Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Legacy 1995-1999 Approved Subaru Legacy 1996 1996 Service Manual MECHANICAL COMPONENTS SECTION STEERING SYSTEM MSA5TCD96L6179
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DIAGNOSTICS 4-3
1. Power Steering
1. Power Steering
1. STEERING CONDITION
Heavy steering Heavy steering Steering wheel Vehicle leads to Poor return of
effort in all range effort at stand still surges when turn- one side or the steering wheel to
ing. other. center
Pulley belt NOT GOOD Fluid line Reform or
1. Unequal length of pulley Adjust or replace. 1. Folded hose replace.
NOT
belts 2. Flattened pipe
GOOD
2. Adhesion of oil and
GOOD
grease
3. Loose or damage of pul-
Tire and rim
ley belt
1. Flat tire Fix or replace.
4. Poor uniformity of pulley NOT
2. Mix use of different tires
belt cross section GOOD
3. Mix use of different rims
5. Pulley belt touches to
4. Abnormal wear of tire
pulley bottom
5. Unbalance of remained
6. Poor revolution of pulleys
grooves
except oil pump pulley
6. Unbalance of tire pres-
7. Poor revolution of oil
sure
pump pulley
GOOD
GOOD
Tire and rim NOT GOOD Front alignment Adjust or
1. Improper tires out of Replace or reinflate. 1. Improper or unbalance retighten.
NOT
specification caster
GOOD
2. Improper rims out of 2. Improper or unbalance
specification toe-in
3. Tires not properly 3. Loose connection of sus-
inflated*1 pension
GOOD GOOD
Fluid NOT GOOD Refill, bleed air, replace or Others Replace, adjust or
1. Low fluid level instruct customer. 1. Damaged joint assembly instruct customer.
NOT
2. Aeration 2. Unbalanced height
GOOD
3. Dust mix 3. One-sided weight
4. Deterioration of fluid
GOOD
5. Poor warming-up of fluid
*2 Measure steering effort.
GOOD
Idling speed NOT GOOD
1. Lower idling speed Adjust or instruct customer.
2. Excessive drop of
idling speed at start
or at turning steering
wheel *3 *1 If tires and/or rims are wider, the load to power steering system is the more. Accordingly, in a
GOOD condition, for example before fluid warms-up, relief valve may work before maximum turning angle.
In this case, steering effort may be heavy. When measured hydraulic pressure is normal, there is
no abnormal thing.
Measure hydraulic pressure. *2 In cold weather, steering effort may be heavy due to increased flow resistance of cold fluid. After
GOOD warming up engine, turn steering wheel from stop to stop several times to warm up fluid. Then if
steering effort reduces normally, there is no abnormal thing.
*3 In cold weather or with insufficient warm-up of engine, steering effort may be heavy due to exces-
Measure steering effort. sive drop of idling when turning steering wheel. In this case, it is recommended to start the vehicle
with increasing engine speed than usual. Then if steering effort reduces normally, there is no
abnormal thing.
83
4-3 DIAGNOSTICS
1. Power Steering
2. MEASUREMENT OF HYDRAULIC PRESSURE
CAUTION:
Be sure to complete all items aforementioned in
"STEERING CONDITION" 4-3 [K101], prior to measur-
ing hydraulic pressure. Otherwise, pressure can not be
measured correctly.
Measure regular pressure at NOT GOOD Flattened pipes or hoses Replace bad parts.
idling with valve opened.
NOT GOOD Leakage of fluid line Replace.
NOT GOOD Obstacle in fluid line Replace fluid or component of
fluid line.
GOOD
Measure relief pressure at NOT GOOD
Poor work of relief valve Replace oil pump.
idling with valve closed.
NOT GOOD
Fluid leakage inside oil pump
NOT GOOD
Excessive wear of vane pump
mechanism
GOOD
NOT GOOD
Measure working pressure of Poor work of control valve Replace valve assembly or
control valve at idling with pinion and valve assembly.
valve opened, turning steering
wheel from stop to stop.
CAUTION:
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