Steering Pump Pressure
- Before starting test, check belt tension, pulley, and tire pressure. Attach Pressure Gauge (ST27091000
) between pump and steering gear. Open shutoff valve on pressure gauge. Bleed air. Warm fluid to 140-176°F (60-80°C).
CAUTION:
Warm engine with shutoff valve fully opened. If engine is started with shutoff valve closed, oil pressure in oil pump will increase to relief pressure, producing abnormal rise in oil temperature.
- Idle engine at 1000 RPM. Measure pressure with steering wheel turned to left and right positions. See HYDRAULIC PRESSURE SPECIFICATIONS
. DO NOT
hold steering wheel in a locked position longer than 15 seconds.
- If oil pressure is less than standard pressure, slowly close shutoff valve and measure pressure. If pressure reaches standard pressure, gear is defective. If pressure remains less than standard pressure, pump is defective.
CAUTION:
DO NOT
close shutoff valve longer than 15 seconds.
- If oil pressure is higher than standard pressure, inspect pump flow control valve. After checking hydraulic system, remove pressure gauge. Add fluid as necessary. Bleed air from system.
HYDRAULIC PRESSURE SPECIFICATIONS
| Application |
psi (kg/cm2
) |
| Main |
1100-1200 (7650-8250) |
| Secondary |
925-1000 (6400-6900) |