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).
Inspection report detailing findings on a rear axle, propellor shaft, and starter motor.
| Identifier | ExFiles\Box 101\2\ scan0052 | |
| Date | 20th July 1936 guessed | |
| ( I2 ) REAR AXLE. LOP. G.57114 .850" HYPOID AXLE N° 22.G.V.S. 9X41 Phantom III type Centre Casing. Complete to above LOP incorporating:- G.57110 Bevel Pinions } 9 x 41 ratio. R.R.Gears. G.57111 Bevel Wheel G.54469 Differential Casing G.56131 " " G.84519 Inspection Cover in alum. replacing G.82046 S/M.{Mr Moon / Mr Moore} The differential case fractured at 13,270 miles. It was found to be due to a weakness in section for which a modification had already come out, but was not incorporated in our axle. The gears remained silent until the fracture, but the bedding of the teeth was then upset & there is consequently an audible hum at 60 MPH. The new differential case has shown no signs of failure and appears free from cracks. The axle was good in all respects. A slight leak developed from the pinion housing during the latter part of the mileage. The oil level was maintained throughout with none being added. PROPELLOR SHAFT. LOP G.57096. Complete to above LOP to suit .850" Hypoid Axle. G.57025 Propellor Shaft. No.3911 Propellor Shaft Damper. The propellor shaft has remained free from vibration and there has been no loss of oil from the universal joints. It is marked by the 3rd cross member on full spring deflection, even when the buffer clearance was reduced by 1/2", and we think that these impacts must throw a large and unnecessary strain on the splines and universal joints, and they have been sufficent to dent the shaft. Gry.{Shadwell Grylls} What about provision for spline lubrication ? Rm.{William Robotham - Chief Engineer} A general roughness in the transmission developed at the end of the mileage, and it was found that the splines in the sliding joint had seized. There was no lubricant present. There is no provision made for lubrication at this point, and the instruction book states that no attention is necessary between chassis overhauls. The universal joints were lumpy and tended to spring back to the central position, but examin-ation of the needle roller bearings and races did not reveal any great wear. It will be recalled that a new propellor shaft was fitted at 9,737 miles for the same reasons. ELECTRICAL EQUIPMENT. Starter Motor. LOP DB.{Donald Bastow - Suspensions}1098. Complete to the following:- Armature LOP DB.{Donald Bastow - Suspensions}1077. Bearing Brackets LOP DB.{Donald Bastow - Suspensions}1078. Commutator LOP DB.{Donald Bastow - Suspensions}306. Frame & Filed Winding LOP DB.{Donald Bastow - Suspensions}432. EL.267 Bush. Engagement has been positive with no signs of sticking and no trouble has been experienced. | ||