| Description | Date | Identifier | |
| Confirming a meeting to discuss faults with S.U. chassis petrol pumps. | 11th Aug 1936 | Box 149 \ 1 scan0271 | |
| Letter from The S.U. Company reporting on the results of pump testing. | 14th Aug 1936 | Box 149 \ 1 scan0272 | |
| Letter from the S.U. Company regarding the design and supply of carburettor float chambers and slow running systems. | 15th May 1936 | Box 149 \ 1 scan0273 | |
| Letter from The S.U. Company regarding the identification markings on Bentley pumps. | 14th Aug 1936 | Box 149 \ 1 scan0274 | |
| Continuation sheet from THE S.U. COMPANY listing instructions for modifications. | 14th Aug 1936 | Box 149 \ 1 scan0275 | |
| Instructions for identifying S.U. Petrol Pumps with obsolete diaphragms. | 14th Aug 1936 | Box 149 \ 1 scan0276 | |
| Letter to The S.U. Company Ltd. regarding the failure and inspection of several pumps. | 17th Aug 1936 | Box 149 \ 1 scan0277 | |
| Page 2 of a letter requesting a dozen German type diaphragms. | 18th Aug 1936 | Box 149 \ 1 scan0278 | |
| Letter from The S.U. Company regarding a pump issue and enclosing diagrams. | 18th Aug 1936 | Box 149 \ 1 scan0279 | |
| Request to manufacture a bracket for a petrol pump to be fitted to 35-EX. | 18th Aug 1936 | Box 149 \ 1 scan0280 | |
| Letter to The S.U. Company Ltd. urging the delivery of high lift pumps for a test car and seeking comment on a buffer suggestion. | 20th Aug 1936 | Box 149 \ 1 scan0281 | |
| Letter from The S.U. Company regarding tests on an experimental pump and carburetter modifications. | 21th Aug 1936 | Box 149 \ 1 scan0282 | |
| Continuation letter from The S.U. Company requesting production suggestions. | 28th Aug 1936 | Box 149 \ 1 scan0283 | |
| Complaints about petrol pump failures on Bentley vehicles. | 28th Aug 1936 | Box 149 \ 1 scan0284 | |
| Letter to The S.U. Company Ltd. regarding customer complaints and requesting more rigid inspection for pumps. | 31th Aug 1936 | Box 149 \ 1 scan0285 | |
| Letter from The S.U. Company regarding issues with pumps, diaphragms and inspection procedures. | 1st Sep 1936 | Box 149 \ 1 scan0286 | |
| Letter to The S.U. Company Ltd. about pump performance, diaphragm shrinkage, and further testing. | 1st Sep 1936 | Box 149 \ 1 scan0287 | |
| Correspondence from The S.U. Company regarding testing of pumps, cushion springs, and supply of impact washers. | 2nd Sep 1936 | Box 149 \ 1 scan0288 | |
| Continuation of a letter from The S.U. Company regarding material corrosion and the supply and testing of various parts. | 3rd Sep 1936 | Box 149 \ 1 scan0289 | |
| The replacement of leaking Bakelite valves with brass valves and addressing noisy pumps. | 3rd Sep 1936 | Box 149 \ 1 scan0290 | |
| Modified clips for S.U. petrol pumps and the receipt of associated spring retainers. | 4th Sep 1936 | Box 149 \ 1 scan0291 | |
| Letter from the S.U. Company to Mr. Royce regarding the failure of pumps due to bakelite valves jamming. | 2nd Sep 1936 | Box 149 \ 1 scan0292 | |
| Telegram regarding the arrival of car bodies in Birmingham. | 4th Sep 1936 | Box 149 \ 1 scan0293 | |
| Letter to The S.U. Company Ltd. regarding the despatch and specifications of pump bodies. | 4th Sep 1936 | Box 149 \ 1 scan0294 | |
| Letter from The S.U. Company regarding a drawing request. | 7th Sep 1936 | Box 149 \ 1 scan0295 | |
| Letter to The S.U. Company Ltd. regarding a misunderstanding over drawings and a request for two pumps. | 8th Sep 1936 | Box 149 \ 1 scan0296 | |
| Complaints and failures of S.U. Petrol Pumps, focusing on diaphragm issues. | 10th Sep 1936 | Box 149 \ 1 scan0297 | |
| Pump diaphragm material issues and complaints regarding noisy pumps. | 10th Sep 1936 | Box 149 \ 1 scan0298 | |
| Alterations to pump components, including valves and diaphragms, to improve performance and reduce noise. | 10th Sep 1936 | Box 149 \ 1 scan0299 | |
| Letter from The S.U. Company regarding noisy petrol pumps caused by air leaks from aluminium washers. | 10th Sep 1936 | Box 149 \ 1 scan0300 | |
| Letter to The S.U. Company Ltd. concerning the trial of aluminium washers for petrol pumps. | 11th Sep 1936 | Box 149 \ 1 scan0301 | |
| Letter from The S.U. Company concerning the development and testing of experimental high-pressure pumps. | 12th Sep 1936 | Box 149 \ 1 scan0302 | |
| Continuation letter from The S.U. Company discussing pump modifications and experimental results. | 12th Sep 1936 | Box 149 \ 1 scan0303 | |
| Continuation of a letter from The S.U. Company regarding experiments on an armature for a Bentley. | 12th Sep 1936 | Box 149 \ 1 scan0304 | |
| Specifications and test results for a High Lift S.U. Petrol Pump to be fitted to model 35-EX. | 12th Sep 1936 | Box 149 \ 1 scan0305 | |
| Letter to The S.U. Company Ltd. regarding modifications and testing of fuel pumps. | 12th Sep 1936 | Box 149 \ 1 scan0306 | |
| Letter to The S.U. Company Ltd. regarding difficulties with an impact washer and high lift pump. | 14th Sep 1936 | Box 149 \ 1 scan0307 | |
| Letter discussing pump modifications for silence and performance, including diaphragm materials and stroke length. | 14th Sep 1936 | Box 149 \ 1 scan0308 | |
| Letter to The S.U. Company regarding the diaphragm material for petrol pumps. | 14th Sep 1936 | Box 149 \ 1 scan0309 | |
| Questioning the decision to reject a material recommendation for S.U. Petrol Pumps. | 14th Sep 1936 | Box 149 \ 1 scan0310 | |
| Letter from The S.U. Company regarding the effect of alcohol fuel on G.3 diaphragms and a planned test on a Bentley. | 15th Sep 1936 | Box 149 \ 1 scan0311 | |
| Letter to Mr. Skinner regarding a leaking 'G' type diaphragm on a 6 cyl. Singer, and the potential effect of 'Discol' fuel. | 15th Sep 1936 | Box 149 \ 1 scan0312 | |
| Report on the petrol pump position, recommending the immediate introduction of S.U. G.2 type material. | 15th Sep 1936 | Box 149 \ 1 scan0313 | |
| Letter from The S.U. Company enclosing copies of correspondence with Major General C.E.E. Curtoys. | 15th Sep 1936 | Box 149 \ 1 scan0314 | |
| Customer complaint letter regarding a faulty petrol pump on a new 3.5 Litre Bentley. | 3rd Sep 1936 | Box 149 \ 1 scan0315 | |
| Letter from The S.U. Company to a customer regarding troubleshooting a faulty pump and engine issues. | 3rd Sep 1936 | Box 149 \ 1 scan0316 | |
| Copy of a customer letter regarding a pump issue and performance problems with a 3.5 Litre Bentley 1936. | 4th Sep 1936 | Box 149 \ 1 scan0317 | |
| Letter from The S.U. Company to Major Gen. C.E.E. Curtoys regarding a delay in sending a Bentley pump. | 5th Sep 1936 | Box 149 \ 1 scan0318 | |
| Copy of a letter from a customer regarding a returned pump and incorrect plugs. | 11th Sep 1936 | Box 149 \ 1 scan0319 | |
| Copy of a letter sent from The S.U. Company to Major C.E.E. Curtoys confirming a car issue has been located. | 15th Sep 1936 | Box 149 \ 1 scan0320 | |
| Letter to The S.U. Company regarding the diaphragm material for petrol pumps, cancelling a previous instruction. | 15th Sep 1936 | Box 149 \ 1 scan0321 | |
| Short memo confirming a telephone conversation regarding action to be taken on petrol pumps. | 16th Sep 1936 | Box 149 \ 1 scan0322 | |
| Issues with S.U. petrol pump diaphragm materials, including shrinkage and reactions to alcohol fuels. | 16th Sep 1936 | Box 149 \ 1 scan0323 | |
| Conversation about fuel types, specifically Discol, used in a 4¼-litre Bentley to avoid misfiring issues. | 17th Sep 1936 | Box 149 \ 1 scan0324 | |
| The delayed changeover to G-3 Zinc Base diaphragms for the S.U. petrol pump due to material supply issues. | 17th Sep 1936 | Box 149 \ 1 scan0325 | |
| Changeover to C-3 zinc base diaphragms for the S.U. petrol pump. | 17th Sep 1936 | Box 149 \ 1 scan0326 | |
| Letter to S.U. Company Ltd. regarding a delayed Bentley pump and requesting more G-3 diaphragms due to stiffness issues. | 18th Sep 1936 | Box 149 \ 1 scan0327 | |
| Material changes and the insistence on a 15,000-mile test for S.U. petrol pumps before standardisation. | 19th Sep 1936 | Box 149 \ 1 scan0328 | |
| Issues with petrol pump diaphragms when using Cleveland Discol fuel and a renewed interest in it due to problems with Ethyl. | 19th Sep 1936 | Box 149 \ 1 scan0329 | |
| Typed memo regarding a discussion with S.U. about petrol pump diaphragms for the Phantom III model. | 21th Sep 1936 | Box 149 \ 1 scan0330 | |
| Letter to The S.U. Company Ltd. concerning the incorrect delivery of 'Seaweed Base Diaphragm assemblies' instead of the requested 'G.2' assemblies. | 23th Sep 1936 | Box 149 \ 1 scan0331 | |
| Letter from a supplier regarding pump trouble, specifically buzzing due to bent blades on 30 HP cars. | 29th Sep 1936 | Box 149 \ 1 scan0332 | |
| Receipt of G.3 Diaphragms for Petrol Pumps from the S.U. Company. | 30th Sep 1936 | Box 149 \ 1 scan0333 | |
| Practice of bending contact support blades on pumps from the S.U. Company. | 30th Sep 1936 | Box 149 \ 1 scan0334 | |
| Letter to The S.U. Company Ltd. concerning pumps with bent blades and blade supports, and enquiring about quietened pumps. | 30th Sep 1936 | Box 149 \ 1 scan0335 | |
| Test results for a pump's performance at varying RPMs, pressures, and oil temperatures. | 30th Jun 1919 | Box 149 \ 2 scan0001 | |
| Extract detailing the assembly of 'E' section parts for chassis 1. EX. | 30th Jun 1919 | Box 149 \ 2 scan0002 | |
| Modifying oil pumps to reduce noise, discussing recesses and gear tooth obliquity. | 26th Aug 1919 | Box 149 \ 2 scan0003 | |
| The design of oil pumps, specifically their gear obliquity and history of no noise complaints. | 29th Aug 1919 | Box 149 \ 2 scan0004 | |
| Forwarding a query about the 40/50 chassis oil sump pipe for further review. | 23th May 1921 | Box 149 \ 2 scan0005 | |
| Letter from C. de Salamanca to CJ. London regarding a design fault with the unprotected sump pipe. | 10th May 1921 | Box 149 \ 2 scan0006 | |
| Extract from a report on oil pump noise issues for cars intended for America. | 6th Jul 1921 | Box 149 \ 2 scan0007 | |
| Extract regarding a suggestion to use skew gears for oil pumps on cars for America. | 1st Jul 1921 | Box 149 \ 2 scan0008 | |
| The decision not to test the Cliffords oil pump and to return it. | 20th Jul 1921 | Box 149 \ 2 scan0009 | |
| Standardisation of chassis parts concerning the improvement of the oil pump cover design. | 24th Sep 1923 | Box 149 \ 2 scan0010 | |
| Follow-up memo regarding the testing status of pumps manufactured by Mr. E. Feuerheerd. | 2nd Nov 1927 | Box 149 \ 2 scan0011 | |
| Covering memo forwarding a letter and enclosure from Mr. E. Feuerheerd regarding his pump. | 5th Nov 1927 | Box 149 \ 2 scan0012 | |
| Letter to E. Feuerheerd concerning a pump report from the Daimler Company and a request for an extension. | 5th Nov 1927 | Box 149 \ 2 scan0013 | |
| Letter from James A. Malcolm enclosing a Daimler report on his lubricating pump and inquiring about test results. | 4th Nov 1927 | Box 149 \ 2 scan0014 | |
| 40/50 Oil Pump tests, with comparison data for a Feuerheerd pump. | 22th Dec 1927 | Box 149 \ 2 scan0015 | |
| Comparison test report of a Feuerheerd pump against a Daimler type gear pump, carried out by Daimler. | 26th Oct 1927 | Box 149 \ 2 scan0016 | |
| Test results for a Feuerheerd oil pump at various RPMs and pressures. | 19th Dec 1927 | Box 149 \ 2 scan0017 | |
| Request for a progress update on pumps supplied for Mr. Feuerheerd. | 6th Dec 1927 | Box 149 \ 2 scan0018 | |
| Requesting an extension of one week to complete testing on Mr. Feuerheerd's pump. | 9th Dec 1927 | Box 149 \ 2 scan0019 | |
| Test report comparing a Feuerheerd oil pump against a standard RR gear pump. | 12th Dec 1927 | Box 149 \ 2 scan0020 | |
| Page 2 of a report comparing the performance and weight of an RR pump versus a Feuerheerd pump. | 22th Dec 1927 | Box 149 \ 2 scan0021 | |
| Blueprint diagram of a Feuerheerd oil pump. | 22th Dec 1927 | Box 149 \ 2 scan0022 | |
| Letter from Stothert & Pitt Ltd inquiring about trials on a rotary displacement pump. | 15th Oct 1928 | Box 149 \ 2 scan0023 | |
| Follow-up letter from Stothert & Pitt Ltd regarding proposed trials for a small rotary displacement pump. | 8th Nov 1928 | Box 149 \ 2 scan0024 | |
| Follow-up letter from Stothert & Pitt Ltd concerning a Rotary Displacement pump sent for examination. | 7th Dec 1926 | Box 149 \ 2 scan0025 | |
| Information regarding a Rotary Displacement pump from Messrs. Stothert & Pitt Ltd. | 12th Dec 1928 | Box 149 \ 2 scan0026 | |
| The testing of a Stothert & Pitt patent rotary pump for oil pumping in car engines. | 17th Dec 1928 | Box 149 \ 2 scan0027 | |
| Recommending a modification to address seizing and scoring of 'SS' engine oil pump bearings. | 1st Jan 1929 | Box 149 \ 2 scan0028 | |
| Modification to Oil Pump Gears, specifically showing oil holes, for Super-Sports models. | 12th Nov 1928 | Box 149 \ 2 scan0029 | |
| Oil pressure characteristics and issues with the S.S. relief valve. | 12th Sep 1929 | Box 149 \ 2 scan0030 | |
| Graph plotting S.S. Oil Pressures against engine RPM for various valve and spring configurations. | 30th Aug 1929 | Box 149 \ 2 scan0031 | |
| Letter from Stothert & Pitt regarding the trial and specifications of a rotary displacement pump. | 18th Jun 1930 | Box 149 \ 2 scan0032 | |
| Letter to Messrs. Stothert & Pitt, Ltd. regarding unsatisfactory test results of a lent pump. | 5th Sep 1930 | Box 149 \ 2 scan0033 | |
| Letter from Stothert & Pitt Ltd. regarding the performance of a rotary displacement pump and offering another for testing. | 8th Sep 1930 | Box 149 \ 2 scan0034 | |
| Investigation into oil pump troubles and the solution of fitting a reservoir on the suction side to cure noise and inefficiency. | 14th Jan 1931 | Box 149 \ 2 scan0035 | |
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