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).
Failures and conditions of vehicle components including lubrication, springs, and brakes.
| Identifier | ExFiles\Box 5a\3\ 03-page035 | |
| Date | 9th February 1921 guessed | |
| -6- bijur lubrication to the front axle failed owing to the soldered junction of the feed pipe on the N.S. spring coming adrift. This same feature failed on 25-MX.{John H Maddocks - Chief Proving Officer} It would appear that the soldered joint is not sufficiently strong to withstand the movement of the front spring. The lubrication also partially failed supplying the O.S. pivot. This was due to the felt filter being too thick, i.e. compressed too much, which restricted too much the amount of oil passing through it. We reduced the thickness to overcome this trouble. Throughout the mileage, the front brakes have remained efficient and silent it has not been necessary at this mileage to adjust them. The condition of the brake shoes and drums are very good. FRONT ROAD SPRINGS. O.S. N.S. Drawing No. 7.56311. 7.56311. Loaded lbs. 725 lbs. 720 lbs. Initial Camber. 4.5" 4.5" Material. S/SLM. S/SLM. The front road springs have been examined and do not show any signs of fracture. The lubrication of the leaves has been fairly even. There are slight high marks on the tips of the leaves where the load is greatest. We had to reduce the buffer clearance to 1.5" to prevent the botter bracket of the shock dampers from hitting the springs. We have not since noticed any hard hitting of the buffers through having the lesser clearance. REAR ROAD SPRINGS. O.S. N.S. Drawing No. 7.57132 7.57142 Loaded lbs. 1075 lbs. 1050 lbs. Initial Camber. 5.9" 5.9" Material. S/SLM. S/SLM. From outside examination the rear road springs show no signs of fracture, and the lubrication is satisfactory. The spring clips have been tried several times with no sign of slackness having developed. BIJUR LUBRICATION TO REAR AXLE. We have had two occasions of failure of the bijur supply to the rear axle. The failures were due to the banjos feeding the brake actuating shafts becoming loose. The evidence shows that this was caused by stones hitting same. FRONT SHOCK DAMPERS to LOP.F.57208. REAR SHOCK DAMPERS to LOP.F.57889. | ||