Subaru 2004 IMPREZA Service Manual page 40

POWER ASSISTED SYSTEM (POWER STEERING)
(5) Install the ST3 to end of pipe C removed
from pump.
(6) Replenish power steering fluid up to the
specified level.
(7) Open the valve, and start the engine.
(8) Measure the regular pressure.
ST1 925711000 PRESSURE GAUGE
ST2 34099AC020 ADAPTER HOSE B
ST3 34099AC010 ADAPTER HOSE A
Service limit:
2
981 kPa (10 kg/cm
(9) If it is not within the specified value, replace
the troubled part caused by the following symp-
toms; pipe or hose clogged, leaks from fluid line,
and mix of foreign objects in fluid line.
2) Measure the relief pressure.
(1) Using the STs, measure the relief pressure.
(2) Close the valve.
(3) Measure the relief pressure.
ST1 925711000 PRESSURE GAUGE
ST2 34099AC020 ADAPTER HOSE B
ST3 34099AC010 ADAPTER HOSE A
Service limit:
1.6 L model:
6,174 — 6,860 kPa
2
(63 — 70 kg/cm
2.0 L Non-turbo model, 2.5 L model:
6,767 — 7,453 kPa
2
(69 — 76 kg/cm
2.0 L Turbo model:
7,350 — 8,036 kPa
2
(75 — 82 kg/cm
PS-00152
, 142 psi) or less
PS-00153
, 896 — 994 psi)
, 981 — 1,081 psi)
, 1,067 — 1,165 psi)
Oil Pump
(4) If it is not within the specified value, replace
the oil pump.
3) Measure the working pressure.
(1) Using the STs, measure the working pres-
sure.
(2) Open the valve.
(3) Measure the working pressure of control
valve by turning wheel from stop to stop.
ST1 925711000
ST2 34099AC020 ADAPTER HOSE B
ST3 34099AC010 ADAPTER HOSE A
Service limit:
1.6 L model:
6,174 — 6,860 kPa
(63 — 70 kg/cm
2.0 L Non-turbo model, 2.5 L model:
6,767 — 7,453 kPa
(69 — 76 kg/cm
2.0 L Turbo model:
7,350 — 8,036 kPa
(75 — 82 kg/cm
(4) If it is within the specified value, measure
the steering effort. <Ref. to PS-90, MEASURE-
MENT OF STEERING EFFORT, INSPECTION,
General Diagnostic Table.> If it is not within
specified value, replace the control valve itself or
control valve and pinion as a single unit with new
ones.
PS-84
PRESSURE GAUGE
PS-00152
2
, 896 — 994 psi)
2
, 981 — 1,081 psi)
2
, 1,067 — 1,165 psi)