With Variable Assist Steering
Power Steering Flow/Pressure Tester And Fittings:
1. Set up the power steering analyzer as follows for testing the power steering system on a vehicle with variable assist power steering.
a. Connect together Pressure Hose, Special Tool 6713 and 6905, or equivalents.
b. Install Adapter, Special Tool 6866, or equivalent on the end of Pressure Hose, Special Tool 6713, or equivalent.
c. Install Quick Disconnect, Special Tool on the end of Pressure Hose, Special Tool 6959, or equivalent.
d. Install Pressure Hose, Special Tool 6905, or equivalent in the inlet fitting of Pressure/Flow Tester, Special Tool 6815, or equivalent. Install Pressure Hose, Special Tool 6959, or equivalent in the outlet fitting of Pressure/Flow Tester, Special Tool 6815, or equivalent.
2. Check power steering pump drive belt tension and adjust as necessary.
3. Disconnect power steering fluid pressure hose, at power steering pump. Use a container for dripping fluid.
Adapter Fitting Installation:
4. Install Adapter, Special Tool 6972-1, or equivalent in the pressure fitting on the power steering pump. Install Adapter; Special Tool 6972-2, or equivalent in the banjo fitting on the power steering fluid pressure hose. Install Nut, Special Tool 6972-3 on Adapter, Special Tool 6972-2 in banjo fitting, or equivalents.
CAUTION: Pressure Gauge, Special Tool 6815, or equivalent is to be installed in series with power steering pressure hose, between power steering pump and steering gear. It must also be installed so it is in correct direction of the fluid flow.
Power Steering Flow/Pressure Test Connected To Power Steering Pump:
5. Connect inlet hose on Pressure/Flow Tester, Special Tool 6815 to pressure fitting on power steering pump using Adapter, Special Tool 6866 that was installed in Pressure Hose, Special Tool 6713, or equivalents.
6. Connect outlet hose on Pressure/Flow Tester, Special Tool 6815 to Adapter, Special Tool 6972-2 installed in power steering pressure hose using Quick Disconnect, Special Tool, or equivalents.
7. Completely open valve on Special Tool 6815, or equivalent.
8. Start engine and let idle long enough to circulate power steering fluid through flow/pressure test and get air out of fluid. Then shut off engine.
9. Check power steering fluid level, and add fluid as necessary. Start engine again and let idle.
10. Pressure gauge should read below 862 kPa (125 psi), if above, inspect the hoses for restrictions and repair as necessary. The initial pressure reading should be in the range of 345 - 552 kPa (50 - 80 psi). The flow meter should read between 1.3 and 1.6 GPM.
CAUTION: The following test procedure involves testing power steering pump maximum pressure output and flow control valve operation. Do not leave valve closed for more than 5 seconds as the pump could be damaged.
11. Close valve fully three times and record highest pressure indicated each time. All three readings must be above specifications and within 345 kPa (50 psi) of each other.
NOTE: Power steering pump maximum relief pressure is 8240 to 8920 kPa (1195 to 1293 psi.).
- If power steering pump pressures above specifications but not within 345 kPa (50 psi) of each other, then replace power steering pump.
- If pressures; within 345 kPa (50 psi) of each other but below specifications, then replace power steering pump.
CAUTION: Do not force the pump to operate against the stops for more than 5 seconds at a time because, pump damage will result.
12. Open test valve. Turn steering wheel to the extreme left and right positions until against the stops, recording the highest indicated pressure at each position. Compare pressure gauge readings to power steering pump specifications. If highest output pressures are not the same against either stop, the steering gear is leaking internally and must be replaced.