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).
Specification and tune-up data for a Stromberg AAV-26 carburetor for 1940 Cadillac models.
| Identifier | ExFiles\Box 122\3\ scan0214 | |
| Date | 11th September 1939 | |
| STROMBERG AAV-26 CARBURETOR STROMBERG NO. A-19212 (CODE NO. 205-5A) CADILLAC SYMBOL NO. 1437179 SIZE: 1-1/4" DUAL D.{John DeLooze - Company Secretary} D.{John DeLooze - Company Secretary} 4-HOLE FLANGE 1940 CADILLAC MODELS 40-60 Special, 40-62, 40-72, 40-75 3-1/2" x 4-1/2"—8 cyl. PARTS ILLUSTRATED 1. Choke Valve 2. Power Vac. Passage 3. Main Dis. Jet 4. High Speed Bleeder 5. Float Chamber Vent 6. Idle Air Bleeder 7. Drain Connection 8. Vac. Power Piston 9. Idle Tube 10. Pump Fulcrum Arm 11. Pump Piston Link 12. Felt Dust Washer 13. Retainer Washer 14. Dust Washer Spring 15. Spring Ret. Washer 16. Pump Dur. Spring 17. Pump Piston 18. Piston Expan. Spring 19. Pump Relief Valve 20. Pump By-Pass Jet 21. Power By-Pass Jet 22. Pump Inlet Ck.{Mr Clark} Val. 23. Pump Inlet Strainer 24. Main Dis. Jet Plug 25. Main Metering Jet 26. Sec. Idle Air Bleed 27. Idle Needle Valve 28. Idle Dis. Holes 29. Throttle Valve 30. Primary Venturi 31. Auxiliary Venturi 32. Float 33. Float Lever 34. Float Needle Valve Clip 35. Float Fulcrum Pin 36. Float Needle Valve 37. Float Needle Valve Seat 38. Float Hanger Gaskets 39. Float Hanger 40. Gasoline Inlet 41. Gasoline Strainer 42. External Float Chamber Vent 43. Ext. Float Chamber Vent Passage 44. Automatic Choke Vac. Passage 45. Thermostat 46. Screen 47. Hot Air Tube Conn. 48. Pump Dis. Nozzle 49. Thro. Stop Screw 50. Pump Rod 51. Fuel Level Sight Plug 52. Fast Idle Rod Note—Specifications below are for latest production, previous major changes listed on Parts Page. FUEL LEVEL—Measure 5/8" below top surface of float chamber (without gasket) or level with bottom of level sight hole at 5 lbs. pressure. To correct fuel level, hold air horn in inverted position. Place Tool T-24971 on gasket. Tops of floats should be 3/64" above tops of vertical guides, which will give approximate fuel level; change if necessary. Sides of floats should be tangent to guides of tool with-out drag. MAIN METERING SYSTEM—Venturi 1-1/8"; Main Discharge Jet No. 32 P-23567 (Tool T-24967); High Speed Bleeder No. 70 P-23985. Main Metering Jet .049" P-19442 (Tool T-24924); Use Tool T-19099 Screwdriver for removing main jet plug. Main metering system controls the flow of fuel up to approximately 65 to 70 M.{Mr Moon / Mr Moore} P. H.{Arthur M. Hanbury - Head Complaints} POWER SYSTEM—Power By-Pass Jet No. 53 P-24064; Power jet to come into operation at 4" to 6" of manifold vacuum, which is approximately 65 to 70 M.{Mr Moon / Mr Moore} P. H.{Arthur M. Hanbury - Head Complaints} (Tool T-24733) used to remove vacuum power piston. ACCELERATION—Pump Discharge Nozzles No. 65 in main body; Pump By-Pass Jet No. 58 P-24744. Pump capacity 13 to 17 c.c. per 10 fast strokes and 18 to 22 c.c. per 10 slow strokes with pump rod link set in minimum setting. (Tool T-24972) Pump action takes place during acceleration period only. IDLE SYSTEM—Idle Discharge holes Nos. 52-56. With throttle valve fully closed and No. 56 drill in idle hole, edge of valve is located .040" +—.004" from No. 56 drill; Idle Air Bleed No. 36 P-23536 (in throttle body), No. 52 in Main body; Idle Tube No. 64 P-24009. Adjustment: Adjust to smooth running one barrel at a time, OUT to make richer and IN to make leaner; throttle at 7 to 8 M.{Mr Moon / Mr Moore} P. H.{Arthur M. Hanbury - Head Complaints} VACUUM SPARK CONTROL—With throttle fully closed and No. 58 drill in spark hole, edge of valve is located .012" +—.004" from No. 58 drill. FLANGE GASKET—P-18165. SPECIAL TOOLS REQUIRED—Use Cadillac complete Tool Kit SER-361 T-24733. Power piston wrench T-24967 Main Discharge Jet Remover; T-24924 Main Metering Jet Wrench; T-24970 By-Pass Jet and Check Valve Tester; T-24972 Pump Capacity Burrette Gauge; T-24968 Handle. T-19099 Main jet plug screwdriver; T-24971 Float Gauge; T-25056 Auto-Choke Step Gauge; T-25046 Choke Gauge; T-25047 Choke Lever Lock Nut Wrench. MOTOR TUNE-UP DATA SPARK PLUG—.025" to .030". Clean and adjust at regular intervals. DISTRIBUTOR—.0125" to .0175". Breaker gap set .0125" to .0175". Replace if necessary. IGNITION TIMING—Breaker contacts to open for No. 1 cylinder when mark IG/A on harmonic balancer is in line with pointer. VALVES—Intake, Exhaust. Automatic take-up. SERVICE RECOMMENDATION—Check heat control valve to see that it is free during its entire travel and that thermostat is properly positioned. Printed in U. S. A.{Mr Adams} Page 1 | ||