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).
Detailed blueprint of a steering gear assembly for a Cadillac, including components, adjustments, and testing procedures.
| Identifier | ExFiles\Box 125\1\ scan0073 | |
| Date | 29th May 1931 | |
| Title Block: { Company: SAGINAW STEERING GEAR DIVISION, GENERAL MOTORS CORPORATION, SAGINAW, MICHIGAN, U.S.A., Title: STEERING GEAR ASSEMBLY FOR CADILLAC MOTOR CAR CO., Part No.: 260806, Model No.: 27-D-31, Drawn By: E.R.A, Traced By: A.McD., Checked By: Signature, Approved By: Signature, Date: MAY-29-31, Scale: FULL SIZE, Stamp: SUPERSEDED PRINT AUG 11 193? }, Revisions Top Right: [ { Rev: A, Description: TRACED & REVISED, Date: OCT-2-31 }, { Rev: B, Description: WAS 'A'-'B' & 'DD' }, { Rev: C, Description: -260381- ADDED, Date: 10-23-31 }, { Rev: D, Description: 257441-REMOVED }, { Rev: E, Description: NOTE ADDED }, { Rev: F, Description: LOWER LIGHT SHAFT KEYWAY MOVED 180°, Date: Nov. 3, 1931 }, { Rev: G, Description: WAS 2 3/4" BETWEEN KEYWAYS }, { Rev: H, Description: 261105-SLEEVE REMOVED, Date: Nov. 6, 1931 }, { Rev: J, Description: 258850-RETAINER ADDED }, { Rev: K, Description: 259961-PACKING ADDED, Date: Nov. 19, 1931 }, { Rev: L, Description: 259905-RETAINER ADDED, Date: Nov. 20, 1931 }, { Rev: M, Description: WAS 259362, Date: DEC-4-1931 }, { Rev: N, Description: 257525 ADDED, Date: JAN. 29, 1932 }, { Rev: P, Description: LIMITS ADDED } ], Revisions Top Left: [ { Rev: P, Description: WAS 260969. }, { Rev: R, Description: WAS 261144., Date: DEC 17, 1931 }, { Rev: S, Description: WAS 259348. }, { Rev: T, Description: WAS 17 TO 1 RATIO TURNS OF HANDWHEEL, Date: JAN 6, 1932 }, { Rev: U, Description: WAS 3 1/4, Date: MAR 11-32 }, { Rev: V, Description: WAS 20 TO 1 RATIO 4.77 TURNS OF HANDWHEEL }, { Rev: W, Description: WAS 261298, Date: JUNE 22, 1932 }, { Rev: X, Description: WAS 261240 }, { Rev: Y, Description: WAS 261241 }, { Rev: Z, Description: NOTE ADDED, Date: JULY 8, 1932 } , Notes and Instructions: [ Handwritten (red pencil): To remove horn button, Remove this gear & light switch at lower end of assembly, push up so that bad pin 'A' can be removed to release horn button., Handwritten (pencil): A See P letter, Handwritten (red pencil): per instruction of Mr Allen, Handwritten: Sheet #1, (E) DO NOT CLAMP THIS BOLT AT GEAR ASSEMBLY., TWICE SIZE VIEW SHOWING KEYWAY LOCATIONS FROM DRIVERS POSITION WHEN GEAR IS MOUNTED IN CAR, (T)(V) 17 TO 1-RATIO - 4.06 TURNS OF HANDWHEEL FOR 86° TOTAL TRAVEL OF PITMAN ARM, FOR PRODUCTION ADJUSTMENT: UP AND DOWN PLAY ADJUSTMENT OF WORM TO GIVE 2# TO 3# THROUGH TIGHT SPOT ON GEAR A LOAD OF 5# TO 6#, FOR SERVICE ADJUSTMENT: UP AND DOWN PLAY ADJUSTMENT OF WORM TO GIVE 2# TO 3# THROUGH TIGHT SPOT ON GEAR A LOAD OF 4# TO 6#, NOTE-LOADS TAKEN ON RIM OF-19" HANDWHEEL, Z ASSEMBLY TO BE TESTED BY LIFTING & LOWERING A 160 LB. WEIGHT ON A 10 INCH ARM. NO IRREGULARITY IN FEEL WHEN LIFTING OR LOWERING WEIGHT IS PERMISSIBLE., 260806-STEERING GEAR ASSEMBLY LESS PITMAN ARM AND CONTROL, SEE SHEET # 260807-FOR CONTROL ASSEMBLY, ALL PARTS MARKED THUS ⊕ ARE SHIPPED SEPARATE ], Part List: [ 260963-ASSEMBLY, 257525 SPACER (N), 260962-TUBE-SUPPORT, 260970-SHAFT-THRO., 260969-SHAFT-LIGHT (P), 256721-BUFFER-THRO. (G), 256722-BUFFER-LIGHT (G), 236613-BUFFER-SUPPORT (2), 106323-BOLT, 259112-GEAR-THRO., 254528-BOLT, 257483-GEAR-SECONDARY, 257010-STUD, 258822-COVER, 108636-PIN-COTTER, 260381-BUFFER-(1) (C), 256503-SHIM-WHEN REQD., 103320-WASHER(2), 100121-BOLT-(2), 258831-CUP-BRG.(2), 260404-BEARING(2), (Y)(S) 259348-GEAR-WORM, 103867-PLUG, 260342-ASSEMBLY, 258123-HOUSING, 259349-STUD (2), 260317-STUD, 259726-BOLT, 103921-WASHER, 103026-NUT, 260812-ASSEMBLY, 103336-WASHER, 236853-NUT, 260961-ASSEMBLY, 260960-JACKET (H), 104067-RIVET, 261124-BUSHING, 258905-PACKING (R), 258850-RETAINER (J), 259901-PACKING (R), 259905-RETAINER (L), (P)(W) 260969-ASSEMBLY, 260813-SHAFT, 261144-WORM (R)(X), 261109-ADJUSTER, 261163-BUFFER, 261149-NUT, 261152-ASSEMBLY, 260809-HOUSING, 261239-BUSHING (2) (M), 260160-BUSHING-ADJ., 259961-PACKING (K), 259960-RETAINER, 260530-FILLER PLUG, 261115-RETAINER, 257166-GASKET, 239109-PACKING, 260001-PACKING, 261116-KEY, 259009-NUT (3), 259010-WASHER (3), 258936-GASKET, 259068-WASHER, 103027-NUT, 110405-WASHER, 259905-LOCK (2), 259906-ADJUSTER, 260174-LOCK, 259907-BOLT, 259101-BOLT, 259114-WASHER, 259107-NUT, (H) 260810-PITMAN ARM, 256533-WASHER, 258053-SCREW ] | ||