Measurement Of Steering Effort; Check Steering Effort; Check Steering Wheel Effort; Check Universal Joint - Subaru 2001 FORESTER Service Manual

Power Assisted System (Power Steering)

2. MEASUREMENT OF STEERING EFFORT

No.
1

CHECK STEERING EFFORT.

1) Stop the vehicle on a concrete road.
2) Start the engine.
3) Idle the engine.
4) Install spring scale on the steering wheel.
5) Pull spring scale at an right angle to the
steering wheel, and measure both right and
left steering wheel effort.
NOTE:
When turning steering more quickly than nec-
essary from a direction to the other direction
at an engine speed over 2,000 rpm, steering
effort may be heavy. This is caused by flow
characteristic of oil pump and is not a prob-
lem.
2 CHECK STEERING EFFORT.
1) Stop the engine.
2) Pull spring scale at an right angle to the
steering wheel, and measure both right and
left steering wheel effort.
3

CHECK STEERING WHEEL EFFORT.

1) Remove universal joint.
2) Measure steering wheel effort.
4 CHECK STEERING WHEEL EFFORT.
Measure steering wheel effort.
5

CHECK UNIVERSAL JOINT.

Measure folding torque of the joint (short
yoke). <Ref. to PS-29 INSPECTION, Univer-
sal Joint.>
6 CHECK UNIVERSAL JOINT.
Measure folding torque of the joint (long
yoke). <Ref. to PS-29 INSPECTION, Univer-
sal Joint.>
7 CHECK FRONT WHEEL.
8 CHECK TIE-ROD ENDS.
Remove the tie-rod ends.
9 CHECK BALL JOINT.
10 CHECK GEARBOX.
Measure rotating of gearbox. <Ref. to PS-50
TURNING RESISTANCE OF GEAR BOX,
INSPECTION, Steering Gearbox.>
11 CHECK GEARBOX.
Measure sliding of gearbox. <Ref. to PS-49
SERVICE LIMIT, INSPECTION, Steering
Gearbox.>
GENERAL DIAGNOSTIC TABLE
Step
Is the steering effort 29.4 N
(3.0 kgf, 6.6 lb) or less?
Is the steering effort 29.4 N
(3.0 kgf, 6.6 lb) or less?
Is the maximum force
steering wheel effort 2.26 N
(0.23 kgf, 0.51 lb) or less?
Is the fluctuation width 1.08
N (0.11 kgf, 0.24 lb) or
less?
Is the folding torque 8.43 N
(0.86 kgf, 1.90 lb) or less?
Is the folding torque 5.49 N
(0.56 kgf, 1.23 lb) or less?
Are front wheels for
unsteady revolution or rat-
tling and brake for drag-
ging?
Are tie-rod ends of suspen-
sion for unsteady revolution
or ratting?
Are ball joints of suspen-
sion for unsteady revolution
or ratting?
Is rotating resistance is
11.18 N (1.14 kgf, 2.51 lb)
or less around center posi-
tion and 15.79 N (1.61 kgf,
3.55 lb) or less in all posi-
tions within 20% difference
between clockwise and
counterclockwise?
Is rotating resistance is 304
N (31 kgf, 68 lb) or less
with 20% difference
between left and right
direction?
PS-106
S601257A1002
Check
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
Go to step 6.
Go to step 7.
Inspect, readjust
and replace if
necessary.
Inspect and
replace if neces-
sary.
Inspect and
replace if neces-
sary.
Go to step 11.
Steering effort is
normal.
Yes No
Adjustment back-
lash.
Adjustment.
Check, adjust and
replace if neces-
sary.
Check, adjust and
replace if neces-
sary.
Replace with new
one.
Replace with new
one.
Go to step 8.
Go to step 9.
Go to step 10.
Readjust
backlash, and if
ineffective,
replace bad parts.
Readjust
backlash, and if
ineffective,
replace bad parts.