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).
Parts summary for modifying the 20/25 HP chassis crankcase and crankshaft.
| Identifier | ExFiles\Box 103\3\ scan0180 | |
| Date | 31th August 1933 | |
| To C/RB{R. Bowen} (strikethrough) c. AEM (strikethrough) c. Rawhide (strikethrough) c. BY/Min (strikethrough) c. HS{Lord Ernest Hives - Chair} X5010. BY/CS7/EH.31.8.33. Re 20/25 HP. CHASSIS - SUMMARY OF PARTS REQUIRED FOR FITTING STUDS INSTEAD OF BOLTS FOR SECURING BEARING CAPS IN THE CRANKCASE. ALSO STIFFER CRANKSHAFT AS USED ON 3½ LITRE BENTLEY. STANDARDISATION X.No.5010 & 4633. NEW PARTS. OLD PARTS. Section 5000 - Crankcase & Bearings. G.73346 Washer(Bearing Conn.) 7 off. E.54782 Lock Washer 7 " E.54793 Lock Washer( " Cap 14 " replaces K.4608 E.57424 Dowel(Bearing Bushes) 13 " " E.18857 E.57860 Swivel Plug(Brg: Cap 7 " E.57861 Connection ( " " ) 7 " E.B.92 End Cover 1 " replaces E.56600 E.B.93 1 " " E.56601 E.B.105 Stud (Bearing Cap) 14 " " E.54639 E.B.106 Oil Pipe (Bearings) 7 " " E.50120 E.B.610 Bearing Cap (Front) 3 " " E.52503 E.B.611 Bearing Cap (Inter) 4 " " E.54752 E.B.612 Bearing Bush(Inter) 8 " " (E.56120 (E.54625 E.B.613 " " (Front & Central) 4 " " E.55123/4 E.B.614 " " (Rear Bottom) 1 " " E.55121 E.B.791 " " (Rear Top) 1 " " E.55122 E.B.625 Bearing Liner (Front & Central). 4 " " E.55125 E.B.626 " " (Inter) 8 " " E.54626 E.B.627 " " (Rear) 2 " " E.55126 K.4010 Nut(Bearing Cap Studs) 14 " " K.4210 E.19198 Lock Washer 7 off E.50112 Snug 14 " E.50114 Oil Tube 7 " E.50116 Oil Pipe Conn. 7 " E.50117 Cap Nut 7 " Section 5010 - Crankshaft. LCP. E.B.45 Complete replaces LCP.E.57620 Complete. BY/CS. | ||