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).
Test and inspection report on various vehicle components including the clutch, gearbox, and brakes.
| Identifier | ExFiles\Box 4\9\ 09-page011 | |
| Date | 10th June 1925 guessed | |
| - 3 - edge of the other side. This applies to both springs. As reported, the front springs were continually hitting buffers. The roads over here are in a very poor condition generally, and the test for springing is a very severe one. We do not condemn the O.S except in a very severe case. Clutch. On one run it was inclined to be on the fierce side, but generally it has been smooth in action and we have had no jaggers. We have no trouble with the clutch not stopping when depressed. Gearbox. We have had a bad oil leak from covers at front and rear of the box. We have dismantled these and found at the front that two studs have not been screwed down sufficiently, consequently the shoulders on same were not allowing the cover G.S1595 to seat properly. We have recessed the holes for these bolts. We also found that the ball race Hoff. 330 on the second motion shaft stands slightly proud of the face, and also the reverse shaft containing sleeve G.S153X was also standing slightly proud. We have fitted a paper packing washer to allow for the discrepancies, and will report later whether this has cured the oil leak. The leak from the rear cover G.S159Z was due to a slight burr on the surface. We consider that the spring for the reverse plunger in change speed lever could be of less strength, also we would recommend that plunger top to be slightly more spherical, as one can feel the sharp edge in the palm of the hand. As reported and questioned, the changing of gears is not so easy as in the standard 20 HP. We do not condemn the change speed mechanism. We get the same effect but in a lesser degree than we got on the a.A.C. of the same design, i.e. if one tends to pull the lever backwards in changing, there is a binding effect. On the other hand, if the lever is pushed sideways evenly, the change is quite easy. The gears are fair. We have not had any gears work out up to the present. The reverse gear is poor. The servo has functioned O.K., but one can feel when depressing the foot pedal the action of the servo plates, as if they were not running quite true. We get a slight rattle from servo gears on over-run from 43 m.p.h. to 38 m.p.h. There is no measureable wear on these gears. The servo mechanism is quite O.K. we believe that new cams are being sent out to lessen the tendency of fierce braking. pedals "D" type to L.O.P. F.53506. Spring F.58534 fitted to brake pedal. The pedal bearings are on the slack side. we do not consider that wear has taken place. These are as they were fitted. Starter Motor. This has functioned O.K. Rear Axle & Brake Mechanism. We have dismantled brake drums and found these in good condition, as also are the shoes. we have not noticed any periods from axle, which we consider to be good for | ||