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Hydraulic Pressure Testing
- On all models, disconnect pressure lines from steering gear case and vane pump. Attach pressure gauge with gauge side connected to vane pump.
- Attach valve side of gauge to pressure line. Bleed air from system. Check fluid level. With engine at idle and with valve closed, check fluid pressure.
HYDRAULIC PRESSURE
| Application |
psi (kg/cm2
) |
| Camry |
1066 (75) |
| Celica |
1024 (72) |
| Corolla |
1066 (75) |
| Cressida |
924 (65) |
| Supra |
924 (65) |
| Tercel |
782 (55) |
| Van |
1066 (75) |
NOTE:
Do not keep pressure gauge valve closed for more than 10 seconds. Fluid testing temperature should be 176°F (80°C).
- Open valve fully. Note pressure with engine at idle, and again at 3000 RPM. Pressure difference should be less than 71 psi (5 kg/cm2
). If more, check flow control valve.
- With steering wheel at lock position and pressure valve open, recheck pressure. Pressure should be 782 psi (55 kg/cm2
) for Tercel, 1024 psi (72 kg/cm2
) for Celica, 142-248 psi (10-20 kg/cm2
) for Cressida, and 1066 psi (75 kg/cm2
) for all other models.
- With vehicle on flat surface, turn steering wheel to center position. With engine idling and using a spring gauge, measure steering turning force at steering wheel outer rim, in both directions.
- Turning force should not exceed 12.1 lbs. (5.5 kg) on Corolla and Tercel, or 8.8 lbs. (4.0 kg) on all other models.