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).
Tabulated guide for setting ball pin loads and valve leaks for Phantom II, 20/25 HP, and Bentley 3 1/2 Litre chassis.
| Identifier | ExFiles\Box 151\2\ scan0091 | |
| Date | 16th September 1933 | |
| c. Hw/Mr.Bell. (crossed out) X4698 BY {R.W. Bailey - Chief Engineer} /HSB1/M.16.9.33. PHANTOM II. 20/25 HP. & BENTLEY 3 1/2 LITRE CHASSIS. FRONT AXLE CONTROL DAMPER SEC:716. REAR SHOCK DAMPER SEC:715. In order to make quite clear the requirements for setting the Ball Pin Loads, and Valve Leaks, we herewith give a tabulated list of these loads for each of the above Chassis, and also the memos' containing the original instructions to Works' and Expl: Dept.- CHASSIS. | DAMPER. | VALVE NO: | VALVE LEAKS. | VALVE WASHERS. | BALL PIN LOADS. ---|---|---|---|---|--- Phantom II. In accordance with memos' BY {R.W. Bailey - Chief Engineer} /HSB11/M. 12.5.33. | Front. | F.85238. | One .025 Dia: Hole in Valve. | Valve raised off its seat by .010 Washer No: F.85240. | 80 lbs L.P. BY {R.W. Bailey - Chief Engineer} /HSB1/M. 12.5.33. BY {R.W. Bailey - Chief Engineer} /HSB2/M. 12.5.33. BY {R.W. Bailey - Chief Engineer} /HSB3/M. 12.5.33. | Rear. | F.85238. | One .025 Dia: Hole in Valve. | Valve raised off its seat by .015 Washer No: F.85239. | 80 lbs L.P. 20/25 HP. In accordance with memos' BY {R.W. Bailey - Chief Engineer} /HSB11/M. 11.5.33. | Front. | F.59818. | One .062 Dia: Hole in Valve. | None. | 70 lbs L.P. BY {R.W. Bailey - Chief Engineer} /HSB2/M. 12.5.33. BY {R.W. Bailey - Chief Engineer} /HSB3/M. 12.5.33. | Rear. | F.59818. | One .062 Dia: Hole in Valve. | None. | 70 lbs L.P. Bentley 3 1/2 Litre. In accordance with memos' BY {R.W. Bailey - Chief Engineer} /HSB3/M. 12.9.33. & BY {R.W. Bailey - Chief Engineer} /HSB4/M. 12.9.33. | Front. | FB.728. | None. | Valve raised off its seat by .010 Washer No:F.85240. | 80 lbs | Rear. | FB.728. | None. | None. | 80 lbs The Ball Pin Load is to be obtained before drilling Valve, or inserting Washers. BY {R.W. Bailey - Chief Engineer} /HSB. 42A/3 | ||