Hydraulic System
- Connect a 1500 psi (100 kg/cm2 ) pressure gauge into the pump pressure line, start engine and allow to idle.
- Turn steering to full lock and exert pressure on steering gear. On Jaguar, pressure should be 1100-1 200 psi (77.5-84.4 kg/cm2
) at idle. On Triumph, pressure should be a minimum of 450 psi (32 kg/cm2
) at idle and 950-1000 psi (67-70 kg/cm2
) at 1000 RPM.NOTE: On Jaguar models, if pressure is below 1100 psi (77.5 kg/cm2 ) at idle, but rises with engine speed increase, problem is either a defective pump control valve or internal leakage in rack and pinion.
- On Triumph, release steering wheel and allow to come off full lock position. Pressure reading should be a maximum of 55 psi (4 kg/cm2 ) at idle.
- If system pressure readings were not to specifications, connect a shut-off valve (JD. 10-2) between pump and pressure gauge. This will isolate steering pump from steering gear and determine if problem is in gear or pump.
- With shut-off valve open, start engine and allow steering fluid to reach normal operating temperature. Close shut-off valve and repeat pressure tests.NOTE: Do not keep shut-off valve closed for more than 5 seconds at a time, otherwise fluid will overheat and damage to system could occur.
- If test pressures are now to specifications, fault is in steering gear. If test pressures are still not to specifications, fault is in pump. Refer to OVERHAUL in this article.