Vintage Oldsmobiles Curved Dash, Limited Touring, Models 40, 53, 66; Series 60, 70, 90

1956 4bl carb help

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Old March 5th, 2015, 04:14 PM
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1956 4bl carb help

I finally got the carb back on the 324 and saw a spring that was leftover. I can see in a picture I had that it must hook vertically on the drivers side but I cannot see where? Can anyone help with this cause I would like to get her running this weekend.
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Old March 6th, 2015, 05:12 AM
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The only vertical spring that I am aware goes on the drivers side on the inside of the throttle linkage and pivots backwards with movementof the throttle .Spring is about 2"s long and seems to open the 4 barrels. Larry
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Old March 6th, 2015, 07:01 PM
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Here is where the spring attaches at the top hole. I have seen other pics where it shows the spring connected here but runs behind the linkage where I cannot see where it hooks up.
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Old March 6th, 2015, 08:22 PM
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The spring you are referring to is called the Auxiliary Bellcrank Downshift Lever Return Spring. Its part number is 561995 (group 3.586). Its purpose is to return the downshift linkage from a forced downshift configuration after the accelerator is released from a fully depressed condition. The top of it fastens in the hole indicated in your photo. The bottom of it attaches to the groove in the lower inner pin on the bellcrank. This arrangement also retains the throttle control rod (3.430; 564733) on the same pin. No fastener (3.425; 564708) is used on this pin in contrast to the other pins on the bellcrank.
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Old March 6th, 2015, 09:17 PM
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I thought that is where it went. I had attached that rod with a keeper and had the spring left over. Will correct it. Thanks for your help
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Old March 7th, 2015, 05:47 AM
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Thanks Ozzie ,I saw the spring on my car that he was talking about, but could not see where it fastened on the lower end or know it's purpose. Larrt
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