| Description | Date | Identifier | |
| Letter discussing the dispatch of an oil pump adaptor and seeking advice on vehicle oiling schedules. | 27th Jun 1929 | Box 27 \ 1 Scan240 | |
| Letter from Price's Patent Candle Company regarding test results and approval for Motorine R lubricant in the Luvax-Bijur system. | 27th Jun 1929 | Box 27 \ 1 Scan241 | |
| Modification to the Bijur pump design to prevent oil leaks. | 6th Jun 1929 | Box 27 \ 1 Scan242 | |
| Confirming lubrication and examination intervals for various vehicle units. | 1st Jul 1929 | Box 27 \ 1 Scan243 | |
| Ten points of attention for the chassis central lubrication system on a 20-EX car. | 1st Jul 1929 | Box 27 \ 1 Scan244 | |
| Letter to Messrs. Luvax regarding experimental adjustments and testing of various drip plugs to improve performance. | 3rd Jul 1929 | Box 27 \ 1 Scan245 | |
| On fitting central lubrication as standard, reducing Enots fittings, and requesting information on 'Zerk' manufacture. | 1st Jul 1929 | Box 27 \ 1 Scan246 | |
| Suggestions to avoid spilling in a Bijur pump and the success of an adaptor. | 14th Jul 1929 | Box 27 \ 1 Scan247 | |
| Letter from Luvax Limited concerning the supply and special production of meter valves for a central lubrication system. | 5th Jul 1929 | Box 27 \ 1 Scan248 | |
| Letter urgently requesting a gearbox oil recommendation from C.C. Wakefield & Co. Ltd. for an instruction book. | 5th Jul 1929 | Box 27 \ 1 Scan249 | |
| Investigation into and solution for Bijur pump oil leaks. | 6th Jul 1929 | Box 27 \ 1 Scan250 | |
| Analysis of pump issues, focusing on spring stress, location, and clearance calculations. | 6th Jul 1929 | Box 27 \ 1 Scan251 | |
| Spring deflection and the theory versus practice of chassis lubrication via drip-plugs. | 30th Jul 1934 | Box 27 \ 1 Scan252 | |
| Lubrication systems, specifically regarding oil congealing in shock dampers and the sizing of drip-plugs. | 30th Jul 1934 | Box 27 \ 1 Scan253 | |
| Letter from C.C. Wakefield & Co. Ltd. arranging a meeting to discuss a problem with Mr. Hives. | 6th Jul 1929 | Box 27 \ 1 Scan254 | |
| Order for two types of drip-plugs from Luvax Ltd. | 8th Jul 1929 | Box 27 \ 1 Scan255 | |
| Suggesting an improved design for securing the Bijur pump cover by using four studs instead of two. | 8th Jul 1929 | Box 27 \ 1 Scan256 | |
| Letter to Messrs. Luvax Ltd. confirming a meeting to discuss central lubrication and an order for experimental drip-plugs. | 8th Jul 1929 | Box 27 \ 1 Scan257 | |
| Improving the design of the Bijur pump cover. | 10th Jul 1929 | Box 27 \ 1 Scan258 | |
| Danger of a cover flying off and referencing a previously unsent note. | 12th Jul 1929 | Box 27 \ 1 Scan259 | |
| Proposal for the adoption of K.T.A. type Duralumin Drip-plugs for the Bijur lubrication system. | 13th Jul 1929 | Box 27 \ 1 Scan260 | |
| Altering connection designs, specifically avoiding the American taper thread and sending samples for investigation. | 13th Jul 1929 | Box 27 \ 1 Scan261 | |
| Blueprint showing a cross-section diagram of a Standard Drip Plug. | 12th Jul 1929 | Box 27 \ 1 Scan262 | |
| Cover page with a Print Room date stamp from Derby. | 12th Jul 1929 | Box 27 \ 1 Scan263 | |
| Oil leak from the studs on a dash-mounted oil pump, suggesting a modification to use cap nuts. | 18th Jul 1929 | Box 27 \ 1 Scan264 | |
| Leaks in a modified Bijur pump and proposing a comparative test method. | 19th Jul 1929 | Box 27 \ 1 Scan265 | |
| Procedures for testing oil pump leaks and proposed modifications to prevent them. | 19th Jul 1929 | Box 27 \ 1 Scan266 | |
| Typed memorandum page discussing retrospective car modifications. | 22th Jul 1929 | Box 27 \ 1 Scan267 | |
| Improvements to the Bijur lubrication system, replacing soldered joints with nut and sleeve connections. | 22th Jul 1929 | Box 27 \ 1 Scan268 | |
| Page 2 of a letter, mentioning an attached copy of another letter from OY. | 10th Jul 1929 | Box 27 \ 1 Scan269 | |
| Letter discussing the advantages of Bijur 'K type' duralumin drip plugs for chassis lubrication. | 10th Jul 1929 | Box 27 \ 1 Scan270 | |
| Request to increase the length of an oil pump adaptor (F.81152) to prevent issues from over-filling. | 23th Jul 1929 | Box 27 \ 1 Scan271 | |
| Modification to the side-steering tube ball ends to improve lubrication and prevent clicking. | 23th Jul 1929 | Box 27 \ 1 Scan272 | |
| Urgent request to replace a leather washer with a felt one on a Bijur pump for the Test Department. | 24th Jul 1929 | Box 27 \ 1 Scan273 | |
| Instructing customers to depress the pump pedal twice before starting and every 100 miles. | 24th Jul 1929 | Box 27 \ 1 Scan274 | |
| On the routing of the S.S. central lubrication pipe to the front spring to avoid damage from stones. | 24th Jul 1929 | Box 27 \ 1 Scan275 | |
| Suggesting the clutch trunnion on the 20 HP car be connected to the bijur pump for lubrication. | 17th Aug 1929 | Box 27 \ 1 Scan276 | |
| Side wheel carriers for the 20 HP chassis with centralised lubrication. | 19th Aug 1929 | Box 27 \ 1 Scan277 | |
| List of recommendations from the Experimental Department regarding the standardisation of the central lubrication system. | 2nd Sep 1929 | Box 27 \ 1 Scan278 | |
| List of modifications for ball ends and a pipe for a rear shock absorber on a 20 HP model. | 14th Sep 1929 | Box 27 \ 1 Scan279 | |
| Persistent oil leaks from pumps related to the central lubrication scheme, despite previous modifications. | 14th Sep 1929 | Box 27 \ 1 Scan280 | |
| Requesting the fabrication of parts and modification of a Bijur pump lid, based on attached sketches, to redirect leaking oil. | 4th Sep 1929 | Box 27 \ 1 Scan281 | |
| Inquiry regarding the effect of cold weather on the centralised lubrication system for a 20 HP model. | 16th Sep 1929 | Box 27 \ 1 Scan282 | |
| The effectiveness of the centre point lubrication system in cold versus hot weather. | 17th Sep 1929 | Box 27 \ 1 Scan283 | |
| Modifications to a Bijur pump to address oil leaks. | 24th Sep 1929 | Box 27 \ 1 Scan284 | |
| Alteration instructions for the 20 HP centralized lubrication system and front axle. | 26th Sep 1929 | Box 27 \ 1 Scan285 | |
| Proposal to prevent oil spillage from the dashboard pump and increase the number of bolts securing the tank. | 27th Sep 1929 | Box 27 \ 1 Scan286 | |
| Letter from Luvax Limited requesting an interview to discuss the question of central lubrication. | 2nd Oct 1929 | Box 27 \ 1 Scan287 | |
| Letter to Messrs. Luvax Ltd. arranging a meeting to discuss central lubrication. | 4th Oct 1929 | Box 27 \ 1 Scan288 | |
| Request for three more Bijur pumps for modification and testing to address oil leaks. | 17th Oct 1929 | Box 27 \ 1 Scan289 | |
| Letter from C.C. Wakefield & Co. regarding a trial for a new central chassis lubrication oil to be named Swanshot 'S' Lubricant. | 18th Oct 1929 | Box 27 \ 1 Scan290 | |
| Requesting information on a central lubrication system, specifically regarding Bijur's drip plugs and olive joints. | 9th Oct 1929 | Box 27 \ 1 Scan291 | |
| The condition of Chassis No. 12-EX and a recommendation for its sale. | 19th Oct 1929 | Box 27 \ 1 Scan292 | |
| Recommended improved parts for incorporation into the Phantom II production model. | 15th Oct 1929 | Box 27 \ 1 Scan293 | |
| Technical discussion on proposed modifications for the radiator, central lubrication, and shock absorbers. | 15th Oct 1929 | Box 27 \ 1 Scan294 | |
| Shock absorber joint issues, load adjustments, and resulting wear. | 22th Oct 1929 | Box 27 \ 1 Scan295 | |
| Modification using a new leather washer to prevent oil leaks from Bijur pumps. | 22th Oct 1929 | Box 27 \ 1 Scan296 | |
| Tests and proposed solutions for an oil pump leakage problem. | 22th Oct 1928 | Box 27 \ 1 Scan297 | |
| Modifications to a Bijur pump to prevent oil from reaching passengers. | 22th Oct 1928 | Box 27 \ 1 Scan298 | |
| Solutions for oil leaks from Bijur pumps. | 24th Oct 1929 | Box 27 \ 1 Scan299 | |
| Letter from C.C. Wakefield & Co. Ltd. to Rolls-Royce Ltd. regarding a trial of their central chassis lubricating oil. | 29th Oct 1929 | Box 27 \ 1 Scan300 | |
| Instruction to modify three Bijur pumps belonging to the Test Department. | 29th Oct 1929 | Box 27 \ 1 Scan301 | |
| Diagram showing modifications to a Bijur pump to prevent oil from reaching passengers. | 29th Oct 1929 | Box 27 \ 1 Scan302 | |
| Letter to C.C. Wakefield & Co. Ltd. regarding the trial of 'Swanshot S' oil for chassis lubrication and discussion on suitable gear box oils. | 11th Nov 1929 | Box 27 \ 1 Scan303 | |
| Letter to C. C. Wakefield & Co. Ltd. advising against recommending an additional special oil for the chassis system. | 11th Nov 1929 | Box 27 \ 1 Scan304 | |
| Standardisation of chassis parts relating to the Bijur lubrication system for the 20 HP car. | 26th Mar 1929 | Box 27 \ 1 Scan305 | |
| Chassis number, test date, and material costs for fitting a new part. | 15th Apr 1929 | Box 27 \ 1 Scan306 | |
| Reverting to a hexagon oiling plug from an Enots lubricator on an experimental 20/25 HP long chassis car. | 26th Nov 1929 | Box 27 \ 1 Scan307 | |
| Central lubrication, requesting information and pricing on Bijur compression unions and drip plugs. | 12th Dec 1929 | Box 27 \ 1 Scan308 | |
| Updated procedures for the Bijur lubrication of axles, addressing oil quantity and pressure. | 1st Jan 1930 | Box 27 \ 1 Scan309 | |
| Improving the chassis lubrication system, focusing on air-vessels and the one-shot system. | 1st Jan 1930 | Box 27 \ 1 Scan310 | |
| Updated instruction on the procedure for lubricating vehicle axles using an oil gun. | 1st Jan 1930 | Box 27 \ 1 Scan311 | |
| Instruction book update regarding the correct procedure for lubricating axles with an oil gun. | 1st Jan 1930 | Box 27 \ 1 Scan312 | |
| Instructions for the periodic charging of axles with oil. | 1st Jan 1930 | Box 27 \ 1 Scan313 | |
| Recommendations for lubricating axles using the Bijur system. | 1st Jan 1930 | Box 27 \ 1 Scan314 | |
| Interim circulation of Depot Sheets before updating Instruction Books. | 1st Jul 1930 | Box 27 \ 1 Scan315 | |
| Method for conveying pressure oil to the rear axle for centralised chassis lubrication. | 1st Jul 1930 | Box 27 \ 1 Scan316 | |
| Two proposals for conveying oil to the front axles for centralised chassis lubrication. | 10th Jan 1930 | Box 27 \ 1 Scan317 | |
| Alternative method for centralised chassis spring lubrication. | 10th Jan 1930 | Box 27 \ 1 Scan318 | |
| Potential modifications to the Bijur lubrication system, specifically pump capacity and the use of solderless dural drip plugs. | 23th Jan 1930 | Box 27 \ 1 Scan319 | |
| Letter detailing the Bijur Lubricating System on the Springfield Chassis, including parts and feeds. | 26th Dec 1929 | Box 27 \ 1 Scan320 | |
| List of lubrication points and piping instructions for various vehicle components, page 2. | 26th Dec 1929 | Box 27 \ 1 Scan321 | |
| The lubrication pathways for various vehicle components, including brakes, suspension, and front axle, along with a list of associated part numbers. | 26th Dec 1929 | Box 27 \ 1 Scan322 | |
| Bill of materials and cost breakdown for a Bijur Tee Type Plug assembly. | 15th Jan 1929 | Box 27 \ 1 Scan323 | |
| Blueprint for a 'KTA' Drip Plug Assembly Type 'K'. | 15th Jan 1929 | Box 27 \ 1 Scan324 | |
| Letter confirming that information regarding central lubrication has been dispatched. | 28th Dec 1929 | Box 27 \ 1 Scan325 | |
| Interview with T.R. Thomas of Bijur discussing chassis lubrication systems for PI and PII models. | 7th Feb 1930 | Box 27 \ 1 Scan326 | |
| Report page discussing lubrication and design of components like propeller shafts, generators, magnetos, and distributors. | 10th Sep 1929 | Box 27 \ 1 Scan327 | |
| Technical note on fan and water pump systems, with detailed figures for a sphere lubrication system. | 10th Sep 1929 | Box 27 \ 1 Scan328 | |
| Different types of chassis lubrication systems, including continuous feed and vacuum-operated oil pumps. | 10th Sep 1929 | Box 27 \ 1 Scan329 | |
| Various chassis lubrication systems, including pump types, tank designs, and warning signals. | 10th Sep 1929 | Box 27 \ 1 Scan330 | |
| Technical discussion on fitting automatic lubrication systems, detailing accumulator options for PI and PII cars and service schemes for the sphere and torque tube. | 10th Sep 1929 | Box 27 \ 1 Scan331 | |
| The effects of low oil levels on the Bijur device and starting a dry oil system. | 20th Feb 1930 | Box 27 \ 1 Scan332 | |
| Four cases of broken Centralised Lubrication Pipes found during final testing and a discussion on potential actions for affected cars. | 20th Feb 1930 | Box 27 \ 1 Scan333 | |
| Connecting tube lubrication tests for 20 HP rear shock dampers. | 25th Mar 1930 | Box 27 \ 1 Scan334 | |
| Test report on reduced oil supply, lubrication, and oil loss measurements on a component. | 28th Mar 1930 | Box 27 \ 1 Scan335 | |
| Centralised chassis lubrication with axles for the Phantom II model. | 28th Mar 1930 | Box 27 \ 1 Scan336 | |
| Requesting various parts be made available for testing. | 7th Apr 1930 | Box 27 \ 1 Scan337 | |
| 50% capacity increase for the dashboard pump and tank for the centralised chassis lubrication system. | 7th Apr 1930 | Box 27 \ 1 Scan338 | |
| Note contrasting the standard Enots system with the full Bijur system for front axle lubrication on L.H. chassis. | 4th Apr 1930 | Box 27 \ 1 Scan339 | |
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