| Description | Date | Identifier | |
| Scheme for air vessels in the pivots of the 20 HP front axle for the centralised chassis lubrication system. | 27th Mar 1929 | Box 27 \ 1 Scan140 | |
| Proposal for a centralised chassis lubrication reservoir for the SS and 20 HP models. | 27th Mar 1929 | Box 27 \ 1 Scan141 | |
| Letter from Luvax Limited regarding arrangements for the central lubrication of a 20 HP chassis. | 3rd Feb 1932 | Box 27 \ 1 Scan142 | |
| Letter to Messrs. Luvex Ltd. regarding a delay in sending an experimental 25 HP car due to no available chassis. | 4th Feb 1932 | Box 27 \ 1 Scan143 | |
| Letter to Luvax Ltd. arranging the fitting of a Bijur System to a 25HP car. | 23th Feb 1932 | Box 27 \ 1 Scan144 | |
| Request to issue a standardisation sheet for using Luvax Bijur fittings on the 20/25 HP chassis centralised lubrication system. | 28th Mar 1933 | Box 27 \ 1 Scan145 | |
| Confirming the receipt of a consignment of Castrol 'R' oil. | 2nd Apr 1929 | Box 27 \ 1 Scan146 | |
| Supply of a specific Enots Oil Gun for the 3-point central lubrication system, avoiding the high-pressure intensifier. | 3rd Apr 1929 | Box 27 \ 1 Scan147 | |
| Letter discussing issues with Bijur drip plugs, cross steering fouling, and bent cutout control tubes. | 3rd Apr 1929 | Box 27 \ 1 Scan148 | |
| Continued communication discussing various vehicle faults including drip plugs, silencer pipe, spring drive, and petrol gauge. | 4th Apr 1929 | Box 27 \ 1 Scan149 | |
| Letter from C.C. Wakefield & Co. Ltd. regarding the non-delivery of a Castrol oil order in France. | 4th Apr 1929 | Box 27 \ 1 Scan150 | |
| Letter chasing an undelivered order for three gallons of Castrol 'R' Oil for delivery to France. | 3rd Apr 1929 | Box 27 \ 1 Scan151 | |
| The supply of Enots oil guns without intensifiers for centralised chassis lubrication systems. | 4th Apr 1929 | Box 27 \ 1 Scan152 | |
| Suggestion regarding the capacity and placement of an air reservoir for the 20 HP chassis front axle. | 5th Apr 1929 | Box 27 \ 1 Scan153 | |
| Outlining the procedure for installing the Bijur central lubrication system, delegating final connection to the Test Department. | 5th Apr 1929 | Box 27 \ 1 Scan154 | |
| Letter providing technical advice on troubleshooting the Bijur central lubrication system. | 5th Apr 1929 | Box 27 \ 1 Scan155 | |
| Internal memorandum discussing a lubrication scheme for the ball on the cross steering lever. | 4th Apr 1929 | Box 27 \ 1 Scan156 | |
| Letter from C.C. Wakefield & Co. regarding the delayed delivery of Castrol 'R' oil and the dispatch of a replacement order. | 6th Apr 1929 | Box 27 \ 1 Scan157 | |
| Letter to Messrs. Benton & Stone Ltd. regarding a trial of flexible tubing for shock absorbers. | 8th Apr 1929 | Box 27 \ 1 Scan158 | |
| Requirement and procedure for testing the flow of Bijur drip plugs for central lubrication systems. | 4th Apr 1939 | Box 27 \ 1 Scan159 | |
| Letter to Messrs. Luvax Ltd. regarding the testing of drip plugs and the suitability of lubricating oil. | 10th Apr 1929 | Box 27 \ 1 Scan160 | |
| The amount of oil for D.2, D.1, and D.O. central lubrication drip plugs. | 11th Apr 1929 | Box 27 \ 1 Scan161 | |
| Letter from Luvax Limited regarding the flow rates and production methods for meter valves. | 15th Apr 1929 | Box 27 \ 1 Scan162 | |
| Letter from Luvax Limited discussing the development of meter valves and a comparison of Luvax and Castrol 'R' oils. | 18th Apr 1929 | Box 27 \ 1 Scan163 | |
| Letter regarding central lubrication, axle reservoirs, a new pump, and the use of Castrol 'R' oil. | 18th Apr 1929 | Box 27 \ 1 Scan164 | |
| Secret memo regarding the importance of secrecy for modifications such as central lubrication on the 20 HP chassis. | 18th Apr 1929 | Box 27 \ 1 Scan165 | |
| Safety risks of the Bijur System Lubricating Pump and proposing solutions to prevent injury. | 19th Apr 1929 | Box 27 \ 1 Scan166 | |
| Choice of oil for the Bijur lubrication system. | 19th Apr 1929 | Box 27 \ 1 Scan167 | |
| The properties and recommendations for various lubricating oils for chassis, comparing castor and mineral-based oils. | 19th Apr 1929 | Box 27 \ 1 Scan168 | |
| List of required properties for oil used in a central lubrication system. | 19th Apr 1929 | Box 27 \ 1 Scan169 | |
| Comparison of the viscosity of various oils at low temperatures. | 19th Apr 1929 | Box 27 \ 1 Scan170 | |
| The performance and design of a new type of Bijur pump. | 19th Apr 1929 | Box 27 \ 1 Scan171 | |
| Continued memo on pedal operation, addressing issues with air in the system, oil contraction, and reports from Springfield. | 19th Apr 1929 | Box 27 \ 1 Scan172 | |
| Comparison of a pump with a Bijur pump for central lubrication on S.S. and 20 HP models. | 19th Apr 1929 | Box 27 \ 1 Scan173 | |
| The removal of a Hooper Saloon body from an experimental car and its potential future use. | 19th Apr 1929 | Box 27 \ 1 Scan174 | |
| Central lubrication for the 21-EX model car, specifically rear axle reservoirs and drip plug changes. | 19th Apr 1929 | Box 27 \ 1 Scan175 | |
| Recommending pure mineral oils for central lubrication in Phantom, SS, and 20 HP models. | 23th Apr 1929 | Box 27 \ 1 Scan176 | |
| Design and disassembly precautions for the central lubrication pump. | 23th Apr 1929 | Box 27 \ 1 Scan177 | |
| The procedure for a 10,000-mile test of a central lubrication system. | 24th Apr 1929 | Box 27 \ 1 Scan178 | |
| Instructions for testers on chassis lubrication, component examination, mileage-based servicing, and reporting. | 25th Apr 1929 | Box 27 \ 1 Scan179 | |
| Letter discussing the handover of new Luvax drip plugs and reservoirs to Brazzier for feedback. | 25th Apr 1929 | Box 27 \ 1 Scan180 | |
| Letter requesting analysis results for Luvax Bijur oil and posing questions about Castrol 'R' and other castor-based oils for lubrication. | 26th Apr 1929 | Box 27 \ 1 Scan181 | |
| Attaching specification figures for Motorine 'R' and Pure Castor Oil from Messrs. Prices Patent Candle Co. Ltd. | 26th Apr 1929 | Box 27 \ 1 Scan182 | |
| Copy of a letter from Prices Patent Candle Co. Ltd. regarding the properties of Motorine R and pure Castor Oil. | 22th Apr 1929 | Box 27 \ 1 Scan183 | |
| Comparison of specification figures for Motorine R. and B.P. Castor Oil. | 22th Apr 1929 | Box 27 \ 1 Scan184 | |
| New central chassis lubrication scheme, particularly addressing the issue of including the axles. | 27th Apr 1929 | Box 27 \ 1 Scan185 | |
| Proposal for modifying the central oiling system for the front and rear axles, including suggestions for flexible pipes and pump capacity. | 27th Apr 1929 | Box 27 \ 1 Scan186 | |
| Modifications to a one-shot lubrication system, focusing on increasing oil pump and container capacity. | 30th Apr 1929 | Box 27 \ 1 Scan187 | |
| Laboratory report from C.C. Wakefield & Co. analysing a sample of Singer-Luvax Oil and recommending Castrol 'R' as an alternative. | 30th Apr 1929 | Box 27 \ 1 Scan188 | |
| Letter from C. C. Wakefield & Co. Ltd. regarding the use of copper pipes and castor oil as a lubricant. | 30th Apr 1929 | Box 27 \ 1 Scan189 | |
| Query regarding the correct type and make of oil for the 20HP Chassis central lubrication system and axles. | 30th Apr 1929 | Box 27 \ 1 Scan190 | |
| Recommended oils for the Bijur lubrication system for summer and winter use. | 1st May 1929 | Box 27 \ 1 Scan191 | |
| Guidance on the choice of oil and lubrication procedure for the Bijur central lubrication system. | 1st May 1929 | Box 27 \ 1 Scan192 | |
| Number of points for a central lubrication system and comparing it with practices in America. | 1st May 1929 | Box 27 \ 1 Scan193 | |
| Seeking an opinion on the trend of American manufacturers moving away from central chassis lubrication. | 1st May 1929 | Box 27 \ 1 Scan194 | |
| 3-point central lubrication scheme for the 20 HP and S.S. models, and proposing improvements. | 1st May 1929 | Box 27 \ 1 Scan195 | |
| Proposing a design change to drip plug caps for the central lubrication system to prevent oil weeping. | 1st May 1929 | Box 27 \ 1 Scan196 | |
| Revision of the air vessel scheme for the 'SS' centralised chassis lubrication system. | 8th May 1929 | Box 27 \ 1 Scan197 | |
| Letter to C.C. Wakefield & Co. Ltd. discussing the suitability of their oils for gearbox and central chassis lubrication. | 15th May 1929 | Box 27 \ 1 Scan198 | |
| Instructions for cleaning various filters related to the central oiling system at specified intervals. | 16th May 1929 | Box 27 \ 1 Scan199 | |
| Letter from lubricant manufacturer C.C. Wakefield & Co. Ltd. acknowledging correspondence and advising that tests are being carried out. | 17th May 1929 | Box 27 \ 1 Scan200 | |
| Letter from Maurice Olley to E.W. Hives regarding automatic lubrication and a reply from the Bijur Company. | 21th May 1929 | Box 27 \ 1 Scan201 | |
| Letter from Bijur Lubricating Corp. to Rolls Royce of America regarding 3-point lubrication systems. | 16th May 1929 | Box 27 \ 1 Scan202 | |
| Letter discussing the trial of a new central chassis lubrication scheme, the Bijur 'Accumulator'. | 22th May 1929 | Box 27 \ 1 Scan203 | |
| The use of accumulators for chassis and sphere lubrication systems. | 22th May 1929 | Box 27 \ 1 Scan204 | |
| The final page of a letter from the Chief Engineer of the Chassis Division, concerning car components. | 23th May 1929 | Box 27 \ 1 Scan205 | |
| Outlining the necessity to increase the size of drip plugs for the S.S. J.2. series chassis based on test results. | 23th May 1929 | Box 27 \ 1 Scan206 | |
| The chassis condition of 18-EX after 18,000 miles. | 24th May 1929 | Box 27 \ 1 Scan207 | |
| Inspection report detailing the condition of bearings and lubrication for various vehicle components. | 24th May 1929 | Box 27 \ 1 Scan208 | |
| Condition report on the bearings and lubrication of various vehicle components. | 24th May 1929 | Box 27 \ 1 Scan209 | |
| Inspection report on the condition of bearings for rear axle units and brake shafts. | 5th May 1929 | Box 27 \ 1 Scan210 | |
| Oil leak from the Bijur pump and a proposed modification using a smaller washer to fix the fault. | 5th May 1929 | Box 27 \ 1 Scan211 | |
| Letter from a lubricant manufacturer defining the difference between grease and oil. | 25th May 1929 | Box 27 \ 1 Scan212 | |
| Design and sourcing of special Enots nipples for axle lubrication. | 25th May 1929 | Box 27 \ 1 Scan213 | |
| Untested drip plugs for 'O' series chassis and the need for inspection. | 27th May 1929 | Box 27 \ 1 Scan214 | |
| Letter from Melbourne detailing Australian customer feedback on the inefficiency of 'Enots' lubricators compared to 'Zerk' and 'Bosch' systems. | 27th May 1929 | Box 27 \ 1 Scan215 | |
| Vehicle 18-EX after 18,000 miles, focusing on lubrication results and steering tube wear. | 30th May 1929 | Box 27 \ 1 Scan216 | |
| Letter to C.C. Wakefield discussing the suitability of a tested oil and recommending alternative lubrication products. | 3rd Jun 1929 | Box 27 \ 1 Scan217 | |
| Letter to Denton & Stone Ltd. regarding modifications to Enots fittings and rear-axle components. | 3rd Jun 1929 | Box 27 \ 1 Scan218 | |
| Reports of American manufacturers having trouble with central lubrication schemes. | 6th Jun 1929 | Box 27 \ 1 Scan219 | |
| Letter from Rolls-Royce of America discussing the trend towards automatic lubrication, mentioning a reply from Bijur Co. | 21th May 1929 | Box 27 \ 1 Scan220 | |
| Letter from Bijur Lubricating Corp. to Rolls-Royce America refuting the use of 3-point lubrication systems by US manufacturers. | 16th May 1929 | Box 27 \ 1 Scan221 | |
| Experiments on oil feed to servo cams and bearings, using worsted strands as a metering device. | 1st Jun 1929 | Box 27 \ 1 Scan222 | |
| Reports that American manufacturers were having trouble with central lubrication schemes. | 3rd Jun 1929 | Box 27 \ 1 Scan223 | |
| Letter discussing the trend towards automatic lubrication systems, referencing Cadillac brake gear. | 21th May 1929 | Box 27 \ 1 Scan224 | |
| Letter from Bijur Lubricating Corp. to Mr. M. Olley regarding 3-point lubrication systems. | 16th May 1929 | Box 27 \ 1 Scan225 | |
| Short memo concerning central lubrication, acknowledging that previous information from an informant was incorrect. | 5th Aug 1929 | Box 27 \ 1 Scan226 | |
| Proposal for centralised chassis lubrication on 40/50 and 20 HP models. | 8th Jun 1929 | Box 27 \ 1 Scan227 | |
| Letter from C.C. Wakefield & Co. regarding oil samples, requesting a half-pint of Price's Amber 'A' for testing. | 8th Jun 1929 | Box 27 \ 1 Scan228 | |
| Unresolved issues with lubricators and oil pumps for the 20 HP chassis. | 11th Jun 1929 | Box 27 \ 1 Scan229 | |
| Bijur pump adaptor for the central lubrication system to fix an oil leak. | 13th Jun 1929 | Box 27 \ 1 Scan230 | |
| Ordering and retrospectively fitting new centralised lubrication parts for 20 HP and 40/50 HP chassis. | 14th Jun 1929 | Box 27 \ 1 Scan231 | |
| Required items for the central lubrication system on the 'O' series 20 HP chassis prior to dispatch. | 17th Jun 1929 | Box 27 \ 1 Scan232 | |
| Letter to C. C. Wakefield & Co. Ltd. regarding a sample of low viscosity 'Prices Amber 'A' oil' sent for investigation. | 18th Jun 1929 | Box 27 \ 1 Scan233 | |
| Letter from C.C. Wakefield & Co. Ltd. regarding a sample bottle for the Research Department. | 19th Jun 1929 | Box 27 \ 1 Scan234 | |
| Letter from C.C. Wakefield & Co. Ltd. acknowledging receipt of a bottle containing an oil sample. | 21th Jun 1929 | Box 27 \ 1 Scan235 | |
| Lubrication system for the 20 HP brake equaliser mechanism. | 24th Jun 1929 | Box 27 \ 1 Scan236 | |
| Letter discussing cooling tests and potential modifications for a 20 HP car to prevent overheating in continental conditions. | 25th Jun 1929 | Box 27 \ 1 Scan237 | |
| Shock damper lubrication, steering adjustments, and fuel starvation issues on test vehicles. | 27th Sep 1929 | Box 27 \ 1 Scan238 | |
| Request to arrange for spare felt filters for the central lubrication system on a 20 HP chassis. | 27th Sep 1929 | Box 27 \ 1 Scan239 | |
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