Subaru 1600 Service Manual page 532

STEERING SYSTEM
*7
Grinding noise
Vane pump aeration Inspect and retighten fluid
(continuous)
line connection.
While engine is running
Refill fluid and vent air.
1 Vane pump seizing
Replace Oil pump
Pulley bearing seizing
r--
Assy
of Oil pump Assy
Folded hose, flat pipe
Replace
Squeal, squeak.
Maladjustment of V belt Adjust or
While engine is running.
Damaged or chared replace
V belt
Run out or soilage of
V-groove surface of Clean or
Oil pump pulley or Idler
replace
pulley
Grease shortage for
I
Apply grease I
Idler pulley
Sizzling noise I Fluid aeration
Fix wrong part
I
(continous)
causing aeration.
while engine is running
Replace fluid
and vent air
Damaged tapered seat in
Gearbox Assy or Replace
J
Connector
Abnormal inside of hose Rectify
or pipe.
or replace
Flat hose or pipe
*8 Oil pump makes whine or growl noise slightly due to its mechanism. Even if the noise can be heard when steering wheel is
turned at standstill there is no abnormal function in the system provided that the noise eliminates when the car is running.
*9 When stopping with service brake and/or parking brake applied, power steering can be operated easily due to its light
steering effort. If doing so, the disk rotates slightly and makes creaking noise. The noise is generated by creaking between
the disk and pads. If the noise goes off when the brake is released, there is no abnonnal function in the system.
*10 There may be a little vibration around the steering devices when turning steering wheel at standstill, even though the
component parts are properly adjusted and have no defects.
Hidraulic systems are likely to generate this kind of vibration as well as working noise and fluid noise because of conbined
conditions, i.e.,
Road surface and tire surface, Engine speed and turning speed of steering wheel, Fluid temperature and braking condition.
This phenomena does not indicate there is some abnormal function in the system.
The vibration can be known when steering wheel is turned repeatedly at various speeds from slow to rapid step by step with
parking brake applied on concrete road and in "D" range for automatic transmission vehicle.
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