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 the maintenance and testing of the starter motor.
| Identifier | ExFiles\Box 168a\4\ img173 | |
| Date | 15th May 1940 | |
| -cont'd- -2- and the point at which the spring pressure should be measured. (2) Starter Motor. (Photo required). The starter motor should be maintained in a similar manner to the dynamo. To dismantle, remove brush-cover A and remove brushes B from their holders. If the two bolts C are now removed the bracket at the commutator end may be removed and the armature and bracket withdrawn from the opposite end of the carcase. Check main terminal D for tightness and if at all loose, tighten base nut E.{Mr Elliott - Chief Engineer} Take care that in doing this the insulation is not cracked. Field Coils. Treat in the same way as for dynamo. Armature. Treat in the same way as for dynamo. Brushes. The brush spring pressure should be from 1 3/4 to 2 lb. If any brushes are badly pitted and worn, new brushes should be fitted. Care must be taken that these are well bedded to the commutator and slide freely in their holders. (Photo required showing one of the brush springs being tested) Drive. (Photo required). To test drive for slip, hold the pinion in the left hand and rotate the armature with the right hand in an anti-clockwise direction (looking on commutator end). The pinion should slide up the thread and on reaching the end of it, should lock solid with the armature shaft. If the pinion slips, i.e., if the armature can be turned after the pinion has reached the end of its stroke, a new drive will be required. The square thread on the screwed sleeve should be cleaned with a pencil brush which has been dipped in paraffin: a gummy deposit composed of dirty oil, can prevent the pinion from engaging with the flywheel gear. After cleaning, smear with light machine oil. -cont'd- | ||