TC Series Vane Type

Fig. 2 Connecting Pressure Test Equipment:

1. Ensure drive belt tension is correct, then place a drip pan under engine and disconnect pump high pressure hose at steering gear. Hold hose end raised above reservoir to prevent fluid loss.
2. Connect one side of a suitable pressure test gauge to pump high pressure hose with an adapter, then the other side of gauge to power steering pump with an adapter hose as shown. Ensure that test gauge is connected in fluid high pressure circuit between pump and steering gear.
3. Open test valve completely, fill fluid reservoir with power steering fluid as necessary, then start engine and allow fluid to reach normal operating temperature of approximately 170°F.
4. Observe pressure test gauge, pressure should be within specifications. Refer to "Power Steering Pressure Specifications."
5. If pressure is greater than specified, check hoses for restrictions and repair as necessary.
6. Close test valve completely for 2-4 seconds, then immediately open. Repeat this procedure three times and record maximum pressure indicated on pressure test gauge each time test valve is closed. Do not leave valve closed for more than 5 seconds, pump could be damaged.
7. Compare maximum indicated pressures. If pressures are within specifications and variance of three indicated pressures are within 50 psi of each other, pump is operating properly.
8. If maximum indicated pressures are greater than specified and are not within 50 psi of each other, flow control valve is not functioning properly. Remove and clean valve.
9. If maximum indicated pressures are within specifications and within 50 psi of each other, open test valve completely, then turn wheels to extreme left and right positions to force pump to operate against steering "stops."
10. Record pressure at each extreme position, then compare extreme left and right pressures with previously recorded maximum pressures. If pump maximum output pressure are not repeated when pump is forced to operate against either "stop," steering gear is leaking internally and must be disassembled and repaired.
11. Shut engine Off, remove test equipment, reconnect pressure hose, then perform repairs if necessary.