POWER ASSISTED SYSTEM (POWER STEERING) > General Description
|
Model |
1.5 R |
2.0 R, 2.0 R-S |
WRX, WRX-S |
WRX-SS | |||
|
Whole system |
Minimum turning radius |
m (ft) |
5.3 (17.4) |
5.4 (17.7) | |||
|
Steering angle |
Inner wheel |
37.8°±1.5° |
37.2°±1.5° | ||||
|
Outer wheel |
33.4°±1.5° |
32.9°±1.5° | |||||
|
Steering wheel diameter |
mm (in) |
375 (14.76) | |||||
|
Total gear ratio (turning, from lock position to lock position. gear box) |
2.9 | ||||||
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Gearbox |
Type |
Rack and Pinion, Integral | |||||
|
Backlash |
0 (Automatic adjusting) | ||||||
|
Valve (Power steering system) |
Rotary valve | ||||||
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Pump (Power steering system) |
Type |
Vane pump | |||||
|
Oil tank |
Installed on body | ||||||
|
Specific output |
cm3 (cu in)/rev. |
7.2 (0.439) |
8.5 (0.519) | ||||
|
Relief pressure |
kPa (kgf/cm2, psi) |
6,767 — 7,453 (69 — 76, 981 — 1,081) |
7,350 — 8,050 (75 — 82, 1,066 — 1,167) |
8,100 — 8,800 (83 — 90, 1,174 — 1,276) | |||
|
Hydraulic fluid control |
Engine speed sensitive | ||||||
|
Hydraulic fluid |
L (US qt, Imp qt) |
1,000 rpm: 6.5 (6.9, 5.7) 3,000 rpm: 5 (5.3, 4.4) |
1,000 rpm: 6.3 (6.7, 5.5) 3,000 rpm: 5.9 (6.2, 5.2) |
1,000 rpm: 6.3 (6.7, 5.5) 3,000 rpm: 5.9 (6.2, 5.2) | |||
|
RPM range |
rpm |
680 — 9,800 |
680 — 9,600 | ||||
|
Direction of rotation |
Clockwise | ||||||
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Hydraulic oil (Power steering system) |
Capacity L (US qt, Imp qt) |
Oil tank |
0.2 (0.2, 0.2) | ||||
|
Whole system |
0.7 (0.7, 0.6) | ||||||
|
Steering wheel |
Free play |
mm (in) |
17 (0.67) | ||
|
Steering shaft |
Clearance between the steering wheel and column cover |
mm (in) |
2 — 4 (0.08 — 0.16) | ||
|
Steering gearbox (Power steering system) |
Sliding resistance |
N (kgf, lbf) |
314 (32, 71) or less Difference between right and left sliding resistance: 20% or less | ||
|
Rack shaft play in the radial direction |
Right-turn steering |
mm (in) |
LHD |
0.12 (0.005) or less | |
|
RHD |
Play in the horizontal direction: 0.6 (0.024) or less Play in the vertical direction: 0.4 (0.016) or less | ||||
|
Left-turn steering |
mm (in) |
LHD |
Play in the horizontal direction: 0.15 (0.006) or less Play in the vertical direction: 0.3 (0.012) or less | ||
|
RHD |
0.3 (0.012) or less | ||||
|
Input shaft play |
In radial direction |
mm (in) |
LHD |
0.26 (0.01) or less | |
|
RHD |
0.18 (0.0071) or less | ||||
|
In axial direction |
mm (in) |
LHD |
No play | ||
|
RHD |
0.27 (0.0106) or less | ||||
|
Rotation resistance |
N (kgf, lbf) |
LHD |
Maximum allowable value: 11.3 (1.15, 2.54) or less Difference between right and left rotating resistance: 24% or less | ||
|
RHD |
Maximum allowable value: 13 (1.3, 2.9) or less Difference between right and left rotating resistance: 20% or less | ||||
|
Oil pump (Power steering system) |
Pulley shaft |
Radial play |
mm (in) |
0.4 (0.016) or less | |
|
Axial play |
mm (in) |
0.9 (0.035) or less | |||
|
Pulley |
Ditch deflection |
mm (in) |
1.0 (0.039) or less | ||
|
Rotation resistance |
N (kgf, lbf) |
9.22 (0.94, 2.07) or less | |||
|
Regular pressure (Unloaded) |
kPa (kgf/cm2, psi) |
981 (10, 142) or less | |||
|
Steering wheel effort (Power steering system) |
At standstill with engine idling on paved road |
N (kgf, lbf) |
29.4 (3.0, 6.6) or less | ||
|
At standstill with engine stalled on paved road |
N (kgf, lbf) |
294.2 (30, 66.2) or less | |||
|
Recommended power steering fluid |
|
SUBARU ATF or equivalent |
|
Whole system |
Minimum turning radius |
m (ft) |
5.3 (17.4) |
|
Steering angle |
Inner wheel |
37.2°±1.5° | |
|
Outer wheel |
32.9°±1.5° | ||
|
Steering wheel diameter |
mm (in) |
375 (14.76) | |
|
Lock-to-lock revolution number |
3.1 | ||
|
Gearbox |
Type |
Rack & pinion type | |
|
Backlash |
0 (Automatic adjusting) | ||
|
Motor (outside temperature 20°C) |
Rated voltage |
V |
12 |
|
Rated torque |
N·m (kgf-m, ft-lb) |
4.7 (0.48, 3.47) | |
|
Rated revolution speed |
rpm |
1,140 | |
|
Rated current |
A |
84 | |
|
Rated output |
W |
561 | |
|
Steering wheel |
Free play |
mm (in) |
17 (0.67) | ||
|
Steering shaft |
Clearance between the steering wheel and column cover |
mm (in) |
2 — 4 (0.08 — 0.16) | ||
|
Steering gearbox (Power steering system) |
Sliding resistance |
N (kgf, lbf) |
314 (32, 71) or less Difference between right and left sliding resistance: 20% | ||
|
Rack shaft play in the radial direction |
Right-turn steering |
mm (in) |
Horizontal play: 0.6 (0.024) or less Vertical play: 0.4 (0.016) or less | ||
|
Left-turn steering |
mm (in) |
0.4 (0.016) or less | |||
|
Input shaft play |
In radial direction |
mm (in) |
0.18 (0.0071) or less | ||
|
In axial direction |
mm (in) |
0.27 (0.0106) or less | |||
|
Rotation resistance |
N (kgf, lbf) |
Maximum allowable value: 13 (1.3, 2.9) or less Difference between right and left sliding resistance: 20% | |||
|
Steering wheel effort (Power steering system) |
At standstill with engine idling on paved road |
N (kgf, lbf) |
29.4 (3.0, 6.6) or less | ||
|
At standstill with engine stalled on paved road |
N (kgf, lbf) |
294.2 (30, 66.2) or less | |||