IO)
Rack stroke
Pinion
I' ? Pack
Rear housing
Tne-rod innel rocket Tie-rod inner socket
& .l
Unit mm Ion) linder end housina - ICyImder end hourmg sadel SST223A
Tie-rod standard length mm (In)
Inner rocket
8 Standard dimensnn L = 37 5 mm I1 476 ln) e When installing tie-rod or adjusting toe-in, be careful not Io twist boots Toe-in Refer to MA seCtion SST214A
1226- 1863
(12 5.19.276 -41.9) Rack stanmg force at steering center (Pinion and rack gear assembly without
fluid) N (kg. Ib)
Tightening Torque
STEERING COLUMN ~~~~
U"lt Nm kg-m ft-lb
Steering wheel nut 49-59 50-60 36-43
Steering column to
body 9 - 14 09-14 65-101
Hole cover to dash panel 3 .5 03-05 22-36
Columnlaintfixingbolt 32-38 33-39 24.28 (Lower joint, column set)
Jacket lower tube to
34-44 035-045 25-33 steering column clamp
STEERING GEAR & LINKAGE (PR-24s)
Unit Nm kg-m ft-lb
Tie-rod lock nut
Tie-rod inner socket to
rack (With sealant)
Cylinder end housmg
& pinion housmg lock nut
Rear housmg to pman
housing
Rear housing
cover lack
nut
Retainer lock nut
Cylinder tube flare nut
Gear & linkage mounting
Tie-rod
to knuckle arm
78 -98
78 -98
78 - 108
8-12
78.137
39 - 59
20
- 26
29-39
54 -98
80-100
80.100
80.110
08-1 2
80-140
40-60
20-27
30-40
55-100
58.72
58-72
58-80
58-87
Ea - 101
29 -43
14-20
22-29
40 - 72
OIL PUMP
U"lt Nm kg-m ft-lb
Mounting bracket to engine 14. 18
Engine sllnger mounting 14 - 18 bolt
011 pump to mounting 31 .42 bracket (Through bolt)
011 pump casing to 31 -42 rub bracket
Adlusting bar bracket
to 16.21 mounting bracket
Sub bracket to adjusting bar
16 - 21
Pulley lock nut 31 -42
Rear cover fixing bolt 38 - 52
Connector (Spool cover) 69 - 78
Suction piDe to easing 9-12
14-1 8
14-18
33-43
32-43
16-21
16-21
32-43
39-53
70-80
09-12
10-13
10
- 13
23 - 31
23 - 31
12-15
12-15
23.31
28-38
51
-58
65-87
ST-1 8

SERVICE DATA AND SPECIFICATIONS (S.D.S.)
Tightening Torque (Cont'd)
HYDRAULIC LINE AND OIL PRESSURE
SWITCH
U"lt Nm kg-m ft-lb
Lowpressure pipe to 27-39 28-40 20-29
Steering gear
Highpressure pipe to
15-25 15-25 11-18
steering gear
H ig hprerw re pipe 49 - 69 50-70 36-51
connector bolt
(At
011 pump1
011 pressure switch 13.18 13-18 9-13
ST-19