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).
Instructions for fitting adjusting washers, the operation of front shock dampers, and related service maintenance.
| Identifier | ExFiles\Box 108\2\ scan0144 | |
| Date | 2nd September 1938 | |
| -9- Rm{William Robotham - Chief Engineer}/Cr.{Mr Cra???ster / Mr Chichester}8/MH.{M. Huckerby}2.9.38. Fitting Adjusting Washers. Top. The adjusting washers A Fig. should be of such a thickness as to allow .004 - .008 sideways movement of the yoke piece C when bolt D is tightened up. The adjusting washers should both be of the same thickness. Bottom. The adjusting washers F Fig. should be so chosen as to be of equal thickness, and to make a tight fit between the ball pin H and the jaws of the lower triangle, so that when nut J is tightened the triangle jaws nip the ball pin. Front Shock Dampers. The front shock dampers as already mentioned are built in unit with the front spring housing. The operation of the dampers will be understood by reference to Figs. , and The damper and spring housing A is filled with oil. The damper piston B works backwards and forwards in the damper cylinder C, being actuated by means of the upper triangle lever D which is in the form of a bell crank lever, with rollers bearing on the plate E of the piston. Figs. and show the damper valves etc. in detail. When the spring F is compressed by the flange E, the piston displaces the oil in chamber G and forces it up the tube H, Fig. , lifting the valve I, and discharging it down the passages J and K into chamber L. When the piston returns with the spring from the compressed position, the oil flows in the opposite direction, this time the valve M which is free to slide on valve I, is forced open, and in turn lifts valve I. Spring loaded replenishing valves N and O feed chambers G and L from the outer spring housing P. Service Maintenance. It is unlikely that any trouble will be experienced with these dampers in serivce, should, however, complaints arise of lack of damping, or failure of dampers, it is possible that the valve M is sticking on valve I, or that there may be dirt on the valve seats, in which case the oil should be drained out, the springs removed as Continued. | ||