Contents: Examination ↓ Disassembly ↓
Typical design of a carburetor
1. Accelerator pump lever screw; 2. Lever; 3. Lock washer; 4. Screw with spring washer; 5. Bracket; 6. Secondary chamber diaphragm; 7, 33. Gasket; 8. Fuel cut-off valve; 9. Gasket; 10. Ring; 11, 13, 16, 18, 24, 26, 35, 47, 50, 66, 69, 72. Screw with spring washer; 12, 17. Wiring bracket; 14. Bracket; 15. Diaphragm bracket; 19. Air damper diaphragm assembly; 20. Spring; 21, 22, 23. Emphasis; 25. Bracket assembly with lever; 27. Air damper housing assembly; 28. Float axis; 29. Float; 30. Needle valve and seat; 31. Screen; 32. Piston; 34. Cover; 36. Lock washer; 37. Economizer piston; 38. Spring; 39. Primary chamber idle air jet; 40, 68. Limiter; 41. Ball spring; 42. Ball; 43. Return spring; 44. Small diffuser jet; 45. Primary chamber idle fuel jet; 46. Secondary chamber idle fuel jet; 48. Primary chamber small diffuser nozzle; 49, 52. Small diffuser gasket; 51. Secondary chamber small diffuser nozzle; 53. Screw; 54. Frame; 55. Viewing window; 56. Ring; 57. Economizer valve; 58, 62. 75. Plug; 59, 61, 63, 65, 74. Gasket; 60. Primary chamber main jet (brass); 64. Secondary chamber main jet (chrome plated); 67. Air damper cable bracket; 70. Middle section with float chamber; 71. Spacer; 73. Secondary chamber shut-off valve; 76. Idle needle valve; 77. Spring; 78. Throttle body
The carburetor adjustment data is indicated on the underhood plate.
Typically, signs of abnormal carburetor operation include gasoline overflowing in the float chamber, difficult engine starting, frequent engine stalls at idle, backfires, and slow acceleration of the vehicle.
Some causes of abnormal engine operation that are often associated with the carburetor are caused by leaky hoses, improper engine adjustment, or leaks from under the gaskets.
Examination
1. Before disassembling the carburetor, the following steps should be taken.
2. Check the integrity of the vacuum hoses and that they are connected correctly.
3. Check the tightness of the nuts and bolts of the carburetor and intake manifold.
4. Check the compression in the cylinders.
5. Check the integrity of the ignition system wires.
6. Clean the spark plugs.
7. Check the operation of the accelerator pump by removing the air filter and pressing the throttle lever.
(The information was taken from a web portal: www.toyotaman.ru)
8. Check the throttle opening.
9. Check the serviceability of the recirculation valve and the crankcase ventilation valve.
10. Checks of the electronic components of the carburetor are performed in a car service center.
Disassembly
It is recommended to purchase a refurbished carburetor, using the label on the body of the old unit as a guide (catalog numbers must match exactly).
When disassembling, assembling and cleaning the carburetor, maintain the previous installation order of all parts.
Before disassembling, purchase a carburetor repair kit, which comes with instructions and diagrams.