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 inspecting, adjusting, and replacing dynamo brushes and their connections.
| Identifier | ExFiles\Box 26\2\ Scan123 | |
| Date | 19th July 1917 guessed | |
| -9- Contd. Brushes. At intervals the dynamo and cover should be removed and the commutator and brushes inspected. Deposits of brush dust or moisture should be suitably removed. In time the brushes wear down, and it becomes necessary to re-set the spring pressure, which setting is provided for in three stages. When the amount of wear is such that the top of a brush has become flush with the top of its holder, the spring pressure should be set up to the second notch. When, further, the top of the brush has become lower than the top of its holder by half the possible amount, the second re-adjustment of spring pressure should be effected. A spare set of brushes is provided with each chassis. Should it become necessary to fit these it is important, by means of fine glass paper drawn to and for round the commutator, with its rough side in contact with the brush, to secure proper bedding. The dynamo should then be allowed to run light for several miles before supplying current. Connections. When the disconnection of the dynamo cable connections to the dynamo terminals is to be effected, great care should be taken to ensure their correct replacement, (S see p.2.) The same remarks, of course, apply to disconnection of the dynamo cable at the switchbox. | ||