A spring dropped or came off from my Kenmore sewing machine model 385.16231301, which was inside the upper part and it's like one inch

SOURCE: Kenmore Sewing Machine model # c877.15

I have an old Kenmore and here are the directions from my manual: 1. Draw thread from spool through bobbin winder tension discs. 2. Wind thread around an empty bobbin several times. 3. Place bobbin onto bobbin winder shaft with thread coming from rear of bobbin. Push bobbin winder latch against bobbin until it clicks. 4. Release clutch by turning clutch knob toward you. Start machine.

SOURCE: Dropping Feed dogs on kenmore model 19233

Remove extension table/accessory box by gentle pulling it away from machine. You are left with just the free arm. In the back of the free arm, lower left corner, you will fine the feed dog lever. Push the leaver to the right to lower the feed dog.Instructions for lowering and raising the feed dog are on page 48 of your owner's manual. Good luck!

SOURCE: instructions for theading a Sears Kenmore Sewing machine model 158.14000

all machines thread the same. TTN tension,take up, needle.
Beginning with the spool, guide the thread through the thread guides to the tension assembly. Pull the thread through the tension assembly and test it to make sure the tension is working correctly.
(To do this test,adjust your tension setting to normal or medium or 5 or something in the middle. Raise the presser foot and pull the thread through the tension. It should pull easily!! Lower the presser foot and pull the thread. It should pull noticeably harder.) If it passes this test, continue up through the take up lever,then down through the thread guides to the needle. Make sure your needle is fully inserted and turned the correct way.( If you load your bobbin case from the left side,the needle rule is normally FLAT to the RIGHT is RIGHT. There are some exceptions. If you have a newer style drop in bobbin or your bobbin case loads in the front then the rule is FLAT to the BACK.

To wind the bobbin, guide the thread around the thread guide on
the left top of your machine, then to the bobbin winder. Wind the thread around the bobbin several times, place the bobbin on top of the bobbin winder, push it against the wheel and press the foot pedal. It should stop winding when the bobbin is full or you take your foot off the control

Sewman7

SOURCE: Kenmore sewing machine manual for model # 148 12080. (older)

i have a older kenmore sewing machine model #148.19370

SOURCE: Dropping Feed dogs on kenmore model 19233

Pull out the removable table and you will see the drop down feed dogs switch lever behind the back of the machine. Move that lever to the left or right to have feed dogs go back to normal sewing mode OR for embroidery mode.