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).
Analysis of a water pump seal and bearings for B.60 and B.80 engines after a 10,000-mile test.
| Identifier | ExFiles\Box 123\5\ scan0207 | |
| Date | 2nd December 1938 | |
| 10/H To By.{R.W. Bailey - Chief Engineer} from Rm{William Robotham - Chief Engineer}/Std. c. Da.{Bernard Day - Chassis Design} c. By/Ald.{F. Allwood - Experimental Design} c. Da{Bernard Day - Chassis Design}/McS. WATER PUMP SEAL & WATER PUMP BEARINGS - B.60 and B.80. We have been running a water pump to SCD.234 (which is fitted with a ball bearing and gland seal identical with that used on all O.K. latest models and also on B.60 and B.80 engines) on 25.G.VI car and this covered over 10,000 miles without any attention and without any water leaks, but then developed a squeak. We accordingly stripped the pump and opened up the bearing which was found to have only a little grease in it, and to be in a very rusty corroded state. This bearing is fitted with Messrs. Skefco's early type grease seal which is known to be unsatisfactory. The gland was examined and found to be in excellent condition, the total wear on the two sealing faces being about .004 to .006" - this being about evenly distributed between the bakelite gland washer and the brass rotor face. Attached photograph indicates condition of gland seal. We think, therefore, that this type of gland is likely to be very satisfactory, but have under test, bearings with a new type of grease seal to stop the loss of lubricant experienced on 25.G.VI car. Examination of bearings and glands on the first two B.60 cast iron engines confirm the above findings. Rm{William Robotham - Chief Engineer}/Std. | ||