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).
Statistical report on vehicle faults and their remedies for various models.
| Identifier | ExFiles\Box 47\3\ Scan077 | |
| Date | 31th March 1931 guessed | |
| -17- 20 HP. 25 HP. PH.I. PH.II. TOTAL. GRAND TOTAL. REMARKS. TAPPETS. March quarter. C.C. - - 3 3 6 ) 8 W.P. - - 1 1 2 ) Previous " 2 - 5 5 12 12 Six months. 2 - 9 9 20 20 TRANSMISSION - REAR AXLE THRUST. March quarter. C.C. 7 - - 4 11 ) 23 W.P. 5 2 - 5 12 ) 20 HP. This can be definitely cured by fitting the thrust race to the latest limits. Ph.II. The limits in this case have been altered to reduce thud on the pick up due to slackness in the pinion bearing. Previous " 21 1 - - 22 22 Six months. 33 3 - 9 45 45 TRANSMISSION - AXLE GEAR NOISY. March quarter. C.C. 3 1 2 1 7 ) 8 W.P. - 1 - - 1 ) Higher oil level on Ph.II. now standard. Previous " 2 - - 4 6 6 Six months. 5 2 2 5 14 14 TRANSMISSION - REAR AXLE OIL LEAK. March quarter. C.C. - - 12 - 12 ) 16 W.P. - - 4 - 4 ) Complaint on Ph.II can be cured by modifying the N/S bearing housing and fitting an air vent. Previous " - - 15 - 15 15 Six months. - - 31 - 31 31 | ||