Lexus SC300 / Lexus SC400. Manual — part 314
INSTALLATION
PRE-WELDING MEASUREMENTS
Always take measurements
before installing underbody
or engine components
to insure correct assembly.
After installation, confirm
proper fit.
POST-WELDING REFINISH-
ING
1.
Always check the welded
spots to insure they are
secure.
2.
When smoothing out the
weld spots with a disc
grinder, be careful not to
grind off too much as this
would weaken the weld.
WELDING PRECAUTIONS
1.
The number of welding spots
should be as follows.
Spot weld: 1.3 x No. of
manufacturer’s spots.
Plug weld: More than No. of
manufacturer’s plugs.
WRONG
OKAY
WRONG
2.
Plug welding should be done
with a MIG (Metal Inert Gas)
welder. Do not gas weld or
braze panels at areas other
than specified.
Safety Glass
Body
Measurement
Diagrams
SPOT WELDING PRECAUTIONS
SPOT WELD LOCATIONS
Try to avoid welding over
previous spots.
1.
The shape of the welding
tip point has an effect on
the strength of the weld.
2.
Always insure that the
seams and welding tip are
free of paint.
Old
Spot
Locations
New Spot
Locations
Tip Cutter
INTRODUCTION
IN-13
ANTI-RUST TREATMENT
When replacing body panels, always apply body sealer, anti-rust agent or undercoat according to the re-
quirements of your country.
HINT: For further details, see the description given in Section AR of this manual.
ANTI-RUST AGENT (WAX)
Apply anti-rust agent to
following sections.
Inside of the hems of the
doors and hood.
Around the hinges of the
doors and hood.
Inside of the welded parts
with boxed cross-section.
BODY SEALER
Apply body sealer to the
required areas.
Cartridge
Type
Tube
Type
UNDERCOAT
Apply undercoat to the underbody and
wheel housings.
Spray Gun
Undercoating
(Water base)
Undercoating
(Oil base)
INTRODUCTION
IN-14
N01093
N01094
SUPPORT POSITION
PANTOGRAPH JACK POSITION
Front
Center of suspension crossmember
. . . . . . . .
Rear
Jack up support of differential carrier
. . . . . . . . .
JACK POSITION
Jack
or
Suspension Crossmember
Front
Safety stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VEHICLE LIFT AND SUPPORT LOCATIONS
INTRODUCTION
IN-15
SERVICE SPECIFICATIONS
SERVICE DATA
Thermostat
Valve opening temperature
80–84
°
C
176–183
°
F
Valve lift
at 95
°
C (203
°
F)
10 mm
0.39 in.
Radiator cap
Relief valve opening pressure
STD
74–103 kPa
(0.75–1.05 kgf/cm, 10.7–14.9 psi)
Limit
59 kPa
0.6 kgf/cm
8.5 psi
On–vehicle
i
ti
f
h
Oil pressure
1,177–2,452 kPa
inspection for hy-
draulic cooling
(12–25 kgf/cm, 171–356 psi)
draulic cooling
fan
fan
Hydraulic pump
Spool valve
45.8 mm
1.803 in.
Rotor side clearance
STD
Drive rotor
0.02 mm
0.0008 in.
Driven rotor
0.03 mm
0.0012 in.
Limit
Drive rotor
0.03 mm
0.0012 in.
Driven rotor
0.04 mm
0.0016 in.
Rotor body clearance
STD
0.05–0.09 mm
0.0020–0.0035 in.
Limit
0.10 mm
0.0039 in.
Rotor tip clearance
STD
0.02 mm
0.0008 in.
Limit
0.03 mm
0.0012 in.
Drive shaft bushing inside diameter
17.00–17.05 mm
0.6693–0.6713 in.
Drive shaft diameter
16.97–16.98 mm
0.6681–0.6685 in.
Drive shaft oil clearance
STD
0.02–0.08 mm
0.0008–0.0031 in.
Limit
0.08 mm
0.0031 in.
Drive shaft preload (rotating torque)
0.3 N
⋅
m
3.0 kgf
⋅
cm
2.6 in.
⋅
lbf
Solenoid valve resistance
at cold
7.5–8.5
Hydraulic motor
Rotor side clearance
STD
0.01–0.04 mm
0.0004–0.0016 in.
Limit
0.05 mm
0.0020 mm
Drive shaft hole inside diameter
14.000–14.011 mm
0.5512–0.5516 in.
Drive shaft diameter
13.973–13.984 mm
0.5501–0.5506 in.
Drive shaft oil clearance
STD
0.016–0.038 mm
0.0006–0.0015 in.
Limit
0.04 mm
0.0031 in.
Drive shaft preload (rotating torque)
0.3 N
⋅
m
3.0 kgf
⋅
cm
2.6 in.
⋅
lbf
Water temp.
Resistance
at 80
°
C (176
°
F)
1.48–1.58 k
sensor
CO–64
–
COOLIING SYSTEM
Service Specifications
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