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).
Starter motor, ammeter, and speedometer issues and their respective solutions.
| Identifier | ExFiles\Box 161a\2\ scan0086 | |
| Date | 10th December 1937 | |
| - 2 - (2). Incorrect adjustment of Starter Switch. Starter Motor. i.e. Sequence in-correct and/or main switch points too wide. This means that travel of armature is too great to be overcome by teaser current. (3). Damaged Starter Gear Rings. The damage is caused by the second application of the starter switch before the starter motor pinion has ceased to revolve. The above items are to be dealt with thus :- (1). Replace Carbon Brush with latest design of Pigtail. (2). Starter switch sequence should be checked (Works are now testing this before switches are fitted to chassis). Switch contacts to be adjusted to within drawing limit .465 + 10 - 15 (3). Design investigation is to be made to find a scheme which will cut down to a minimum the time taken for the pinion to come to rest. When a flywheel has been damaged in this manner it may not always be necessary to replace the gear ring, the local damage might be rectified by trimming up. When extreme cases of this type of failure arise the fitting of the long type starter pinion should be considered. The importance of not making a second attempt to start, after a false start cannot be over-emphasized. The attention of all drivers and owners of Phantom lll chassis should be drawn to this (see Phantom lll Instruction book No. Xl, page 107). Ammeters. Phantom lll. The makers accept the responsibility for replacement of the 499 defective instruments now in the Works. The question of the replacement of the ammeters now in service on 1937 cars is to be taken up with the makers by BY/RD. Speedometers. Defective trip recording. All instruments where this trouble is experienced are to be returned to the makers for correction. | ||