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| - | [[Category:Fuel System]] Carburetors are complicated, precision analog air/fuel devices. Because it is so easy to make the carburetor worse, the last thing you want to do is dissasemble the carburetor. So first See [[Carburetor Adjustment]]. Only proceed to this dissasembly if the carburetor is known bad. For example: rusted, sitting in mud bucket, or all other engine factors are known good but it still runs poorly: | + | #REDIRECT [[Carburetor Repair]] |
| - | * [[Engine compression test]] | + | |
| - | * [[Ignition Timing]], [[Engine Troubleshooting Overview |Spark/ignition testing]] | + | |
| - | * [[Carburettor Diagnosis|Vacuum system thorougly inspected]] | + | |
| - | If the carburetor is missing parts or shows signs of being poorly assembled (stripped screws, etc) it may need a partial disassembly for inspection. | + | |
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| - | = Disassembly = | + | |
| - | Use exploded view as a guide. The numerical sequence may generally be followed to disassemble unit far enough to permit cleaning and inspection. | + | |
| - | * Remove staking from bowl cover for easy removal of power piston assy. (22). | + | |
| - | * Secondary fuel valve plunger assy. (31) is pressed in carefully. Pry out. | + | |
| - | '''CAUTION:''' Note sizes of jets and their location for proper assy. (record sizes as you remove them.) | + | |
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| - | Exploded view: Parts list & breakdown sheet | + | |
| - | <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=13367 http://datsun1200.com/modules/myalbum/photos/thumbs/13367.jpg] | + | |
| - | <br>Numbers correspond to nomenclature below. | + | |
| - | <br>Diagram is of manual choke model circa 1973. Other models are slightly different. | + | |
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| - | <small>1. COTTER PIN - PUMP LEVER ASSY. | + | |
| - | <br>2. E CLIP - PUMP LEVER ASSY. | + | |
| - | <br>3. LEVER ASSY. - PUMP | + | |
| - | <br>4. SPRING- PUMP LEVER | + | |
| - | <br>5. SCREW & LOCKWASHER (1) -SERVO DIAPHRAGM ASSY. | + | |
| - | <br>6. SCREW & LOCKWASHER (2) -SERVO DIAPHRAGM ASSY. | + | |
| - | <br>7. SERVO DIAPHRAGM ASSY. | + | |
| - | <br>8. SOLENOID ASSY.- ANTIDIESELING | + | |
| - | <br>9. PLUNGER - SOLENOID | + | |
| - | <br>10. SPRING - SOLENOID PLUNGER | + | |
| - | <br>11. GASKET -SOLENOID ASSY. | + | |
| - | <br>12. SPRING - THROTTLE RETURN | + | |
| - | <br>13. SCREW & LOCKWASHER (2) -BOWL COVER | + | |
| - | <br>14. BRACKET -THROTTLE CABLE | + | |
| - | <br>15. SCREW & LOCKWASHER (2) - BOWL COVER | + | |
| - | <br>16. BOWL COVER ASSY. | + | |
| - | <br>17. PIN - FLOAT | + | |
| - | <br>18. FLOAT & LEVER ASSY. | + | |
| - | <br>19. GASKET - BOWL COVER | + | |
| - | <br>20. PUMP ASSY. | + | |
| - | <br>21. BOOT - PUMP | + | |
| - | <br>22. POWER PISTON ASSY. | + | |
| - | <br>23. NEEDLE, SEAT & GASKET ASSY. | + | |
| - | <br>24. SCREEN - FUEL FILTER | + | |
| - | <br>25. JET - PRIMARY SLOW AIR BLEED._____ | + | |
| - | <br>26. JET- SECONDARY SLOW AIR BLEED_____ | + | |
| - | <br>27. SPRING - PUMP RETURN | + | |
| - | <br>28. BALL - PUMP INTAKE CHECK (SMALL) | + | |
| - | <br>29. NEEDLE - PUMP DISC. CHECK | + | |
| - | <br>30. BOOT - SECONDARY FUEL VALVE | + | |
| - | <br> PLUNGER | + | |
| - | <br>31. PLUNGER ASSY. - SECONDARY | + | |
| - | <br> FUEL VALVE | + | |
| - | <br>32. GASKET - PLUNGER ASSY. | + | |
| - | <br>33. SPRING - PLUNGER RETURN | + | |
| - | <br>34. PLUG - SECONDARY FUEL VALVE | + | |
| - | <br>35. GASKET - PLUG | + | |
| - | <br>36. SPRING - SECONDARY VALVE BALL | + | |
| - | <br>37. BALL - SECONDARY FUEL VALVE | + | |
| - | <br>38. POWER VALVE | + | |
| - | <br>39. GASKET - POWER VALVE | + | |
| - | <br>40. JET - PRIMARY SLOW | + | |
| - | <br>41. JET -SECONDARY SLOW | + | |
| - | <br>42. JET - PRIMARY MAIN AIR BLEED_ | + | |
| - | <br>43. TUBE - PRIMARY EMULSION (LARGE) | + | |
| - | <br>44. JET - SECONDARY MAIN AIR BLEED | + | |
| - | <br>45. TUBE - SECONDARY EMULSION (SMALL) | + | |
| - | <br>46. PLUG – PRIMARY MAIN JET | + | |
| - | <br>47. GASKET - PLUG | + | |
| - | <br>48. JET - PRIMARY MAIN JET | + | |
| - | <br>49. PLUG - SECONDARY MAIN JET | + | |
| - | <br>50. GASKET - PLUG | + | |
| - | <br>51. JET - SECONDARY MAIN JET | + | |
| - | <br>52. SCREW & LOCKWASHER (2) - THROTTLE BODY | + | |
| - | <br>53. SCREW (HOLLOW) - THROTTLE BODY | + | |
| - | <br>54. BAFFLE WASHER - HOLLOW SCREW | + | |
| - | <br>55. LOCKWASHER - HOLLOW SCREW | + | |
| - | <br>56. BOWL ASSY. | + | |
| - | <br>57. GASKET - THROTTLE BODY | + | |
| - | <br>58. CAP - IDLE LIMITER (WHEN USED) | + | |
| - | <br>59. NEEDLE - IDLE ADJUSTING | + | |
| - | <br>60. SPRING - IDLE ADJ. NEEDLE | + | |
| - | <br>61. THROTTLE BODY ASSY.</small> | + | |
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| - | = Cleaning = | + | |
| - | Cleaning must be done with carburetor disassembled. | + | |
| - | # Soak parts long enough to soften and remove all foreign material. # Use a carburetor cleaning solvent. | + | |
| - | # Make certain the throttle body is free of all carbon deposits. | + | |
| - | # Wash off in suitable solvent. | + | |
| - | # Blow out all passages in castings with compressed air and check carefully to insure thorough cleaning of obscure areas. | + | |
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| - | '''CAUTION:''' | + | |
| - | * be very careful not to leave fuel bowl assy. (56) in cleaning solvent to long because of the glass window rubber seal which is not replaceable. | + | |
| - | * Do not soak assemblys with attached plastic parts for a long period of time. | + | |
| - | * Do not soak any parts containing rubber or diaphragm and solenoid assemblys. | + | |
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| - | = Reassembly = | + | |
| - | Reassemble in reverse order of disassembly. Note special instructions and follow numerical outline in making adjustments necessary for carburetor being serviced. | + | |
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| - | = Special Instructions = | + | |
| - | * Idle adjusting needle (59) - turn needle in until lightly seated then back out 2 turns. (do not install idle limiter caps at this time.) | + | |
| - | * Baffle washer (54)- when installing, baffle blocks primary side of passage. | + | |
| - | * Secondary fuel valve plunger assy. (31) - when installing aline opening in sleeve with passage in fuel bowl. | + | |
| - | * Pump return spring (27) - install with cross wire to the bottom of pump cylinder. | + | |
| - | * Power piston (22) - after installing lightly restake casting around washer. | + | |
| - | * Pump plunger (20) - before installing flex leather outward slightly. Soak cup in gasoline, kerosene or oil for a few minutes prior to placing in carburetor. | + | |
| - | * Pump lever (3) - hook pump rod in inner hole of lever. | + | |
Current revision
- REDIRECT Carburetor Repair