I dropped the feed dogs and they won't come back up.

check on the back of your machine for a slide switch.

it would really be a good idea to have the machine serviced at a sewing
machine shop

Re: Reverse feed dogs on Singer 4423 Remove extension table so you can see switch on BACK of machine @ left side. Flip switch to raise feed dogs up. If machine actually sewing in reverse - check n Buttonhole adjustment. Reset it (located bottom right side machine) Jimmy

The feed dogs are driven by the feed driver mechanism, turn the hand-wheel forward and the feed dogs will come up. (Providing you have the feed dog switch to the up position).

Hello

First, lift the presser foot; next, push the feed dog lever to the raised position; finally, turn the handwheel towards you until you hear the feed dogs snap into place

If it doesn't, you will have to run a maintenance check on your feed dogs,

Unplug the machine and examine the feed dogs. The newer machines have metal feed dogs, but older models may have rubber ones, which often need replacing. Examine the feed dogs and check for damage.

Remove the throat plate, which is the covering over the feed dogs, and clean it with a soft cloth. Use a small soft brush to clean the feed dogs. Make sure to remove all lint and thread from the grooves of the teeth. Some machines have an adjustment that lowers the feed dogs for specific sewing procedures. They should be in the raised position for better viewing during the cleaning process.

Clean the area around the feed dogs with a soft brush. Compressed air is a good choice to use in the small tight areas.

Wipe down all areas with a clean, lint free cloth before replacing the throat plate.

Prepare to clean the feed dogs and all other areas that lint may accumulate on, after every project. Your sewing machine will last longer and need fewer repairs if kept clean and lint free.

Always unplug the sewing machine before any type of maintenance or cleaning.

Never use a sharp tool when cleaning the feed dogs as this may cause damage to the sewing machine.

There is a little lever on the back of the free arm at the bottom. Push the lever to the right and that will lower the feed dog.

Make sure you do not have lint "trap" that is keeping the feed dogs up. Clean it out with some canned air and look closely at the grooves to make sure they are not full of lint.

hi! there if your feed dog does not move the fabric forward or backward,if this is so try to run machine w/o the fabric check if feed dog move on cycle,the teeth should be moving upward and downward rotation pushing action on your fabric,the teeth should come out to the plate slot of feed dog.if not adjust upward, and adjust also the presser foot of needle.if your feed dog is not moving when machine running,thre is a mechanical disengage or loosen in shuttle assymble and feeder dog mechanism they link together ubder the machine,as the shuttle move on one stroke the feeder also move also with the needle.Chesk the adjustment and link mechanism.in addition to this try to clean feed dogs by brush chips thread and fabrics sometimes stored on mechanism of feed dogs and shuttle.

The embroidery carriage automatically lowers the feed dogs when put in place

Remove the needleplate and clean between the teeth of the feeddogs.
Ensure the feeddogs are not lowered for free motion sewing.
Don't know the make/model to be any more specific, so post back here or to the Contact Us page at  www.bargainbox.com.au if there is more to do.