Procedure for pressure testing hydraulic shock dampers for the front and rear of a car.
| Identifier | ExFiles\Box 55\3\ Scan216 | |
| Date | 25th June 1926 | |
| To Sft. {Mr Swift} from Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} c. to Mx. {John H Maddocks - Chief Proving Officer} EP. {G. Eric Platford - Chief Quality Engineer} c. to Wor. {Arthur Wormald - General Works Manager} 4235 Hs {Lord Ernest Hives - Chair} /Rm {William Robotham - Chief Engineer} 2/LG25.6.26. HYDRAULIC SHOCK DAMPERS. 4235 The cases for the hydraulic shock dampers to be fitted to the front of the car should be tested to a pressure of 300 lbs/sq.in. Those to be fitted to the rear of the car to 450 lbs/sq.in. It is important that when the shock dampers are initially filled, all air should be excluded from the system before the cap covering the high pressure valve is finally placed in position. [Blueprint Diagram Text] To TYRE PUMP PRESSURE GAUGE OIL LEVEL FOR TEST UP TO CAP FACE. RUBBER WASHER The glands should be subjected to a bench test before the shock damper leaves the Fitters. For this test the shock damper should be filled with oil to the level of the cap face. A special cap should then be fitted carrying a tyre valve and pressure gauge connection. A thick rubber washer should be fitted to the cap face. The pressure under the cap should be raised to 150 lbs/sq.in. and the shock damper contd :- | ||
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).