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).
Illustrated instruction manual for the installation and adjustment of a Model-SR Winfield Carburetor.
| Identifier | ExFiles\Box 146\3\ scan0250 | |
| Date | 1st January 1933 | |
| General Instructions for Installing and Adjusting Model-"SR" WINFIELD CARBURETOR Read Carefully DIAGRAM LABELS (TOP SECTION): - AUTOMATIC VALVE IN CHOKE BUTTERFLY - CHOKE BUTTERFLY & SHAFT - F-HIGH SPEED SPRAY TUBE - THROTTLE STOP ADJUSTING SCREW - THROTTLE STOP - G-INTERMEDIATE SPRAY TUBE - C-IDLING BYPASS ADJUSTING SCREW - P-THROTTLE SHAFT - E-THROTTLE - S-TO ENGINE - AIR INTAKE - WORKMANIZED VENTURI - D-RECESS FOR THROTTLE - A-AIR PASSAGES TO SPRAY TUBES - I-IDLING BYPASS ADJUSTING PLUG - PUMP VACUUM PORT - THROTTLE SHAFT BUSHING - VACUUM PORT IN FLANGE - INLET TO HIGH SPEED SPRAY TUBE - INLET TO INTERMEDIATE SPRAY TUBE - CHOKE ELBOW - INTERMEDIATE AIR BLEEDER - HIGH SPEED AIR BLEEDER - OVERFLOW PASSAGE FROM PUMP ADJUSTMENT - PUMP ADJUSTMENT - IDLING ADJUSTMENT - INTERMEDIATE ADJUSTMENT - HIGH SPEED ADJUSTMENT - GAS INLET - FLOAT - GASOLINE - FLOAT LEVEL INSPECTION PLUG - INLET TO CHECK VALVE - CHECK VALVE INLET & OUTLET TO PUMP CHAMBER - PUMP CHAMBER - PUMP CHAMBER VENTING - PUMP DIAPHRAGM - PASSAGE FROM CHECK VALVE TO PUMP DISCHARGE TUBE - VACUUM PASSAGE - PUMP TUBE BASE - HIGH SPEED WELL OUTLET - WELL OUTLET - HIGH SPEED WELL - INTERMEDIATE WELL - PUMP DISCHARGE PASSAGE - HIGH SPEED COMPENSATOR - PUMP DISCHARGE TUBE - VACUUM PORT IN FLANGE - MANIFOLD - THROTTLE ROD - CHOKE CONTROL - CONNECT THROTTLE ROD - CONNECT CHOKE CONTROL - GAS LINE CONNECTION - WINFIELD MODEL-SR - THROTTLE STOP ADJUSTMENT - BOLT CARBURETOR TO MANIFOLD 2) Sectional View of Throttle Chamber & Choke Elbow (DOWNDRAFT) This sectional illustration shows (1) the Three-Stage Carburetion System of the Winfield—Idling, Intermediate, High Speed—each stage representing the equivalent of a carburetor in itself. (2) The Spray Tube System which plays so important a part in distribution, assuring fine fog-like vaporization. (3) The patented Winfield Throttle and Double Venturi arrangement which brings one and then both Venturis into action. 3) Sectional View Float Bowl (DOWNDRAFT) This sectional illustration pictures the new 1933 Winfield development—the Automatic Diaphragm Pump and also the Double Accelerating Well System. The Diaphragm Pump adds New Reserve Power. For ordinary speed and power requirements the accelerating wells supply all needed accelerating mixture but when quick action, sudden speed and emergency power are demanded the Diaphragm acts instantly and automatically. 4) Bolt Carburetor to Manifold (VIEW OF DOWNDRAFT CARBURETOR) Be sure the manifold flange is clean and flat. Do not forget to use a gasket between flange and carburetor. If a gasket of more than 1/32 inch thickness is used care should be taken in tightening the bolts because the flange can be bent or broken by too much pressure or uneven pressure when it is being tightened. 5) Connect Throttle Rod and Choke Control (VIEW OF UPDRAFT CARBURETOR) Connect throttle rod to throttle lever. Be sure that throttle lever is set at the correct angle in relation to throttle rod. See illustration C. Be sure that throttle opens and closes all the way when operated by foot throttle pedal. Now connect the choke control. Be sure choke butterfly is wide open when choke control button is pushed in. Also be sure the choke butterfly is fully closed when choke control button is pulled out. Now connect gas line. 1) THE FIRST STEP — Assemble Carburetor The above Picture shows the Downdraft Winfield Carburetor completely assembled ready to bolt to manifold. For information on how the carburetor is installed on a specific make of car, consult the Winfield catalog. Bolt adapter flange to carburetor throttle chamber, using gasket furnished for this purpose. Fasten choke elbow or straight choke to throttle chamber with special retaining clamp furnished. Adjust choke cable holder to proper angle and tighten retaining screws. Put choke lever on choke butterfly shaft. Hold it against stop and move choke butterfly to wide open position. Then tighten choke lever clamp screw. See illustration B. Bolt float bowl to throttle chamber. Use special gasket furnished for this purpose. SPECIAL NOTICE — FLOATS Because of the great difference in pressure between a gravity fuel feed system and a pump fuel feed system two types of floats are used in the Model "SR" Winfield Carburetor—one type for gravity and one type for pressure. In order that the floats may be easily distinguished the gravity float is marked with a G.{Mr Griffiths - Chief Accountant / Mr Gnapp} The pressure float is not marked. All Winfield carburetors are equipped with pressure floats unless otherwise specified in the order or if ordered in special package equipments for cars which have gravity or vacuum tank feed. When the gravity float is used the C float needle seat should be used. Refer to Instruction Section No. 15 for obtaining the proper float level with either pressure or gravity float. ILLUSTRATION A Cable Holder can be set in any position. ILLUSTRATION B Choke Lever is against stop—butterfly is wide open. ILLUSTRATION —C— Wrong Way (75°) Wrong Way (75°) Right Way (45°) NOW!...You are Ready to Adjust the CARBUReTOR —SEE OTHER SIDE Winfield Carburetor Co., Ltd. Winfield WINNER OF THE FIELD CARBURETORS 3053 TREADWELL STREET LOS ANGELES 1900 EAST JEFFERSON AVE. DETROIT | ||