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).
Maintenance instructions for the ignition coil, spark plugs, battery, lamps, and speedometer.
| Identifier | ExFiles\Box 168a\4\ img176 | |
| Date | 15th May 1940 | |
| -5- -cont'd- RM{William Robotham - Chief Engineer}/RC.{R. Childs}8/JMc.15.5.40. Ignition Coil. The coil requires no attention beyond being kept clean, and the terminals tight. Remove H.T. connections and clean, if necessary. (4) Sparking Plugs. The plugs should be cleaned and tested on one of the standard machines sold for that purpose. Most large garages have such a machine and will service plugs at a small cost. The gap should be reset to .025 inches. (5) Battery. The battery terminal posts, and the cable lugs should be well washed with ammonia, removing all corrosion and compressed grease, after which they should be thoroughly rinsed with water. The top and sides of the battery should also be washed down with clean cold water and dried: first make sure that the ven plugs are tightly screwed down. It should be next ascertained that the passages in the vent plug are clean and that the acid level is correct. The battery should then be put on charge at the normal charge rate, and gassed until the cell gravity readings have remained constant for at least one hour. Adjustments of the acid gravity should then be made, if necessary. The gravity of the acid at this stage should be 1.280. When refitting the battery to the car, care must be taken to see that the terminal posts, lugs and battery securing bolts are well covered with vaseline. Where possible it is preferable to dip the part in molten Vase-line. Be sure that the battery and frame connections are tight. (6) Lamps. Lamps should be checked with a view to ensuring that the insulated contact to the lamp bulb has sufficient spring pressure, and that the earth contact is clean and tight. (7) Speedometer. Check for noisy drive and see that it does not cause the pointer of the instrument to oscillate at various -cont'd- | ||