|Sludge in a Silver Shadow hydraulic reservoir (c) JE Robison Service|
|A restored RR363 hydraulic reservoir from a Silver Shadow (C) JE Robison Service|
And when the reservoir is filled, be sure to use the RR363 fluid that's made special for these cars. Ordinary brake fluid does not have the castor oil lubricant the brake pumps require, and substitution of a different fluid can lead to brake pump wear and premature failure. That's a failure that's easily avoided - just use the right stuff! It is ok to top these systems with DOT3 fluid in emergency but if that is done the RR363 should be put back in at the earliest opportunity.