Subaru Impreza 2003 Service Manual page 2709

3. HYDRAULIC PRESSURE
NOTE:
• Be sure to complete all items aforementioned in
"INSPECTION", prior to measuring hydraulic pres-
sure. Otherwise, pressure can not be measured
correctly. <Ref. to PS-89, INSPECTION, General
Diagnostic Table.>
• Do not leave the valve of pressure gauge closed
or hold the steering wheel at stop end for 5 seconds
or more in any case, as the oil pump may be dam-
aged due to long keep of these conditions.
• Put a cotton cloth waste at a place where fluid
drops before the pressure gauge is installed. Wipe
off split fluid thoroughly after the measurement.
1) REGULAR PRESSURE MEASUREMENT
(1) Connect the ST1, ST2 and ST3.
ST1 92511000 PRESSURE GAUGE
ST2 34099AC020 ADAPTER HOSE B
ST3 34099AC010 ADAPTER HOSE A
(2) Remove the air intake duct.
(3) Disconnect the pipe C from the pump.
(4) Using the gasket (Part No. 34621AC021)
and bolt (Part No. 34620AC010), install the ST2
to the pump instead of pipe C.
(1)
(1) Bolt A
(2) Pipe C
(3) Pipe D
(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.
OIL PUMP
(2)
(3)
PS-00432
PS-85
POWER ASSISTED SYSTEM (POWER STEERING)
(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 , 896 — 994 psi)
2.0 L Non-turbo model, 2.5 L model:
6,767 — 7,453 kPa
2
(69 — 76 kg/cm , 981 — 1,081 psi)
2.0 L Turbo model:
7,350 — 8,036 kPa
2
(75 — 82 kg/cm , 1,067 — 1,165 psi)
(4) If it is not within the specified value, replace
the oil pump.
PS-00152
, 142 psi) or less
PS-00153