POWER STEERING FLOW AND PRESSURE
The following procedure is used to test the operation of the power steering system on the vehicle. This test will provide the gallons per minute (GPM) or flow rate of the power steering pump along with the maximum relief pressure. Perform test any time a power steering system problem is present. This test will determine if the power steering pump or power steering gear is not functioning properly. The following pressure and flow test is performed using Power Steering Analyzer Tool kit 6815 (3) Adapter Kit 6893 and 6825A.
FLOW AND PRESSURE TEST
CAUTION: The following test procedure involves testing maximum pump pressure output and flow control valve operation. Do not leave valve closed for more than three seconds as the pump could be damaged.
All three readings must be above specifications and within 345 kPa (50 psi) of each other.
- Pressures above specifications but not within 345 kPa (50 psi) of each other, replace pump.
- Pressures within 345 kPa (50 psi) of each other but below specifications, replace pump.
CAUTION: Do not force the pump to operate against the stops for more than 2 to 3 seconds at a time because, pump damage will result.
| ENGINE | RELIEF PRESSURE ± 50 | FLOW RATE (GPM) AT 1500 RPM |
| 3.7L & 4.7L | 9998 kPa (1450 psi) | 2.6 - 3.0 GPM |