92Rocky-SR-Steering-Part1
| 
| 
PART 1 - PART 2 - PART 3 - PART 4 - PART 5 - PART 6 - PART 7 - PART 8 - PART 9
|
|
DAIHATSU Ro c ku
STEERING
OUTLINE OF STEERING SYSTEM SR- 2 TROUBLESHOOTING SR- 9 IN-VEHICLE INSPECTION SR-10 STEERING WHEEL SR-22 STEERING COLUMN SR-29 STEERING LINKAGE SR-53 STEERING GEAR HOUSING SR-66 VANE PUMP SR-80
|
|
STEERING
OUTLINE OF STEERING SYSTEM
The steering gear box employs a recirculating ball typ
optional equipment.
bsorption type. Furthermore, a tilt steering is available as optional
The steering column employs an impact absorption typ
equipment.
ists of a pitman arm, a relay rod, an idler arm and tie rods.
The steering linkage consists of a p
ball type. Furthermore, the power steering is available as
Pitman arm
Tie rod
Relay rod
Idler arm
Steering specifications
item
Specifications
_ I Inner Turmng angle degrees
Outer
Minimum turning radius
5.8 (18.4)
SR-2
|
|
STEERING
STEERING GEAR BOX
As regards the steering gear box, the manual steering (recirculating ball type) is standard, where as the power steering (integral type) is optional.
Manual type
Power steering
Steering gear box specifications
Mama' TYI09 I Power steerifng
Type
Recirculating ball type I Integral typéa
Upper limit ' 480 cc
|
|
STEERING
POWER STEERING
The power steering consists of the following components: A vane pump which generates hydraulic pressure, an integral type gear box which detects a force being applied to the steering system, controls the hydraulic pressure and converts the hydraulic pressure to a mechanical power, an oil reservoir which stores hydraulic fluid, and those hoses, pipes, etc. linking these components.
NOTE:
i
o The illustration shows the vehicle without the rear ABS. (See page SR-80.)
|
|
VANE PUMP
The vane pump consists of a cam ring, a pump rotor, vanes and so froth. A flow control valve which controls the fluid flow rate according to the revolution speed is incorporated at the rear section of the pump
Suction port
Section port of vane pump
J 1 :D
ti L:
Cross section of flow control valve
Discharge port Suction port
(_
Cam ring Rotor
Cross section A-A
Flow control spool
Vane pump specifications
Revolution speed used
500 - 7000
Control discharge rate
(mer/min) I
Relief set pressure
Power steering fluid
Ambient temperature
-40- 120
STEERING
|
|
STEERING
POWER STEERING GEAR BOX
Operation principle
The Vi and V2 ofthe No. 1 flap valve are direction controlling valves, which switch the oil passage to either P-a-R or R-b-P, according to the movement of the steering wheel. The V3 and V4 of the No. 2 flap valve are pressure controlling valves, which determines pressures at the points “a” and “b” according to steering. When the steering wheel is in the neutral position, all those valves of V1, V2, V3 and V4 are open and there is no difference in pressure between the points "a" and When the steering wheel is turned to the right, the V1 closes, V2 and V3 open and V4 almost closes. The hydraulic pressure at the point “Io” (in the cylinder) increases. Then the piston is pushed to the left in the figure, thus assisting the driver’s steering effort. The greater the steering effort, the smaller the opening of the V4, thus increasing the pressure at the pint
When the steering wheel is turned to the left, the power steering operation is reverse to that of (3).
Torsion shaft
Piston
Vane pump P
|
|
STEERING
COMPONENTS
NOTE:
o This illustration
below typically indicates those com
ponents of power steerin
g-equipped model.
7,0 - 14.0
50.7 -101.2. 68.6
3.5 - 5.5
25
12.0 - 17.0 (aaa - 122.9 1177 _ 166.7)
5.0 - 7.0 (36.2 - 50.6 49.0 - 68,6)
A
®
12.0 - 17.0 (86.6 -122,9, 117.9 - 166.7)
II] : Tightening torque Unit : kg-m(f1-lb,N-m) * : Non reusable parts
®
|
|
G) Steering wheel cover Steering wheel sub assembly © Energy absorbing pad Steering wheel lower cover Hom bottom contact plate © Hom bottom contact plate N02 Horn pad sub assembly Grommet Steering column upper cover Steering column lower cover Steering coiumn housing Steering column upper W/switch bracket Steering column upper attachment plate Tilt steering support sub assembly Steering column upper attachment plate Washer Bott Steering column tube sub assembiy Radial ball bearing Snap ring Snap ring Steering main shaft sub assembly Steering shaft thrust stopper sub assembl Radial ball bearing Q5) Washer Snap ring Coilar Bush Bush Steering column hole cover Hole plug Steering column hole cover shieid Steering intermediate shaft
NOTE:
Clip Oil reservoir-to-pump hose Clip Oil reservoir assembly Cup <39 Pressure feed tube assembly Gasket Vane pump assembly Steering gear housing assembly Cotter pin Steering link joint dust seal GE) Tie rod end sub assembly, RH. Fitting grease Tie rod adjusting tube Idler arm support pin Steering idler arm assembly Dust seal (SD Collar Cotter pin ® Cotter pin Steering relay rod Tie rod assembly, RH. Pitman arm sub assembly Cotter pin Steering link joint seal Cotter pin Tie rod assembly, L.H. Tie rod adjusting tube Q2) Cotter pin Steering link joint dust seal Tie rod end sub assembly, L.H. GE) Grease fitting
v The illustration shows the vehicle without the rear ABS. (See page SR-80.)
|
|
STEERING
TROUBLESHOOTING
Possible causes
Checking points
Hard steering
Hard steering persists even after being jacked up.
Faulty steering gear
Preloacl improperly adjusted
Faulty ball joint
Check steering gear.
Check steering linkage.
Steering effort becomes ' lighter after being jacked up.
Tire size
Front wheels improperly aligned
Check front alignment and tire size,
Check tire air pressure.
Excessive play
.
.
.
.
Steering wheel improperly installed
Faulty steering linkage
Suspension improperly installed
Faulty steering gear
Bush worn
Check steering wheel.
Check steering linkage.
Check suspension.
Check steering gear.
Check steering linkage bush.
Abnormal noise
O
Faulty steering shaft
Faulty steering gear
Faulty steering linkage
Check steering shaft.
Check steering gear.
Check steering linkage.
Check bali joint rattle.
|
|
STEERING
IN-VEHICLE INSPECTION
(Except power steering-equipped models) 1. Check of steering wheel
Move the steering wheel in an axial direction and/or in a perpendicular direction so as to ensure no Iooseness and/or excessive play is present. If any looseness and/or excessive play is present, check the steering wheel for improper installing condition. Repair any defective parts.
2. Check of steering wheel for free play
(1) Set the steering wheel to a straight-ahead state. (2) Turn the steering wheel clockwise and counterciock- wise. Measure the steering Wheel movement at the cir- cumference of the steering wheel which is registered before the steering tires start to be steered. Ensure that this steering wheel play is not more than the specified value. Specified Value: 30 mm (1.18 inches)
If not, check each joint section for excessive play. If the joints are satisfactory, replace the steering gear box. If the joint sections exhibit defects, such as excessive play, replace the defective parts.
3. Check of steering gear box fluid level
(1) Remove the fluid level check plug ofthe steering gear
box. (2) Check the fluid level by inserting a clean screwdriver, etc. from the check hole. Ensure that the height from the fluid level to the upper edge of the check hole conforms to the specified value. Specified Level: 13 - 23 mm (0.51 - 0.91 inch)
lf not, ensure that the steering gear box exhibits no fluid leakage. Replenish the specified fluid to the upper level. Specified Fluid: Gear oil API GL-3, SAE90
lf any fluid leakage is present, replace the steering gear box.
SR-10
