Hydraulic System Pressure Test
NOTE:
Hydraulic system pressure test information for Turbo Diesel models is not available from manufacturer.
- Remove pump reservoir cover and draw off fluid with syringe. Remove high pressure hose from pump. Connect High Pressure Tester (124-589-06-21-00 ) and Adapter Kit (201-589-02-63-00 for 190E and 300 Series (gasoline), 124-589-19-63-00 for 420SEL and 560 Series) inline between pump and high pressure hose. Fill reservoir to cast-in mark.
- With engine idling and tester valve open, measure circulating pressure. DO NOT turn steering wheel during measurement. Pressure should NOT be greater than 73 psi (5.13 kg/cm2 ).
- Raise engine speed to 1000 RPM. Close tester valve for maximum of 5 seconds to measure maximum pressure. See POWER STEERING PUMP MAXIMUM PRESSURE table. If pump maximum pressure is not as specified, rebuild or replace pump assembly.
POWER STEERING PUMP MAXIMUM PRESSURE
| Model | psi (kg/cm2 ) | ||
|---|---|---|---|
| 190E | (1) | ||
| 300 Series (Gasoline) | 1590-1600 (112-113) | ||
| 300D Turbo Diesel & 350 Series | (1) | ||
| 420SEL & 560 Series | 1185-1195 (83-84) | ||
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