Hydraulic Systems
This section covers special precautions, including system contamination test procedures, for the hydraulic systems of Rolls-Royce models.
Important Warnings
Use only Hydraulic System Mineral Oil (LHM) to replenish the braking and levelling systems. Do not use brake fluids or any other type, as it will cause component failure.
Always ensure that components are suitable for a mineral oil system and that no foreign matter enters the systems during work.
Depressurizing the System
Open the bleed screw on both accumulators and allow sufficient time for the mineral oil pressure to discharge back to the reservoir.
Switch on the ignition and check that the facia warning panels are illuminated.
To depressurize the rear suspension struts, place a bleed tube to the struts bleed screw and open it, allowing the hydraulic system mineral oil to bleed into a clean container until the flow ceases.
Manual:
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