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).
Guide to shock absorber settings and a troubleshooting table for suspension issues.
| Identifier | ExFiles\Box 55\4\ Scan027 | |
| Date | 1st February 1927 guessed | |
| SHOCK ABSORBERS. For all average running, the best shock absorber setting is 35 - 40 lbs. on the rear and 28 to 32 lbs. on the front. If a car is to be used under widely varying conditions, better results will be obtained by altering the damper loading to suit these conditions. Briefly, when driving at low speeds, a small friction setting is all that is required from the dampers. At high speeds such as will be attained in Continental touring, both the steering and roadholding qualities of the car will be improved if the shock absorber loading is increased. A number of quite ordinary suspension troubles can be eliminated by attention to the shock absorbers, the following tabulated list indicating what may be expected. COMPLAINT. Harsh riding at low speeds. Chassis rattles and body rattles. Fore and aft pitching at speed. Front of the car dips and bobs. Steering wheel oscillates at high speeds and front of car unsteady. Steering selectiveness poor. Car rolls on corners and has a general feeling of instability. Passengers suffer from sickness. PROBABLE CAUSE. Shock absorbers set at too high a loading. Tyre pressures too high. Front shock absorbers insufficient loading. Try increasing loading by turns until improvement noted. Check front tyre pressures. Rear shock absorber loading insufficient. Rear tyre pressures too low. Increase loading on rear dampers by quarter turns until trouble overcome. An approximate method of adjusting the shock absorbers is as follows :- contd :- | ||