Unplug the Weed Eater TE40. Pull the tap button and remove the spool.
Clean the area under the spool to remove any yard waste or build up.
Insert a new spool of monofilament line and push in the tap button. Plug the Weed Eater TE40 into a power source and test the operation.
Unplug the Weed Eater TE40. Pull the tap button and remove the spool.
Cut 30 feet of line with a scissors. Insert 1/2 an inch of line into the small slot inside the spool. Slowly and firmly wind the line onto the spool in the direction of the arrow on the spool. Insert the line into the notch and then through the exit hole of the hub, leaving 5 to 7 inches of line on the outside of the spool.
Push the spool into the hub until the spool locks into place. Pull the line and release it from the notch. Plug the Weed Eater TE40 into a power source and test.