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).
Letter from Automotive Products Company Ltd discussing service instructions for Lockheed hydraulic brakes.
| Identifier | ExFiles\Box 121\1\ scan0252 | |
| Date | 19th April 1940 | |
| THE BRITISH MADE LOCKHEED HYDRAULIC BRAKING SYSTEM Controllers of European Rights Automotive Products Company Ltd Tachbrook Road, Leamington Spa. DIRECTORS: E.{Mr Elliott - Chief Engineer} B. BOUGHTON W. EMMOTT D.{John DeLooze - Company Secretary} T. BROCK Telephone LEAMINGTON SPA 1400 Telegrams AUTODUCTS PHONE LEAMINGTON SPA Registered Office BROCK HOUSE LANGHAM ST.{Capt. P. R. Strong} LONDON W.1 Handwritten notes: M.H.R Brakes Rm{William Robotham - Chief Engineer} (circled) Your Ref: Rm{William Robotham - Chief Engineer}/MHR.{M. H. Rigby}21/JH.18.4.40. 19th April, 1940. Our Ref: PS/FGP/VFB. Messrs. Rolls-Royce Limited, DERBY. Attention:- Mr. Rigby. Dear Sirs, In reply to your letter with regard to service instructions for cars fitted with Lockheed Brakes, we should not normally consider it necessary to either bleed or flush the system after a mileage of 10,000. The writer has had personal experience of cars which have run 60 - 70,000 miles without any attention to the brakes apart from keeping the reservoir reasonably full of fluid, and the normal adjustments to the shoes which are required from time to time. However, as you doubtless wish to give instructions which would ensure the system being maintained in perfect order in all circumstances we would suggest that at 30,000 miles it might be desirable to dismantle the master cylinder and examine cups and other parts for wear. On reassembling the system would, of course, be bled and flushed through in the ordinary way. We think that at 60,000 miles it would be desirable to examine the wheel cylinder cups which might by this time be showing some signs of wear. We would point out that the brake does not require bleeding at stated intervals and if air gets into the line it would be a case of investigation to find out at what point the air was entering and remedy the defect. We think that as long as the brake pedal is firm in operation with reasonable travel and that there is no abnormal loss of fluid from the supply tank that there is no need to dismantle the brakes. -continued- Side text: Quotations and Contracts are subject to revision of Duty, Transportation Costs, and to acceptance by the Factory, also to unforeseen delays arising from strikes, lockouts, transportation, war, &c., and force majeure. | ||